IRPLDIM4E User Manual - International Rectifier
Contents
1. 50 kS s Nm NDO 3 lt lt lt lt DC 4 DC 1 10ky DC STOPPED ONE Figure 10 1 Lamp non strike CH1 is the VCO voltage CH4 is the voltage across lamp AC Mains Interrupt Brown Out Conditions This protection relies on the non ZVS circuit of IRS2530D enabled in the Dim Mode During an AC mains interrupt or brown out condition the DC bus can decrease and cause the system to operate too close to or on the capacitive side of resonance The result is non ZVS switching that causes high peak currents to flow in the half bridge MOSFETs that can damage or destroy them To protect against this the IRS2530D will detect non ZVS by measuring the VS voltage at each rising edge of LO If the voltage is greater than VZVSTH 4 5V typical the IC will reduce the voltage at VCO pin and thus increase the frequency until ZVS is reached again Figure 10 2 www irf com RD0801 40x International REFERENCE DESIGN TOR Rectifier In case the DC bus decreases too far and the lamp extinguishes the VCC voltage will go below VCCUV 10 5V typical and the ignition preheat ramp will be reset to re ignite the lamp reliably 20 Nov 87 RETEST 20 ms la v 210 V 3 20 mv DD 1 DC 2 96 V 4 2 V DC STOPPED 1 MS s Figure 10 2 Brown out conditions CH1 is the VCO voltage CH2 is the VS voltage Lamp Removal2. Fault Protection Ballast Restart Operation Brown out Non ZVS Increase Line voltage frequency increase Upper filament broken Crest Factor Over Current Deactivates Lamp exchange Lower filament broken Crest Factor Over Current Deactivates Lamp exchange Lamp removed Crest Factor Over Current Deactivates Lamp inserted Failure to ignite VVCOFLT Deactivates Lamp exchange No lamp VLOSD Does not Lamp inserted start End of life Crest Factor Over Current Deactivates Lamp exchange www irf com RD0801 TABLE 4 1 Fault Protections Characteristics International REFERENCE DESIGN TER Rectifier 5 IRS2530D DIM8 Ballast Control IC The IRS2530D is an application specific solution for dimming CFL and TL lamps in CFL or matchbox small size ballasts applications It integrates all of the necessary functions for preheat ignition and dimming control of the lamp plus lamp fault protection low AC line protection lamp exchange auto restart and a 600V half bridge driver into a standard SO8 or DIP8 package The IRS2530D includes adaptive zero voltage switching non zero voltage switching ZVS protection as well as an integrated 600V bootstrap MOSFET The heart of this IC is a voltage controlled oscillator VCO with a dimming reference feedback input One of the biggest advantages of the IRS2530D is that it uses the VS pin the mid point of the half bridge for over current protection and to
3. When the lamp is removed the IRS2530D uses the Crest Factor Over current Protection to enter the Fault mode and shut down During lamp removal the output stage will transition to a series LC configuration and the frequency will move towards resonance until the inductor saturates The IRS2530D uses the VS sensing circuitry and the RDSon of the low side half bridge MOSFET to measure the MOSFET current for detecting an over current fault Should the peak current exceed the average current by a factor of 5 5 CF gt 5 5 during the on time of LO the IRS2530D will enter Fault Mode where the half bridge is off Performing crest factor measurement provides a relative current measurement that cancels temperature and or tolerance variations of the RDSon of the low side half bridge MOSFET Figure 10 3 shows the voltage across the lamp and the VS voltage when the lower filament of the lamp is removed Figure 10 4 shows these voltages when the upper filament of the lamp is removed In both cases the IRS2530D will enter the Fault Mode and shut down after detecting that the crest factor exceeds 5 during the on time of LO Figure 10 5 shows the VS pin inductor current and voltage across lamp when the inductor saturates and the ballast shuts down www irf com RD0801 11 international TOR Rectifier 20 Nov 07 11 32 27 5 ms 1 00 ky 5 MS s lt oa x EX EX 1 10 28 mv DC FT 4 DC 1 BB
4. RLMP2 Digikey Panasonic RHM430FCT ND MCR18EZHF4300 Resistor 430 Ohm 1 1206 RMIN Digikey Panasonic P200KFCT ND ERJ 8ENF2003V Resistor 200K 1 1206 RMAX Digikey Panasonic P1 0KALCT ND ERJ P08J102V Resistor 1K 1206 RFB Digikey Yageo 311 1 5KERCT ND RC1206JR 071K5L Resistor 1 5K 1206 RVCO Digikey Panasonic P10ECT ND ERJ 8GEYJ100V Resistor 10 Ohm 1206 RHO RLO Digikey Bourns 3386P 103LF ND 3386P 1 103LF Pot 10K Single turn PDIM Digikey Diodes Inc LL4148DICT ND Diode 1N4148 SMT DL35 DCP2 Digikey Diodes Inc ZMM5248BDICT ND ZMM2548B 7 Zener Diode 18V 500mV SMT DCP1 Wire Jumper J1 WAGO 235 202 Connector 2 terminal X1 WAGO 235 204 Connector 4 terminal X2 IR IRPLDIM4E PCB Single Layer TABLE 8 1 IRPLDIM4E Bill of Materials Lamp type Spiral CFL 26W Line Input Voltage 200 250 VAC Note Different lamp types may require components with different values voltage ratings and or current ratings www irf com RD0801 International TER Rectifier 9 Functional Description When power is turned on the IRS2530D first starts in Under Voltage Lockout UVLO mode The UVLO mode is designed to maintain an ultra low lt 250yuA supply current and to guarantee that the IC is fully functional before the high and low side output HO and LO gate driver
5. detect non ZVS conditions The IRS2530D uses the RDSon of the low side half bridge MOSFET for current sensing each cycle when the low side MOSFET is on An internal 600V MOSFET connects the VS pin to the VS sensing circuitry and allows for the VS pin to be accurately measured during the time when pin LO is high while withstanding the high DC bus voltage during the other portion of the switching cycle when the high side MOSFET is turned on This eliminates the need for an external precision current sensing resistor that is typically used to detect over current Please refer to the IRS2530D datasheet for further information including electrical parameters a state diagram and a complete functional description As a result of the IRS2530D features the IRPLDIM4E Reference Design is a complete dimming ballast solution that includes lamp fault protection low AC line protection lamp exchange auto restart and reduces component count and ballast size 6 Circuit Description The schematic for IRPLDIM4E is shown in Figure 7 1 The bill of materials with the component values is shown in Table 8 1 The ballast incorporates a fuse input rectifier EMI filter bus capacitor half bridge dimming control and output stage The output stage is a series L parallel RC resonant circuit consisting of an inductor LRES capacitor CRES and lamp The AC line input voltage is rectified to provide a bus voltage of approximately 300VDC The start up resistors R
6. 0 26 kV J V mx STOPPED Figure 10 6 Lamp exchange CH1 is the LO voltage CH2 is the VS voltage and CH4 is the voltage across the lamp www irf com RD0801 13 International REFERENCE DESIGN TER Rectifier 11 PCB Layout and Component Placement www irf com RD0801 14 International TOR Rectifier 49he U33 425 JIS Wo jog www irf com RD0801 15 International TOR Rectifier Url Z2Z0ZII 3 WIQ 1d I UJ O rr O C O U U D x U L D RD0801 International TER Rectifier 12 Inductor Specifications Vogt IL 070 503 11 02 BI Technologies HM00 07544 INDUCTOR SPECIFICATION IR CORE SIZE E20 10 6 EF20 CORE MATERIAL Philips3C85 Siemens N27 or equivalent NOMINAL INDUCTANCE 2 3 mH TEST TEMPERATURE 100 cc WINDING START PINFINISH PIN TURNS MAIN CATHODE WIRE DIAMETER mm 240 10 38 Multistranded 26 awg insulated CATHODE 26 awg insulated PHYSICAL LAYOUT Vertical6 Pin Bobbir _TEST TEST TEMPERATURE C MAIN WINDING urin mH MAX24 Adjust turns for specified Inductance www irf com RD0801 17
7. International REFERENCE DESIGN TER Rectifier IRPLDIM4E Miniature Dimmable 26W Ballast Using IRS2530D DIM8 Control IC Table of Contents Page Te CPST NOY incited tit ist a ak 2 PA AA AA AA 2 3 Electrical Characteristics 3 4 Fault Protection Characteristics 3 5 IRS2530D DIM8 Ballast Control IC 4 6 Circuit Description aaa GAGA AABANG 4 T Circuit SchematleS AAP 5 8 E17 Materials uuu uu an a ete nee ene 6 9 Functional Description 7 10 Pauli COnNdiNON S ss annees 10 11 PCB Layout and Component Placement 14 12 Inductor Specifications 17 www irf com RDO801 1 International REFERENCE DESIGN TOR Rectifier 1 Overview The IRPLDIM4E Reference Design is a miniature dimmable electronic ballast for driving 26W compact fluorescent lamps from a 220VAC line The circuit provides all of the necessary functions for preheat ignition and dimming control of the lamp and also includes the EMI filter and AC rectification stage The ballast size is 1 42in x 2 44in 36mm x 62mm The circuit is designed around the IRS2530D S PbF D M8 Ballast Control IC The IRS2530D includes adjustable preheat time frequenc
8. VCC1 and RVCC2 are sized such that they supply the micro power current during under voltage lockout UVLO mode and determine the AC line voltage where the ballast turns on When VCC exceeds the startup threshold VCCUV the IRS2530D begins to oscillate and the charge pump circuit CVS DCP1 and DCP2 supplies the current to VCC while maintaining the internal VCC zener clamp at 15 6V The IRS2530D controls the frequency of the half bridge for satisfying the lamp operating modes These include lamp preheat lamp ignition dimming low AC line protection and lamp ballast fault protection www irf com RD0801 4 International REFERENCE DESIGN TER Rectifier 7 Circuit Schematic yndu Buiuutuidq 49 9W01 U9 Oq yndu u OV A0Z 2 JF z 2 AW W W m q0gS Stlil o lo Li lo 5 8 8 s2 o so Ld Ta SIN SHW Zd TY z zdoa s349 SAO 309 V S341 SOY O O o IHO 8 s331 w Figure 7 1 IRPLDIM4E Circuit Schematic www irf com RD0801 5 International TER Rectifier 8 Bill of Materials REFERENCE DESIGN Manufacturer Digikey Diodes Inc Item Qty Part Number RHO6DICT ND RHO6 T Description Bridge Rectifier 600V 0 5A MiniDip Reference Digikey Vishay PPC 47BCT ND NFR25H0004707JR500 Resistor 0 47R 1 2W F1 Digikey Epcos M8301 ND 5800 102 RC RF Chokes 1mH 200mA LF Wima MKS2 Se
9. kV 2 U STOPPED lt O gx Figure 10 3 Lower filament removed CH2 is the VS voltage CH4 is the voltage across the lamp 20 Nov 07 11 39 08 10 ms 1 00 ky 10 ms 1 1 V Dy 10 V OC 2 5 MS s 20 mV DC _ 4 DC 1 38kV 4 2 V DC STOPPED Figure 10 4 Upper filament removed CH2 is the VS voltage CH4 is the voltage across the lamp www irf com RD0801 12 International REFERENCE DESIGN TOR Rectifier 19 Dec 07 Reading Floppy Disk Drive 15 21 33 il LeCroy 18 ps r ha KI 10 ps 3 100 V 2 HiH 19 ps a en 2 50 ky E pn Mm H I fl 500 MS s 4 DC 1 25ky STOPPED Figure 10 5 Inductor saturation CH1 is the LO voltage CH2 is the VS voltage CH3 is the current through the resonant inductor and CH4 is the voltage across the lamp Figure 10 6 shows the VS voltage and the voltage across the lamp when the IC undergoes reset with a lamp exchange When the lamp is removed crest factor protection is triggered and the IC enters the Fault mode and shuts down Since the lamp is removed LO pins is pulled above VLOSD and the IC goes to UVLO mode When the lamp is re inserted the IC goes back to the Preheat Ignition mode and the half bridge starts to oscillate again 28 Dec 07 19 47 49 2 s BWL 1 i 9 DC 3 8 V DC 100 kS s 5 V D i 4 DC
10. ng level waveforms CH1 is the DIM voltage CH2 is the voltage at VS pin and CH4 is the VCO voltage 16 Nov 07 16 06 32 10 ps 0 50 V 10 ps 198 V 10 ps 1 00 V BIBIB Freg 2 Rm 66 5682 kHz 10 ps 1 59 mv DC F 19 v OC 500 MS s 50 mv DC a 2 DC 120 V O v OC STOPPED Figure 9 5 10 dimming level waveforms CH1 is the DIM voltage CH2 is the voltage at VS pin and CH4 is the VCO voltage www irf com RD0801 9 Internotionol REFERENCE DESIGN TOR Rectifier 10 Fault Conditions In case of fault conditions such as open filaments failure to strike or lamp removal the IRS2530D will go into Fault Mode In this mode the internal fault latch is set HO is off LO is open circuit and the IRS2530D consumes an ultra low micro power current The IRS2530D can be reset with a lamp exchange as detected by the LO pin or a recycling of VCC below and back above the UVLO thresholds Failure to Strike At initial turn on of the ballast the frequency will ramp down from fmax toward the resonance frequency When the lamp fails to strike the VCO voltage continues to increase and the frequency continues to decrease until the VCO voltage exceeds VVCOFLT 4 0V typical and the IRS2530D enters Fault Mode and shuts down Figure 10 1 It should be noted that in case of failure to strike the system will operate in capacitive side of resonance but only for short period of time 19 Nov 87 18 30 20 LeCroy
11. on and Dim mode for 100 dimming level Figure 9 3 shows these waveforms for 10 dimming level 19 Nov 87 16 24 36 P 2 2 00 V 2 s BWL V DC V DC V DC V DC LeCrou oe s 100 kS s 4 DC 0 275 ky STOPPED Figure 9 2 Preheat Ignition and Dim mode for 100 dimming level CH1 is the VCO voltage CH3 is the lamp current and CH4 is the voltage across the lamp 19 Nov 07 16 36 29 250 V DC DC DC DC ONE lt lt lt lt Ex Sx Sx Sx 40 188 kS s C 0 275ky STOPPED Figure 9 3 Preheat Ignition and Dim mode for 10 dimming level CH1 is the VCO voltage CH3 is the lamp current and CH4 is the voltage across the lamp www irf com RD0801 8 International REFERENCE DESIGN TER Rectifier Figure 9 4 shows the voltage at the DIM pin the VS half bridge voltage and the voltage at the VCO pin during Dim Mode for 100 dimming level Figure 9 5 shows these voltages for 10 dimming level 16 Nov 07 16 00 36 Croy 18 ps 1 00 V 10 ps 100 V BIB 10 ps 1 00 V gt Freg 2 nn 38 5932 kHz 10 ps A V DC 10 V DC 50 my DC 1 V DC 500 MS s 2 DC 120 V x Zx Ex Ex wot STOPPED Figure 9 4 100 dimmi
12. ries Capacitor 47nF 400V CF CDC Digikey Panasonic P5931 ND EEU EB2V100 Capacitor 10uF 350VDC 105C CBUS Digikey Panasonic PCC104BCT ND ECJ 3VB1H104K Capacitor 0 1uF 50V 1206 CBS CFB Digikey Panasonic PCC1886CT ND ECJ 3VB1E184K Capacitor 0 18uF 25V 1206 CH1 CH2 Digikey Yageo 311 1171 1 ND CC1206KRX7R9BB222 Capacitor 2 2nF 50V 1206 CVCO Digikey Panasonic PCC1892CT ND ECJ 3YBIE684K Capacitor 0 68UF 25V 1206 CPH Digikey Panasonic PCC1882CT ND ECJ 3YB1C105K Capacitor 1UF 16V 1206 CVCC Digikey Yageo 311 1174 1 ND CC1206KRX7R9BB 103 Capacitor 10nF 50V 1206 CDIM Digikey Panasonic P9542 ND ECK A3A102KBP Capacitor 1nF 1KV Ceramic disk CVS Wima TAW MKP 10 RM15MM MKP 472K1K6 Polypropylene Capacitor 4 7nF 1 6KV 10 RM 15mm CRES IR IRS2530D Dimming Ballast Control IC IC1 Vogt IR IL 070 503 11 02 Ballast Resonant Inductor EF20 2 3mH LRES Digikey Vishay IRFU320 Transistor MOSFET 400V MHS MLS Digikey Panasonic P360KECT ND ERJ 8GEYJ364V Resistor 360K 1206 RVCC1 RVCC2 Digikey Panasonic PPC7 5W 1CT ND 5073NW7R500J12AFX Resistor 7 5 Ohm 5 1 W Axial RCS Digikey Panasonic P220KECT ND ERJ 8GEYJ224V Resistor 220K 1206 RLMP1 Digikey Panasonic P470KECT ND ERY 8GEYJ474V Resistor 470K 1206
13. s are activated During UVLO HO is low and VCO is pulled down to COM for resetting the starting frequency to the maximum LO is open circuit and is used as a shutdown reset input function for automatically restarting the IC when a lamp has been removed and re inserted Once VCC reaches the startup threshold VCCUV and the LO pin is below VLOSD lamp is inserted the half bridge FETs start to oscillate and the IC enters Preheat Ignition Mode At startup VCO is OV and the frequency starts at fmax The frequency ramps down towards the resonant frequency of the high Q ballast output stage causing the lamp voltage to increase During this time the filaments of the lamp are pre heated to their emission temperature to minimize the necessary ignition voltage and to increase lamp life The voltage on pin VCO continues to increase and the frequency keeps decreasing until the lamp ignites If the lamp ignites successfully the IRS2530D enters the DIM mode The resonant output stage transitions to a series L parallel RC circuit with the Q value and operating point determined by the user dim level Figure 9 1 Vout Vin t fmin f100 f50 f10 fmax Frequency Figure 9 1 Resonant tank Bode plot with lamp dimming operating points www irf com RD0801 Po Internotionol TOR Rectifier REFERENCE DESIGN Figure 9 2 shows the VCO voltage the voltage across the lamp and the current through the lamp during Preheat Igniti
14. y sweeping for filament preheating and lamp ignition a dimming reference and feedback input a high soft start frequency to avoid lamp flash lamp and ballast fault protection for open filament condition failure to strike and no lamp fault conditions automatic restart during lamp exchange and low AC line protection The IRS2530D is simple to use has only 8 pins and drastically reduces component count for a complete dimming solution 2 Features Closed loop dimming control Programmable preheat time Frequency sweep for filament preheat and lamp ignition Open filaments and no lamp protection Failure to strike and deactivated lamp protection Low AC line protection Lamp exchange auto restart Y V V V V V V www irf com RDO801 2 International TER Rectifier 3 Electrical Characteristics REFERENCE DESIGN Parameter Units Dimming Level Value Lamp Type 26W CFL 100 25 Input Power W 10 9 100 180 Input Current mArms 10 78 100 320 Lamp Running Voltage Vpp 10 480 100 271 Lamp Running Current mArms 10 26 Start Frequency kHz 115 100 42 Run Frequency kHz 10 68 Preheat Time s 1 Input AC Voltage Range VACrms 200 250 Ballast turn off voltage VACrms 85 TABLE 3 1 Ballast Parameters t The lamp running voltage at 100 dimming level is not perfectly sinusoidal and has some distortion 4 Fault Protection Characteristics
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