Texas Instruments TPA0202 User's Manual
Contents
1. OLI Power Signal Conditioning Amps 8 i 5216 gt 8 zh 1 Ei i du 3 192 a 16 O 9 18 29 _ 8 3 5 Polarity Lo LIC EVM boards with pf Hi applied onl SA eo Output as m Z U O a 2 2 Quick Start Quick Start List for Platform 2 2 Quick Start List for Platform Follow these steps when using the TPA0202 EVM with the TI Plug N Play Au dio Amplifier Evaluation Platform see the platform user s guide SLOUO 11 for additional details Numbered callouts for selected steps are shown in Figure 2 1 and Figure 2 2 and details appear in Chapter 3 Platform preparations 1 Ensure that all external power sources are set to OFF and that the platform power switch S1 is set to OFF 2 Install a TPA0202 module in platform socket U2 taking care to align the module pins correctly 3 Use switch S2 to select or bypass the signal conditioning EVM U1 4 Setcontrol signal Polarity jumper 8 to Hi 5 Setjumper JP6 to select the Mode control input causes the TPA0202 to switch to the single ended output mode if a plug is inserted into platform headphone jack J10 6 Ifthe headphone Jack J10 output will be used set Hp source switch S3 to 02 04 Table 2 3 Platform Jumper and Switch Settings for the 0202 Notes 1 Don t care 2 Set S2to ON when signal conditioning board is insta2. rrr 1 3 12 202 EVM Specifications bea ges maler as 1 4 Ee AS a EE cece 2 1 2 1 aw eas 2 2 22 Quick Start List Tor Platform 2 3 23 Quick Start List for Stand Alone 2 5 slc 3 1 PICCAULONS PPP 3 2 3 2 TPA0202 Audio Power Amplifier Evaluation Module 3 3 3 2 1 TPAD202 Audio Amplifier IC 3 4 3 2 2 Depop Circuitry 3 5 oo pts SENT 3 5 3 2 4 SlIngle Ended Operation 3 6 Inputs ut uds edP tase 3 6 3 3 Using The TPA0202 EVM With the Plug N Play Evaluation Platform 3 7 3 3 1 Installing and Removing EVM Boards 3 7 3 3 2 TPAO0202 Module Jumper Settings and Switches 3 8 3 ROU 3 11 994 MUle MOOG 2 near RPM eee cede 3 12 3 3 5
3. lt 3 14 205 RENEE RE DP SES 3 15 3 4 Using 0202 EVM Stand Alone 3 16 3 4 1 TPA0202 EVM Connected for BTL Output 3 16 3 4 2 0202 EVM Connected for Single Ended Output 3 17 3 5 0202 Audio Power Amplifier Evaluation Module Parts List 3 18 Figures 1 11 1 c OOF The TI 0202 Audio Amplifier Evaluation Module 1 3 Quick Start Platform Map 2 2 Module lt dictu doit d 2 4 Quick Start Module Map xessaecwex ewexeezaumelisws eS pP dE pii Sande eds 2 5 The TI Plug N Play Audio Amplifier Evaluation Platform 3 2 TRAO OZ EYN cede sae ES 3 3 0202 EVM Schematic Diagram 2 6 csc de us doe 3 4 TPAD202 Amplifier TO 3 5 0202 EVM Jumpers and Switches 3 8 Platform Signal Routing and Outputs 3 11 Mute Mode and Polarity Control 0 0 ccc ene en 3 12 Typical Hea
4. Oft duced XP Ce Lowe R as T U2 7 8 9 Audio Sianal 1 i 0202 Speaker input gt 0 L L i j U5 f amp J10 Headphone Headphone Amplifier _ Output e e o e L 95 3 3 3 1 Signal Conditioning The audio signal from the input jacks can be applied to the signal conditioning socket U1 ifan EVM is installed there or socket U1 can be bypassed and the audio input signal applied directly to the inputs of the 0202 L Switch S2 selects signal conditioning or bypasses it 3 3 3 2 Headphone Output Jack owitch S3 is the source select for the stereo headphone output jack J10 The headphone jack is capacitively coupled via 470 uF electrolytics and can output either the signal from the headphone amplifier in socket U5 or the signal from the TPA0202 power amplifier installed in socket U2 as determined by the setting of headphone source select switch S3 When S3 is set to the power amplifier position U2 U4 the headphone jack is connected to the TPA0202 power amplifier OUT output lines When plug is inserted into the jack signals output through J10 are returned to platform ground requiring single ended power amplifier operation A switch inside the headphone jack produces a control signal that can be routed to the power amplifier socket to shut down the TPA0202 EVM or switch it to single
5. NC ROUT RLINE IN RHP IN RBYPASS RVpp NC NE ROUT C10 C11 X 22uF 10uF ROUT RIN RHP HP LI Z E ROUT SE BTL The TPA0202 audio amplifier IC is a CMOS device intended primarily for bridge tied load BTL operation in battery powered applications It is supplied in a very small 24 pin TSSOP thermal surface mount package and has been designed to operate from low supply voltages between approximately 3 V and 5 5 V and deliver full power at distortion levels of less than 0 1 THD N from 5 V supply Figure 3 4 Typical applications include portable computers and multimedia systems Details The 0202 Audio Power Amplifier Evaluation Module Figure 3 4 TPA0202 Amplifier IC The IC includes two separate amplifier channels each of which can operate in either the bridged tied load BTL mode or the single ended mode as selected by the SE BTL pin In the BTL mode the two output lines of each channel operate 180 out of phase with each other for increased power The speaker load is connected directly across OUT and OUT and neither line is connected to ground BTL operation provides many benefits including quadruple the output power of single ended operation and no need for bulky output coupling capacitors In the single ended mode the speaker load is connected between the OUT terminal through an output coupling capacitor to system ground For more information see
6. ON Jumper S4 connects the SE BTL output mode control input pin on the amplifier IC directly to Vpp so that when 54 is ON the IC is held in the single ended output mode regardless of the state of the SE BTL module control input When S4 is OFF a pulldown resistor on the module holds the IC output mode control input pin low keeping the IC in the BTL output mode Details 3 9 Using The TPA0202 EVM With the Plug N Play Evaluation Platform 3 3 2 5 S5 VDD Bridge Jumper Jumper 55 connects the module LVpp power supply line to the RVpp power supply line When the TPA0202 EVM is plugged into the platform both VDD supplies are sourced from the same platform power bus so the state of jumper S5 is irrelevant If the EVM is used stand alone jumper S5 can be set to ON to simplify connection of the module to external power or set to OFF to allow each amplifier channel to be powered from a separate supply 3 3 2 6 56 Autosense Jumper To automatically select the headphone inputs when the single ended output mode is selected by the module SE BTL control input set autosense control jumper S6 to ON Jumper S6 connects the SE BTL output mode select pin of the amplifier IC to the HP LINE input select pin of the amplifier IC so that the HP input is selected automatically when the single ended output mode is selected by the mode signal applied to the module SE BTL control input pin Note that when autosense jumper S6 is set to ON th
7. OUT lines from the power amplifier sockets are not tied to each other or to platform ground This allows the TPA0202 power amplifier EVM to operate in the highly efficient bridge tied load configuration when driving speakers The headphone jack J10 is capacitively coupled to source select switch S3 which connects J10 to the output lines of either the headphone amplifier socket or the power amplifier sockets Figure 3 5 When the TPA0202 output signal is routed to J10 by S3 signals output via J10 are returned to platform ground when a plug is inserted Figure 3 7 requiring single ended operation of the power amplifiers Figure 3 8 Typical Headphone Plug Left Right GND Details 3 15 Using The TPA0202 EVM Stand Alone 3 4 Using The TPA0202 EVM Stand Alone Using the 0202 Audio Power Amplifier Evaluation Module stand alone is much the same as using it with the platform The same 3 V to 5 5 V power supply range and the isolated OUT and OUT lines for BTL operation requirement exists Note that the mute signal applied to the EVM mute pin must be able to supply enough current to overcome the pulldown resistor on the module 100 kQ 3 4 1 0202 EVM Connected for BTL Output Figure 3 9 TPA0202 EVM Connected for Stereo BTL Output 5V C7 R10 RVDD O GND R11 O RHP Audio Oceno H ch LJ ss Em Right 424 TD R9 S3 Right C GND A HP L C9 54 SE BTL O TPA0202 SAMPLE EVM 5
8. V Lit SLOP202 S8 External Mute Control is u active high Audio R4 C5 Input B1 H H 2 71 Left C12 LVDD 5V zm Table 3 1 Typical 0202 EVM Jumper Settings for BTL Stand Alone ew s s s s s _ Note shunt installed OFF open X don t care S8 always OFF 3 16 Details Using 0202 EVM Stand Alone 3 4 2 TPA0202 EVM Connected for Single Ended Output Figure 3 10 0202 EVM Connected for Stereo Single Ended Output 5V ae th RVDD O GND R11 Input ROUT Right o LI s R9 E m pal 33 uF HP L R7 1000 Hs co 94 EI SEBTL O 5V 0202 SAMPLE EVM i R12 Lit SLOP202 EH TT S8 Di R13 RE 5 C3 R4 C5 s2 NN MUTE G 33 uF EST Mute 4 1000 uF R1 Audio oo Si LOUT O Input R3 ci2 Left LVDD GND RS 5V Table 3 2 Typical TPA0202 EVM Jumper Settings for Single Ended Stand Alone St s 5 so Note ON shunt installed OFF open X don t care S8 always OFF Details 3 17 TPA0202 Audio Power Amplifier Evaluation Module Parts List 3 5 0202 Audio Power Amplifier Evaluation Module Parts List Table 3 1 0202 EVM Parts List EVM Manufacturer C1 C2 C6 C7 C4 C5 C9 C10 C3 C8 C11 C12 H1 R2 H4 R8 R9 R10 R2 R7 R5 R6 H11 R12 R13 D1 S2 S7 S1 5
9. ended output mode when a plug is inserted Source select switch S3 connects the headphone jack to the output lines of either the headphone amplifier socket U5 or the power amplifier sockets U2 U4 B Tokeep the TPA0202 amplifier outputs separated set switch S3 to the headphone amplifier position U5 and use the speaker outputs J7 J8 and J9 To route the TPA0202 amplifier outputs to the headphone output jack J10 set switch S3 to the power amplifier position U2 U4 use this setting only if the TPA0202 EVM is to drive single ended loads connected to J10 Details 3 11 Using The TPA0202 EVM With the Plug N Play Evaluation Platform 3 3 4 Mute Mode The TPA0202 EVM is equipped with a mute control input pin When this input is tied to Vpp the TPA0202 amplifier IC on the module enters the mute mode and dissipates very little power When the EVM control input is tied to GND or allowed to float amplifier operation resumes In typical applications as often found in notebook computers portable audio products and such the internal speakers mute when headphones are plugged into the headphone jack or internal speakers mute when external speakers are connected In applications using separate speaker and headphone amplifiers the one not being used can be shut down muted to conserve power A mode control input on the EVM switches the 0202 amplifier IC between the bridge tied load BTL output mode and the
10. platform and EVMs to quickly model many possible end equipment configurations There is nothing to build nothing to solder and nothing but the speakers included with the platform to hook up Introduction 1 3 TPA0202 EVM Specifications 1 3 0202 EVM Specifications SUDD voltage tange caw at avon Ecl Ut SEI C PW 3 V to 5 5 V Supply current 71 1 2 A max Continuous output power per channel 4 0 BIL V 2W 4 O BIL Vpp 3 3 V 800 mW A dio input voltage Vic E eE ranea vga eia 4 Vpp max 0 75 Vpp max Minimum load impedance RY 5 25 525 8 Ere RR SOR TOR babe es 30 Introduction Chapter 2 Quick Start The steps in this chapter can be followed to quickly prepare the TPAO202 audio amplifier EVM for use Using the 0202 with the TI Plug N Play Audio Amplifier Evaluation Platform is a quick and easy way to connect power signal and control inputs and signal outputs to the EVM using standard connectors However the audio amplifier evaluation module can be used stand alone by making connections directly to the module pins and can be wired directly into existing circuits or equipment The platform switch and jumper settings shown in Table 2 1 are ty
11. 3 56 58 P1 P3 P4 U1 PCB1 3 18 Capacitor 1 uF 80 20 nonpolarized Capacitor 2 2 uF 20 nonpolarized Capacitor 5 pF Capacitor 10 uF 6 3 V Resistor 20 kQ 1 8 W 5 Resistor 50 kQ 1 8 W 5 Resistor 100 kQ 1 8 W 5 Resistor 510 kQ 1 8 W 5 Diode Switch momentary Header 2 position Shunts IC TPA0202 audio amplifier 2 W 2 channel PCB TPA0202 EVM 1206 1206 0805 0805 0805 0805 0805 SMD SMD 2mm 2mm 24 pin TSSOP 4 Murata GRM42 6Y5V105Z16BL TDK C3216X5R1A225 Panasonic ECU V1H050CCN Panasonic ECS TOJY106R Panasonic ERJ 8GEYJ203V Panasonic ERJ 8GEYJ503V Panasonic ERJ 6GEYJ104V Panasonic ERJ 6GEYJ510V Panasonic P8048SCT ND Norcomp 3M TI 0202 SLOP202 93F2254 Digi Key PCCO50CNCT ND Digi Key PCS1106CT ND Digi Key P20KKABK ND Digi Key P50KKABK ND Digi Key P100KABK ND Digi Key P510KABK ND Digi Key P8048SCT ND Digi Key 2163 02 ND Digi Key 953170 30 ND Details
12. 49 5 INSTRUMENTS 202 Audio Power Amplifier Evaluation Module Users Guide May 1998 Mixed Signal Products SLOUO16 IMPORTANT NOTICE Texas Instruments TI reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice and advises its customers to obtain the latest version of relevant information to verify before placing orders that the information being relied on is current Tl warrants performance of its semiconductor products and related software to the specifications applicable at the time of sale in accordance with standard warranty Testing and other quality control techniques are utilized to the extent Tl deems necessary to support this warranty Specific testing of all parameters of each device is not necessarily performed except those mandated by government requirements Certain applications using semiconductor products may involve potential risks of death personal injury or severe property or environmental damage Critical Applications TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED INTENDED AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN LIFE SUPPORT APPLICATIONS DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS Inclusion of TI products in such applications is understood to be fully at the risk of the customer Use of TI products in such applications requires the written approval of an appropriate officer Questions conce
13. best performance highest output power with lowest distortion the module should be operated at approximately 5 V unless there is a specific reason for operating it from a lower voltage The TI Plug N Play Audio Amplifier Evaluation Platform with a voltage regulator EVM installed on it can provide a regulated Vpp supply from a wide variety of unregulated Vcc voltage inputs between approximately 5 5 V and 12 V including an on board 9 V battery Or an external regulated power source can be used to supply Vpp voltage to the platform and the TPA0202 evaluation module installed on it Although the 0202 amplifier draws approximately 1 25 A from the power supply during continuous full power output peak current draw can be as high as 2 A Any power supply connected to the platform should be capable of providing 2 A of current to avoid clipping of the output signal during peaks Current consumption driving speakers at normal listening levels is typically 0 5 Aor less The platform is equipped with overvoltage and reverse polarity supply voltage input protection in the form of fused crowbar circuits L Vpp voltage applied to platform screw terminals J6 MUST NOT exceed the absolute maximum rating for the TPA0202 amplifier IC installed on the evaluation module 6 V or damage to the IC may result In no case should Vpp voltage of the incorrect polarity or in excess of 6 1 V be applied to screw terminals J6 of the platform or the power protec
14. dphone Pid RITE 3 15 0202 EVM Connected for Stereo BTL Output 3 16 0202 EVM Connected for Stereo Single Ended Output 3 17 Tables I d 4 Op NO A vi Typical TI Plug N Play Platform Jumper and Switch Settings for the TPA0202 2 1 Typical TPA0202 EVM Jumper Settings 2 1 Platform Jumper and Switch Settings for the TPA0202 2 3 Typical TPA0202 EVM Jumper Settings 2 4 Typical TPA0202 EVM Jumper Settings for BTL Stand Alone 3 16 Typical TPA0202 EVM Jumper Settings for Single Ended Stand Alone 3 17 TPA0202 EVM Parts 05 icai Hora totais acean dede ee V Ra gi 3 18 Chapter 1 Introduction This chapter provides an overview of the Texas Instruments TPA0202 Audio Amplifier Evaluation Module SLOP202 It includes a list of EVM features a brief description of the module illustrated with a pictorial diagram and a list of EVM specifications Topic Page 1 1 Feature Highlights 1 2 Description 1 3 TPAO0202 EVM Specifications Feature Highlights 1 1 Feature Highlights TPA0202 Audio Amplifier Evaluation Module and the TI Plug N Play Audio Amplifier Evaluation Platform include the following featu
15. e headphone input and the single ended output mode are selected and the SE BTL control signal will have no effect if either jumper S3 or jumper S4 are set to ON 3 3 2 S7 SE Output Mode Switch Pushbutton switch S7 on the TPA0202 EVM allows the manual selection of the single ended output mode When used in conjunction with mute switch S2 output thumps and pops that might occur when returning to normal operation from the mute mode can be eliminated by releasing mute switch S2 half a second before releasing the SE output mode switch S7 see the 0202 data sheet for more information In atypical application this sequencing can be controlled by the system micro controller or external logic 3 3 2 8 S8 Junction Temperature Measurement Jumper 3 10 Set junction temperature measurement jumper S8 to OFF for normal operation The TPA0202 amplifier IC sources a current proportional to the device junction temperature that can be measured at the terminals of jumper S8 with an ammeter This is not intended as a real time measurement but as an aid to the design and characterization of the PCB on which the IC is mounted See the 0202 IC data sheet for additional information Details Using The TPA0202 EVM With the Plug N Play Evaluation Platform 3 3 3 Signal Routing Signal flow on the platform is controlled by two signal routing switches as shown in Figure 3 5 Figure 3 6 Platform Signal Routing and Outputs
16. eaker to the module OUT and GND pins of each channel through 33 uF to 1000 uF output coupling capacitor Figure 3 10 Quick Start 2 5 Quick Start List for Stand Alone 2 6 Evaluation Module Preparations To have the module amplifier IC enter the shutdown mode when the module mute control input is activated set shutdown jumper S1 to ON To have the amplifier IC only mute when the module mute control input is activated set shutdown jumper S1 to OFF To select the line inputs set input select jumper S3 to OFF To select the headphone inputs set input select jumper S3 to ON To allow the module SE BTL control input to switch the amplifier IC between single ended SE and bridge tied load BTL output modes set output mode jumper S4 to OFF To keep the module amplifier IC in the single ended output mode regardless of the control input state set jumper 54 to ON Set Vpp bridge jumper S5 to ONto connect the RVDD and LVDD module power input pins together or to OFFto keep the two power inputs isolated on board 10 To automatically select the headphone inputs when the single ended output mode is selected by the module SE BTL control input set autosense control jumper S6 to ON To isolate the amplifier IC input select pin from the module output mode select control input set autosense control jumper S6 to OFF 11 Set junction temperature measurement jumper S8 to OFF for normal operation Control Inputs 12 Connect c
17. irements In the following discussion setting a jumper to ON means that a shunt is installed across the two pins of the jumper Setting a jumper to OFF means that no shunt is installed on the jumper See Figure In typical applications some or all of the jumper functions are controlled by the system microcontroller or external logic Figure 3 5 TPA0202 EVM Jumpers and Switches LOUT LIN LHP LVDD LOUT MUTE IN GND HS GND HS ROUT TPA0202 LOUT ROUT LLINE IN RLINE IN RIN LHP IN RHP IN RHP LBYPASS RBYPASS LVDD RVDD 1 RVpp C10 Gii SHUTDOWN NC T 22uF 10pF MUTE OUT HP LINE S3 HP LINE LOUT ROUT MUTE IN SE BTL ROUT GND HS GND HS a SE BTL Details Using The TPA0202 EVM With the Plug N Play Evaluation Platform 3 3 21 S1 Shutdown Jumper To have the module amplifier IC enter the shutdown mode when the module mute control input is activated set shutdown jumper S1 to ON The mute control output on the TPA0202 amplifier IC follows the mute control input pin and is buffered Jumper S1 connects the mute output pin to the shutdown control input pin of the IC so that when 51 is ON the IC is forced into shutdown mode instead of mute mode when the mute control input goes high When S1 is OFF a pulldown resistor on the module holds the IC shutdown control input pin low keeping the IC out of the shutdown mode The shutdown mode reduces IC current consumption to approximately 5 uA c
18. ition the values selected for the gain setting resistors affect the performance of the internal depop circuitry see the 0202 data sheet The TPA0202 amplifier IC as most other amplifiers exhibits its best distortion and noise performance at lower gain levels see the 0202 data sheet Even so the TPA0202 at its highest gain setting has significantly less distortion than most low cost speakers Gain versus total harmonic distortion THD should be considered in each application Both the module input signal level and the TPA0202 module gain should be adjusted to obtain the lowest overall distortion level for a particular overall gain A quick rule of thumb everything else being equal the module input signal level should be as high as possible without clipping or overloading the 0202 input and the 0202 gain should be kept as low as possible Details Using The TPA0202 EVM With the Plug N Play Evaluation Platform 3 3 Using The TPA0202 EVM With the Plug N Play Evaluation Platform The 0202 Audio Amplifier Evaluation Module was designed to be used with the TI Plug N Play Audio Amplifier Evaluation Platform It simply plugs into socket U2 The following paragraphs provide additional details for using the 0202 EVM with the platform 3 3 1 Installing and Removing EVM Boards TI Plug N Play evaluation modules use single in line header pins installed on the underside of the module circuit board to plug in
19. line inputs set input select jumper S3 to OFF To select the headphone inputs set input select jumper S3 to ON 13 To allow the module SE BTL control input to switch the amplifier IC between single ended SE and bridge tied load BTL output modes set output mode jumper S4 to OFF To keep the module amplifier IC in the single ended output mode regardless of the control input state set jumper S4 to ON 14 Set Vpp bridge jumper S5 to either ON or OFF for normal operation 15 To automatically select the headphone inputs when the single ended output mode is selected by the module SE BTL control input set autosense control jumper S6to ON To isolate the amplifier IC input select pin from the module output mode select control input set autosense control jumper S6 to OFF 16 Set junction temperature measurement jumper S8 to OFF for normal operation Table 2 4 Typical TPA0202 EVM Jumper Settings 2 4 S1 sa 5 5 5 Note 58 should remain open at all times ON shunt installed OFF open Power Up 17 Verify correct voltage and input polarity and set the external power supply to ON If Vcc and an on board regulator EVM are used to provide Vpp set platform power switch 51 to Platform LED2 should light indicating the presence of Vpp and the evaluation modules installed on the platform should begin operation 18 Adjust the signal source level as needed Quick Start Quick Start List for Stand Alo
20. lled in U1 set S2 to OFF when no signal conditioning board is installed Power supply 7 Select and connectthe power supply ensure power supply is set to OFF a Connectan external regulated power supply setto 5 V to platform Vpp power input connector J6 taking care to observe marked polarity Or b Install a voltage regulator EVM SLVP097 or equiv in platform socket U6 Connecta 7 V 12 V power source to a platform Vcc power input J1 or J2 and jumper the appropriate power input see platform user s guide Inputs and outputs 8 Ensure that the audio signal source level is set to minimum 9 Connect the audio source to left and right RCA phono jacks J3 and J5 or stereo miniature phone jack J4 10 Connect 3 8 0 speakers to left and right RCA jacks J7 and J9 or to stripped wire speaker connectors J8 Quick Start 2 3 Quick Start List for Platform Evaluation Module Preparations Figure 2 2 Module Preparation R10 RVDD O C11 C8 R9 53 EX vs Di co 54 0202 SAMPLE EVM Lit SLOP202 O GND OUN 05 R1 O GND O LHP C2 R3 C12 LVDD O O GND EE si Lout o GND R5 LOUT O 11 To have the module amplifier IC enter the shutdown mode when the module mute control input is activated set shutdown jumper S1 to ON To have the amplifier IC only mute when the module mute control input is activated set shutdown jumper S1 to OFF 12 To select the
21. load output modes The module can be used with the TI Plug N Play Audio Amplifier Evaluation Platform Figure 3 1 or wired directly into circuits or equipment The module has single in line header connector pins mounted to the under side of the board These pins allow the module to be plugged into the platform which automatically makes all the signal input and output power and control connections to the module The module connection pins are on 0 1 inch centers to allow easy use with standard perf board and plug board based prototyping systems Or the EVM can be wired directly into existing circuits and equipment when used stand alone The module appears in Figure 3 2 and its schematic is shown in Figure 3 3 Figure 3 2 TPA0202 EVM C7 R10 RVDD O O GND R11 ROUT ch sm GND O S6 ROUT O C8 RQ 53 HP L B L 54 SE BTL O 0202 SAMPLE EVM R12 Lit SLOP202 E 57 ss Di a ri O LIN O GND O LHP C12 ES OGND rq R4 C5 s Mute si Lout o GND O R5 OUT O LVDD O O GND Details 3 3 The TPA0202 Audio Power Amplifier Evaluation Module Figure 3 3 TPA0202 EVM Schematic Diagram LOUT GND HS GND HS 0202 LOUT LIN LLINE IN LHP LHP IN LBYPASS LVDD LVDD SHUTDOWN MUTE OUT LOUT LOUT MUTE IN MUTE IN GND HS 3 2 1 TPAO0202 Audio Amplifier IC
22. n modules and or the power source Inserting or Removing EVM Boards Do not insert or remove EVM boards with power applied damage to the EVM board the platform or both may result Figure 3 1 The TI Plug N Play Audio Amplifier Evaluation Platform 665515 Fi Q 29 82 gj Sro 4 SS p 1 2 gt y zi Power In Out po ofS o 3 R2 lt RI om D om Audio OQ Power Signal Conditioning Amps 5 2 O O O X J mi Q O O Speaker MEME dq Q 8 o OQ 5 zg A Mute C AUTION Do not insert or remove O EVM boards with power A applied O Zm 77 Qax Headphone Output Plug N Play Audio Amplifier ae Q m Evaluation Platform 279 S HP Out C T SLOPO097 Rev C 1 m ESS faa gs 3 2 Details The 0202 Audio Power Amplifier Evaluation Module 3 2 The 0202 Audio Power Amplifier Evaluation Module The 0202 Audio Power Amplifier Evaluation Module is powered by a 0202 stereo power amplifier capable of delivering greater than 2 W of continuous power per channel into 3 Q loads The amplifier IC can be operated in either the BTL or single ended output mode The evaluation module includes control inputs for muting and shutdown selection between two sets of stereo inputs and switching between single ended and bridge tied
23. n the platform in the signal path to the headphone output jack for this purpose and a control signal from the platform headphone jack can be routed to the module control input pin to switch the 0202 IC to the single ended mode In the single ended mode the amplifiers inside the TPA0202 IC that drive the OUT lines do not operate and do not dissipate any power The OUT pins go into a high impedance state and can be left connected or allowed to float Inputs and Gain Each channel has two separate signal inputs that are pin selectable They are called ine L and headphone HP The line inputs are fixed at a gain of 10 and the headphone inputs are fixed at a gain of 1 In the typical application in which the 0202 powers small speakers until headphones are plugged in the difference in the gain selected for the two inputs provides approximately the same perceived listening level in the headphones as from the speakers An input multiplexor in the amplifier IC selects between the two inputs according to the state of the HP LINE IC pin Gain for each input is determined by the ratio of the input resistor to the feedback resistor on the module PCB And although the input gains are fixed at the factory they can be adjusted by changing the resistor values on the module PCB However care must be taken because the surface mount solder pads on the PCB are somewhat fragile and will not survive many soldering desoldering operations In add
24. ne 2 3 Quick Start List for Stand Alone Follow these steps to use the TPA0202 EVM stand alone or when connecting it into existing circuits or equipment Connections to the TPA0202 module header pins can be made via individual sockets wire wrapping or soldering to the pins either on the top or the bottom of the module circuit board Numbered callouts for selected steps are shown in Figure 2 3 and details appear in Chapter 3 Figure 2 3 Quick Start Module Map C7 R10 RVDD O RHP O GND C11 H8 C6 ORIN Tm IUD c8 ss n ve m co 54 0202 SAMPLE EVM Lit SLOP202 s Lout o GND R5 LOUT O O LHP C12 LVDD O GND Power supply 1 Ensure that all external power sources are set to OFF 2 Connect an external regulated power supply set to 5 V to the module VDD and GND pins taking care to observe marked polarity Separate right channel and left channel VDD supplies can be connected or a single supply can be used for both Inputs and outputs 3 Ensure that audio signal source level adjustments are set to minimum 4 Connect the audio source to the module RIN LIN and GND or RHP LHP and GND pins of each channel taking care to observe marked polarity 5 Select output mode a For BTL output connect an 3 8 Q speaker to the module OUT OUT pins of each channel Or b For single ended output connect a headphone or an 3 Q 8 sp
25. ompared to approximately 1 5 mA in the mute mode It takes longer however to resume normal operation from the shutdown mode approx 1 s to 2 s than it takes to resume normal operation from the mute mode approx 100 ms to 500 ms 3 3 2 2 S2 Mute Switch Pushbutton switch S2 on the TPA0202 EVM allows manual muting of the amplifier IC 3 3 2 8 S3 Input Select Jumper To select the line inputs set input select jumper S3 to OFF To select the headphone inputs set input select jumper S3 to ON The 0202 amplifier IC has two separate inputs for each channel An internal multiplexor selects which input will be connected to the amplifier based on the state of the HP LINE pin on the IC However the EVM HP L control input pin is not directly controlled by anything on the platform the platform socket for that module pin is N C The amplifier IC HP LINE control pin can be tied high manually via jumper S3 or connected to the amplifier IC SE BTL control pin via jumper S6 so that it follows that control signal For manual control jumper S3 connects the HP L module control input pin to Vpp so that when S3 is ON the headphone inputs are selected When 53 is OFF a pulldown resistor on the module holds the IC shutdown control input pin low selecting the line inputs 3 3 2 4 S4 Output Mode Jumper To keep the module amplifier IC in the single ended output mode regardless of the module control input state set jumper S4 to
26. ontrol lines to the various module control input pins as needed a HP L Ahigh selects the headphone input pins a low or float selects the line input pins b SE BTL A selects the single ended output mode a low or float selects the bridge tied load output mode c MUTE A high mutes the amplifier IC on the module a low or float allows normal operation Power up 13 Verify correct voltage and input polarity and set the external power supply to ON The EVM should begin operation 14 Adjust the signal source level as needed Quick Start Chapter 3 Details This chapter provides details on the 0202 IC the evaluation module and the steps in the Quick Start List additional application information and a parts list for the TPA0202 evaluation module Topic Page Precautions The TPA0202 Audio Power Amplifier Evaluation Module Using the TPA0202 EVM With the Plug N Play Evaluation Platform Using The TPA0202 EVM Stand Alone 0202 Audio Power Amplifier Evaluation Module Parts List 3 18 3 1 Precautions 3 1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external power connected to Vcc power input connector J1 J2 and or Vpp power input connector J6 are correct Overvoltage or reverse polarity power applied to these terminals can open on board soldered in fuses and cause other damage to the platform installed evaluatio
27. pical for the 0202 EVM and will cause the 0202 to switch to single ended output mode when a plug Is inserted into platform headphone jack J10 Table 2 1 Typical TI Plug N Play Platform Jumper and Switch Settings for the 0202 Notes 1 X Don t care 2 Set S2 to ON when signal conditioning board is installed in U1 set S2 to OFF when no signal conditioning board is installed Table 2 2 Typical TPA0202 EVM Jumper Settings s 55 5 so se Note 58 should remain OFF at all times shunt installed OFF open 21 Precautions 2 2 Quick Start List for Platform 23 Quick Start List for Stand Alone 2 1 Precautions 2 1 Precautions Power Supply Input Polarity and Maximum Voltage Always ensure that the polarity and voltage of the external power connected to Vcc power input connector J1 J2 and or Vpp power input connector J6 are correct Overvoltage or reverse polarity power applied to these terminals can open on board soldered in fuses and cause other damage to the platform installed evaluation modules and or the power source Inserting or Removing EVM Boards Do not insert or remove EVM boards with power applied damage to the EVM board the platform or both may result Figure 2 1 Quick Start Platform Map 3 alc OQ OV ooa 55 DC Power In Out Ld e NJ R1 S Sim Audio
28. ption 0202 Stereo 2 W Audio Power Amplifier Evaluation Module is a complete 2 Watt per channel stereo audio power amplifier It consists of the TI TPA0202 Stereo 2 W Audio Power Amplifier IC along with a small number of other parts mounted on a circuit board that measures approximately 21 4 inches by 11 2 inches Figure 1 1 Figure 1 1 The TI 0202 Audio Amplifier Evaluation Module cB RU RVDD O GND e O GND C11 55 GND O Co R8 29 ROUT ORIN cg no ss En E C O GND ES H L H co 94 SE BTL O TPA0202 SAMPLE EVM L R12 Lit SLOP202 S7 ss Di ra O GND C4 C5 il S1 LOUT O GND uem OLHP co c12 5 GND O LVDD Q LOUT Single in line header pins extend from the underside of the module circuit board to allow the EVM to be plugged into the TI Plug N Play Audio Amplifier Evaluation Platform or to be wired directly into existing circuits and equipment when used stand alone The platform has room for a single 0202 evaluation module and is a convenient vehicle for demonstrating Tl s audio power amplifier and related evaluation modules The EVMs simply plug into the platform which automatically provides power to the modules interconnects them correctly and connects them to a versatile array of standard audio input and output jacks and connectors Easy to use configuration controls allow the
29. res 0202 Stereo 2 W Audio Power Amplifier Evaluation Module Internal depop circuitry to eliminate turn on transients in outputs Dual channel bridge tied load BTL or single ended operation 3 3 V and 5 V operation 2 W per channel output power into 3 at 5 V BTL 850 mW per channel output power into 3 Q at 3 3 V BIL Ultra low current consumption in shutdown mute mode 5 Internal input MUX selects among two sets of stereo inputs Module gain adjustable between approximately 2 and 22 Quick and Easy Configuration with The TI Plug N Play Audio Amplifier Evaluation Platform Evaluation module is designed to simply plug into the platform automatically making all signal control and power connections Platform provides flexible power options Jumpers on the platform select power and module control options Switches on the platform route signals Platform provides quick and easy audio input and output connections Platform Power Options External 5 V 15 V DC Vcc supply inputs External regulated Vpp supply input Socket for on board 5 V 3 3 V Vpp voltage regulator EVM On board overvoltage and reverse polarity power protection Platform Audio Input and Output Connections Left and right RCA phono jack inputs Miniature stereo phone jack input Left and right RCA phono jack outputs Left and right compression speaker terminal outputs Miniature stereo headphone jack output Introduction 1 2 Description Descri
30. rning potential risk applications should be directed to TI through a local SC sales office In order to minimize risks associated with the customer s applications adequate design and operating safeguards should be provided by the customer to minimize inherent or procedural hazards assumes no liability for applications assistance customer product design software performance or infringement of patents or services described herein Nor does TI warrant or represent that any license either express or implied is granted under any patent right copyright mask work right or other intellectual property right of TI covering or relating to any combination machine or process in which such semiconductor products or services might be or are used Copyright 1998 Texas Instruments Incorporated Preface Related Documentation From Texas Instruments B TI Plug N Play Audio Amplifier Evaluation Platform literature number SLOUO 11 provides detailed information on the evaluation platform and its use with audio evaluation modules B 7PA0202 STEREO 2 W AUDIO POWER AMPLIFIER literature number SLOS205 This is the data sheet for the 0202 audio amplifier integrated circuit FCC Warning This equipment is intended for use in a laboratory test environment only It generates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC
31. rules which are designed to provide reasonable protection against radio frequency interference Operation of this equipment in other environments may cause interference with radio communications in which case the user at his own expense will be required to take whatever measures may be required to correct this interference Trademarks Tl is a trademark of Texas Instruments Incorporated If You Need Assistance If You Need Assistance If you want to Request more information about Texas Instruments mixed signal products Order Texas Instruments docu mentation Ask questions about product op eration or report suspected prob lems Report mistakes in this document or any other TI documentation Do this Call the PICT hotline 972 644 5580 Or send a fax to the PIC 972 480 7800 Or write to Texas Instruments Incorporated Product Information Center MS 3123 P O Box 660246 Dallas Texas 75266 Call the PICT hotline 972 644 5580 Call the PICT hotline 972 644 5580 Send a fax to MSP Marketing Documentation Correction 972 480 3160 Or send your comments to Texas Instruments Incorporated MSP Marketing Documentation MS 8710 P O Box 660199 Dallas Texas 75266 0199 T Texas Instruments Product Information Center 1 Contents INWOGUCHON 6 ceca EE EE E E OL TU 1 1 hl Feature Highlights aedis dra qoo ROS dE dd ciate Uca 1 2
32. single ended SE output mode When the mode control inputis tied to GND the module operates in the BTL output mode When this input is tied to Vpp the module operates in the single ended output mode In the typical application output mode switching allows the 0202 to operate in the BTL output mode for increased power to internal speakers and then switch to single ended mode to drive headphones when a plug is inserted into the headphone jack 3 3 4 1 Headphone Jack Control Signals The platform headphone output jack J10 contains an internal switch that changes the state of a pair of control lines when a plug is inserted Figure 3 6 Each control line is pulled down by a 1 resistor to ground R4 and R5 The switch in the headphone jack pulls one line or the other up to Vpp through a 240 0 resistor R3 depending on whether a plug is inserted in J10 or not Figure 3 7 Mute Mode and Polarity Control 3 12 VDD R3 240 Polarity JP8 J10 U2 Power Jack Amplifier Hi R5 SPK 1kQ 02 04 Details Using The TPA0202 EVM With the Plug N Play Evaluation Platform 3 3 4 2 Mute Mode Select JP6 A 3 pin jumper header JP6 on the platform functioning as an SPDT switch routes the control signal from the headphone jack to either the mute control input pin or the mode control input pin of the evaluation module To mute the TPA0202 amplifier module using the con
33. the TPA0202 amplifier IC data sheet TI Literature Number SLOS205 3 2 2 Depop Circuitry The 0202 amplifier IC contains internal circuitry to minimize the various turn on transients that might appear at the output during the transition from power off shutdown or mute to normal operation Output turn on transients can be virtually eliminated by sequencing the control inputs to the IC such that the TPA0202 amplifier is held in the single ended output mode for a short time after the mute control pin is released see paragraph 3 3 2 7 3 2 3 BTL Operation To operate in the bridge tied load output mode the module SE BTL control input terminal must be held low The module output signal from OUT must go through the speaker load and be returned directly to OUT and NOTto system ground This requires that the OUT line be isolated not only from system ground but also from the OUT lines of any other amplifiers in the system The platform provides such isolated output lines from the amplifier EVM sockets directly to separate left and right speaker connectors Details 3 5 The TPA0202 Audio Power Amplifier Evaluation Module 3 2 4 SIngle Ended Operation 3 2 5 3 6 For single ended operation the module SE BTL control input pin must be held high The speaker or headphone load is connected to the module OUT Output pin through a coupling capacitor and to platform system ground A 470 uF electrolytic coupling capacitor is provided o
34. tion circuit on the Vpp line will trip L Vcc voltage applied to the plattorm MUST NOT exceed the maximum voltage input specified for the voltage regulator module installed in socket U6 12 V for the SLVP097 or damage to the voltage regulator module may result In no case should Vcc voltage applied to the platform exceed 15 V or the overvoltage protection circuit on the bus will trip Details Inputs and Outputs 3 3 6 Inputs and Outputs 3 3 6 1 Inputs 3 3 6 2 Outputs The TI Plug N Play Audio Amplifier Evaluation Platform is equipped with several standard conectors for audio inputs and outputs In most cases audio signals enter the platform through either a pair of RCA phono jacks J3 and J5 or a miniature 1 8 stereo phone jack J4 Certain signal conditioning and amplifier EVMs however may have additional signal input connectors mounted on the module circuit board The platform audio signal input jacks J3 J4 and J5 are of the closed circuit type grounding the signal input lines when no plugs are inserted Amplified audio output signals leave the platform through left and right RCA phono jacks J7 and J9 left and right pairs of compression connectors for stripped speaker wires J8 and optionally through a miniature 1 8 stereo phone jack J10 for headphones The audio output lines from the power amplifiers are separate all the way to the edge of the platform output jacks J7 J8 and J9 the
35. to sockets on the platform The EVM pins and the platform sockets are keyed such that only the correct type of EVM can be installed in a particular socket and then only with the proper orientation Evaluation modules are easily removed from the platform by simply prying them up and lifting them out of their sockets Care must be taken however to prevent bending the pins 3 3 1 1 EVM Insertion 1 Remove all power from the evaluation platform 2 Locate socket U2 on the platform 3 Orient the module correctly 4 Carefully align the pins of the module with the socket pin receptacles 5 Gently press the module into place 6 Check to be sure that all pins are seated properly and that none are bent Over 3 3 1 2 EVM Removal 1 Remove all power from the evaluation platform 2 Using an appropriate tool as a lever gently pry up one side of the module a small amount 3 Changeto the opposite side of the module and use the tool to pry that side up a small amount 4 Alternate between sides prying the module up a little more each time to avoid bending the pins until it comes loose from the socket 5 Lift the EVM off of the platform Details 3 7 Using The TPA0202 EVM With the Plug N Play Evaluation Platform 3 3 2 0202 Module Jumper Settings and Switches The 0202 EVM is equipped with several pushbutton SPST switches and jumpers that act as SPST switches to allow module operation to be modified to suit various requ
36. trol signal from the platform headphone jack jumper JP6 to MUTE B To switch the output mode of the TPA0202 amplifier between BTL and single ended using the control signal from the platform headphone jack jumper JP6 to MODE 3 3 4 3 Mute Mode Polarity Select JP8 A second 3 pin jumper header JP8 on the platform selects the control signal polarity by connecting either the active high or the active low line from the headphone jack to jumper JP6 When JP6 is set to Mute use the following JP8 settings for the 0202 lomutethe TPA0202 amplifier module when a plug is inserted into the headphone jack jumper 8 to Hi this is the typical setting B mute the TPA0202 amplifier module plug is inserted into the headphone jack jumper 8 to Lo When JP6 is set to Mode use the following JP8 settings for the 0202 To switch the TPA0202 amplifier module to the single ended output mode when a plug is inserted into the headphone jack jumper JP8 to Hi this is the typical setting B Toswitch the TPA0202 amplifier module to the BTL output mode when a plug is inserted into the headphone jack jumper 8 to Lo Details 3 13 Power Requirements 3 3 5 Power Requirements 3 14 The 0202 Audio Power Amplifier Evaluation Module can operate from any voltage between approximately 3 V and 5 5 V however the TPA0202 amplifier IC on the module is characterized for operation at 3 3 V and 5 V For
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