UM10509 - NXP Semiconductors
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1. Some resistor values are shown with format x x x which represent the values required of resistors connected in parallel Demo board 230 V AC schematic L C13 R1 L RGND L2 L1 22nFz 22k0 n D3 BC1 680 pH fer coil 630 V 2W Pl ec D4 100 nF BD1 D1 c2 c3 180 V N 250V no Eod 520 1 HF 3w R34 D6 100 pF 10 KQ L diode04 05 Cg C10 R5 1m dmF IC GND 4 7 KOI2 W ZX Ds N4 N5 35V dd R4 F fi 10 kO 10 KQ 11 kO 2 W R25 22 kQ 22 KQ SGND 0220 R28 0 25 W R3 Q1 a2 ug IC1 10 kQ 11k0 2 W 398 22 kQ 22 kQ Ri E thes crv ier Q3 R23 R24 2 13 LLL R19A 10kQ 8 25 KQ R2 WB_DRV DRAIN R28 n c D11 1 R27 1 5 MO vec 3 12 100 ZD33 nl a VCC PWR_DRV R19 R26 51 KQ GND SOURCE 0 68 Q 10 kQ 5 Aux 19 K co R29 BRIGHTNESS R30 9 R21 D10 6 2kQ 6 nc2 ISENSE 100 kO oQ B RT 8 R31 2 IC4 PWMLMT RE 82k0 7 R22 1kO gt BCM61B C4 7 5kO SSL2103 100 T L 3 R10 Zu 4 128 4 V CIA 3 R2 scwp 12kO EM R12 c5 o 100 pF 619 KQ 100 KQ 330 pF vec Vo 1004 1 N3 16V R20 IC3 A A 1 IKO a E maoyr SGND en p ps A 5V gt 7 E ZD33V 2 R16 100 KQ enu 22nF R13 400 V SPOKO E o a EE I z00n D9 Tn SGND eav A zova NRN HE b RGND pal 1 TAE R14 R15 R17 330 2200 200 100 10 0 10 680 Q 680 Q 680 Q 62 0 62 0 62 Q aaa 001772 Optional 8 oneui2. PWMLIMIT and the output current is quadratic in nature The resulting output current spread is acceptable for most LED applications If higher demands are placed on LED current spread a secondary regulation circuit in combination with an added pure current action control is advisable The dimming range is detected by sensing the average rectified voltage R2 and R10 form a voltage divider and C4 filters the resulting signal The flyback converter sets its duty factor and converter frequency accordingly All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 9 of 17 NXP Semiconductors U M1 0509 230 V AC 17 W dimmable demo board using the SSL2103 7 System optimization The modifications described in this section can be applied to achieve customer application specifications 7 1 Changing output voltage and LED current One of the major advantages of a flyback converter over other topologies is its suitability for driving different output voltages In essence changing the winding ratio while maintaining the value of the primary inductance shifts the output working voltage accordingly Part of the efficiency of the driver is linked to the output voltage A lower output voltage increases the transformation ratio and cause higher secondary losses In practice mains dimmable flyback converters have an efficiency of e 85 for hi
3. efficiency the major serial damping is activated only when there is a peak inrush current active inrush current limiter In normal operation the Darlington transistor Q4 conducts bypassing R15 and lowering ohmic losses When a high inrush current is detected Q4 starts to clip at its maximum current of 500 mA The flyback converter input circuit must have a filter that is partially capacitive C2 L2 C3 C13 and L1 form the filter that blocks most of the disturbance caused by the flyback converter input current The drawback of this filter is a reduced power factor due to the capacitive load A lower flyback converter power relative to the capacitive value of this filter buffer reduces the power factor With the 230 V AC design using 330 nF capacitors a minimum power factor of 0 93 is achieved The demo board has a feedback loop to limit the output current The feedback loop senses the LED current through sense resistor R25 and current mirror circuit with IC4 The current level can be set using R27 and R29 The same feedback loop is also used for overvoltage protection If the LED voltage exceeds 33 V a current starts to flow through R23 and D11 The current through the optocoupler IC3 forces pins PWMLIMIT and BRIGHTNESS LOW At a value below 400 mV the MOSFET on time is zero The feedback loop has a proportional action only The gain is critical because of phase shift caused by the flyback converter and C6 The relationship between pin
4. provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 5 of 17 NXP Semiconductors U M1 0509 230 V AC 17 W dimmable demo board using the SSL2103 4 Demo board connections UM10509 The demo board is optimized for an AC mains source of 230 V at 50 Hz It is designed to work with multiple high power LEDs having a total working voltage of between 18 V and 33 V The output current is set to 600 mA at the typical load The output voltage is limited to 33 V When attaching an LED load to the board hot plugging an inrush peak current occurs due to the discharge of output capacitors C9 and C10 Frequent discharges can damage or deteriorate the LEDs Remark Mount the board in a shielded or isolated box for demonstration purposes dimmer 019aaa550 Fig 3 Demo board connections Place a galvanic isolated transformer between the AC source and the demo board if one is used Connect a series of between 5 and 10 LEDs to the output as shown in Figure 3 All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 6 of 17 NXP Semiconductors UM10509 5 Dimmers 230 V AC 17 W dimmable demo board using the SSL2103 UM10509 NXP Semiconductors has tested the performance of several triac based dimmers havin
5. 30 V AC 17 W dimmable demo board using the SSL2103 Table 1 Demo board specification Parameter AC line input voltage Output voltage LED voltage Output voltage protection Output current LED current Input voltage and load current dependency Output voltage and load current dependency Temperature stability Current ripple Maximum output power LED power Efficiency Power factor Switching frequency Dimming range Board dimensions Operating temperature EMC Compliance Value Comment 210 V AC to 250 V AC 10 96 50 Hz 230 V AC model 17 V DC to 33 V DC 33 V DC 500 mA typical 5 96 to 5 96 between 210 V AC and 250 V AC 10 to 10 96 between 19 V DC to 30 V DC 3 96 to 3 96 from 20 C to 100 C 15 96 at 500 mA typical value 19W depends on load 78 96 to 82 96 20 93 at 230 V AC 40 kHz to 60 kHz at 230 V AC input voltage 100 96 to 0 96 for triac dimmers 82 mm x 62 mm x 35 mm LxBxH 0 C to 105 C FCC15 and IEC 61000 3 2 pre compliant EN 55015 and IEC 61000 3 2 pre compliant UM10509 All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 4 of 17 NXP Semiconductors U M1 0509 230 V AC 17 W dimmable demo board using the SSL2103 a Top view b Bottom view Fig 2 17 W PAR38 LED demo board UM10509 All information
6. 8 2 kQ 0805 R12 R21 2 100 kQ 0805 UM10509 All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 13 of 17 NXP Semiconductors U M1 0509 230 V AC 17 W dimmable demo board using the SSL2103 Table 3 Demo board 230 V AC components continued Reference Quantity Description Part manufacturer Comment R13 1 RT3 5MM 2W20 390 kQ R14 1 R POWER 3 3 Q 10 0 10 0 10 Q R15 1 R POWER 220 Q 680 0 680 9 680 9 R16 1 100 kQ 0805 R17 1 R POWER 20 Q 62 9 62 0 62 Q R18 1 18 kQ 0805 z R19 1 0 68 Q 1206 R19A 1 NC 1206 R20 1 1 kQ 0805 R22 1 10 kQ 0805 tuned on LED Aux voltage R23 R26 2 10 kQ 0603 x R24 1 8 25 kO 1 96 0603 R25 1 RT3 5MM 0 22 Q 0 25 W R27 1 51 kQ 0603 R28 1 10 0 0805 R29 1 6 2 kQ 0603 5 R30 1 0 9 0603 R31 1 1 KQ 0603 R32 1 619 Q 1 96 0603 R33 R34 2 10 kQ 0805 8 TX1 1 EFD25 DIP UM10509 All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 14 of 17 NXP Semiconductors UM10509 10 Test results 230 V AC 17 W dimmable demo board using the SSL2103 UM10509 10 1 Input output stability Table 4 Input and output stability test results Parameter Conditions Vin AC mains vol
7. UM10509 230 V AC 17 W dimmable demo board using the SSL2103 Rev 1 16 January 2012 User manual Document information Info Content Keywords SSL2103 AC mains supply dimmable LED driver AC DC conversion Abstract This user manual describes a demo board for evaluating an AC mains LED driver with a dimmer for 17 W PAR38 LEDs using the SSL2103 It also describes key features and connections to aid the design of LED drivers for typical applications NXP Semiconductors U M1 0509 230 V AC 17 W dimmable demo board using the SSL2103 Revision history Rev Date Description v 1 20120116 first issue Contact information For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com UM10509 All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 2 of 17 NXP Semiconductors U M1 0509 230 V AC 17 W dimmable demo board using the SSL2103 1 Introduction WARNING Lethal voltage and fire ignition hazard The non insulated high voltages that are present when operating this product constitute a risk of electric shock personal injury death and or ignition of fire This product is intended for evaluation purposes only It shall be operated in a designated test area by personnel qualified according to local requirements and labor law
8. ained In addition add a damper to reduce the inrush current and dissipate the electric power stored in the dimmer LC filter A serial resistor is used as a damper at power ranges of less than 10 W However a serial resistor is inefficient at higher power ranges The inefficiency is due to the significant voltage drop and dissipation that occurs from the supply current to the flyback converter The Darlington transistor Q4 provides the necessary high gain Q4 is saturated while its base voltage is higher than the emitter voltage plus the base emitter voltage Vgg The voltage across emitter resistor R14 increases with the current When the emitter voltage rises above the threshold Q4 stops saturation turns off and R15 limits the current Choose the values of D9 and R13 with care to ensure consistent operation A Darlington transistor provides the necessary high current gain This modification changes the specifications of efficiency and power factor All information provided in this document is subject to legal disclaimers NXP B V 2012 AII rights reserved User manual Rev 1 16 January 2012 8 of 17 NXP Semiconductors U M1 0509 UM10509 230 V AC 17 W dimmable demo board using the SSL2103 A combination of serial resistance and a parallel damper is chosen The serial resistance comprises R14 R15 and R17 The parallel group damper comprises C1 C13 and R1 in parallel with C8 and R7 for optional fine tuning To improve
9. auos pJeoq ow q 0L21SS 94 Buisn pueog owap ajqewwip M ZL OV A OEZ 60S0 LNN SJOJONPUODIWISS dXN NXP Semiconductors U M1 0509 230 V AC 17 W dimmable demo board using the SSL2103 9 PCB components Table 3 Demo board 230 V AC components Reference Quantity Description Part manufacturer Comment BD1 1 BD DB107S C1 1 100 nF 250 V CM150 5 6X12 C2 C3 2 0 1 uF 0 1 pF 400 V CM150 5 6X18 C4 1 4 7 uF 50 V CAL04 5 C5 1 330 pF 0805 C6 1 100 nF 63 V CAL04 5 C7 1 1 nF 0805 C8 1 10 uF 50 V 1206 C9 C10 2 1 mF 35 V ECOUT C11 1 2 2 nF 400 V AC C POLY C12 1 100 pF 16 V CAL04 5 C13 1 2 2 nF 630 V CM150 5 6X12 D3 1 ultra fast diode 02 10 axial lead D4 1 diode DIP 180 V 3 W D5 D6 2 switching diode DIP 2 D7 1 switching diode SO8 SMD D8 1 Zener diode 33 V ZD33V 5 D9 1 Zener diode 4 3 V SOD80 ZD 4V3 D10 1 diode SOD80 D11 1 Zener diode 33 V ZD33V IC1 1 LED driver dimmer IC SSL2103 NXP Semiconductors IC3 1 IC04 10 PC LTV 817B Lite On IC4 1 BCM61B L1 1 FERCHOCK Ferrite Coil L2 1 L DIP 680 uH L3 1 WECHOCK 2 100 uH Q1 Q2 2 NPN transistor TO92 Q3 1 MOSFET TO251 Q4 1 NPN transistor ST901T R1 1 R POWER 2 2 k0 2 W R2 1 1 5 MO 1206 A R3 R4 2 R POWER 11 kQ 2 W 22k0 22kO R5 1 R POWER 4 7 KQO 2 W 10 KO 10kO R6 1 7 5 KQ 0805 R8 R9 2 3 9 kQ 0805 R10 1 12 kQ 0805 7 R11 1
10. e next cycle the energy stored in the transformer discharges via D6 to output capacitors C9 and C10 The load absorbs the energy The external RC components connected to pins RC and RC2 control the internal oscillator timing These external components set the flyback converter frequency The upper and lower frequency values are set using the BRIGHTNESS pin The ratio between R11 and R12 sets flyback converter frequency range The two other switches in the IC are called weak bleeder pin WB DRV and strong bleeder pin SB DRV When the voltage on these pins is below a certain value typically 52 V the strong bleeder switches on A path is provided for the load current to the dimmer during zero voltage crossing The dimmer timer is reset When the voltage on the pins is above 52 V and the voltage on pin ISENSE 100 mV transistor Q3 switches the weak bleeder on The weak bleeder supplies a boosted hold current to the dimmer to maintain stable latching when the flyback converter draws insufficient current Figure 4 shows the bleeder voltage against time in dimmed and undimmed modes The demo board is optimized to work at a power factor above 0 9 The flyback converter operates during the MOSFET on time Capacitors C9 and C10 buffer the flyback converter output power This configuration gives the circuit a resistive input current behavior in undimmed mode see curve l in Figure 4 In dimmed mode the dimmer latch and hold current must be maint
11. e possibility of such damages Notwithstanding any damages that customer might incur for any reason whatsoever including without limitation all damages referenced above and all direct or general damages the entire liability of NXP Semiconductors its affiliates and their suppliers and customer s exclusive remedy for all of the foregoing shall be limited to actual damages incurred by customer based on reasonable reliance up to the greater of the amount actually paid by customer for the product or five dollars US 5 00 The foregoing limitations exclusions and disclaimers shall apply to the maximum extent permitted by applicable law even if any remedy fails of its essential purpose 11 3 Trademarks Notice All referenced brands product names service names and trademarks are the property of their respective owners NXP B V 2012 AII rights reserved User manual Rev 1 16 January 2012 16 of 17 NXP Semiconductors U M1 0509 230 V AC 17 W dimmable demo board using the SSL2103 12 Contents 1 Introduction eee eee 3 2 Safety Warning esesesesee 3 3 Specification elles 4 4 Demo board connections 6 5 Dimimers 2 2 lc e mes 7 6 Functional description 8 7 System optimization 10 7 1 Changing output voltage and LED current 10 7 2 Changing the output ripple current 10 7 8 Adapting to high power re
12. e voltage drop in some transistor dimmers is not sufficient for full control of the dimming range The SSL2103 senses the dimming range by taking the average rectified voltage as input To compensate for the reduced voltage difference the voltage detection can be made more sensitive by placing a Zener diode in series with R2 The dimming curve is steeper and shifted when using triac dimmers because of increased sensitivity Changing the output current The output current can be set initially by varying the values of R29 and R27 The power section and transformer train can withstand output currents up to 500 mA but losses increase at higher current levels Resistors R19 R19A limit the primary peak current and consequently the maximum output power All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 11 of 17 jenuew Jes zLOZ Avenuer 9 Ady sieuirejosip 269 0 joefqns s jueuinoop siu ui pepi oid uoneuuojul y ZL Jo CI 60SOLWN paniasad suu Iv ZLOZ A 8 dXN GO 1 Fig 4
13. eserved User manual Rev 1 16 January 2012 10 of 17 NXP Semiconductors UM10509 UM10509 7 3 7 4 230 V AC 17 W dimmable demo board using the SSL2103 Adapting to high power reverse phase transistor dimmers Reverse phase transistor dimmers differ in two ways that can be beneficial Due to the negative phase there is no inrush current when the dimmer triggers Using triac dimmers there is a sudden voltage difference over the input resulting in a steep charge of the input capacitors The resulting peak current results in higher damper dissipation Using transistor dimmers the steep charge is missing The input capacitors are less stressed and the input circuit is less prone to audible noise e Transistor dimmers contain active circuitry that requires a load charge while the dimmer is open To avoid internal dimmer losses the dimensioning of the internal supply voltage generation circuit is critical This means that the remaining voltage drop across the lamp must be low enough to allow this charge to be reached The minimum load to achieve such a low voltage drop results in inefficient operation at low output power levels The cause of which is that most of the energy is wasted driving the dimmer instead of used to producing light The weak bleeder resistor values of R3 and R4 are chosen to ensure that any losses are within acceptable limits These losses only occur in dimmed mode at the end of the phase Th
14. g different specifications The range of dimmers which have been tested with the demo board are given in Table 2 Table 2 Tested dimmers Manufacturer Part Leading edge dimmers Berker 2819 Berker 2873 Gira 030000 101 Busch Jaeger Elektro 2250U Busch Jaeger Elektro 2200 Clipsal E2032v Legrand V004 Flexalite FL630D Kiny DF 300P 2w Trailing edge dimmers Berker 286710 Berker 2874 Gira 030700 102 Busch Jaeger Elektro 6513 U102 Richmond lighting DG09007 Richmond lighting DG07093 Jung licht management 243E4 Jung licht management 22570E All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 7 of 17 NXP Semiconductors U M1 0509 230 V AC 17 W dimmable demo board using the SSL2103 6 Functional description UM10509 Refer to Figure 4 Demo board 230 V AC schematic on page 12 for more information The AC mains LED driver IC SSL2103 controls and drives a flyback converter circuit and ensures correct dimmer operation The IC has three integrated high voltage switches one of which located between pins DRAIN and SOURCE controls flyback input power When the switch opens current flows and is stored as energy in transformer TX1 The current is interrupted when either e the duty factor exceeds the 75 maximum level set using the PWMLIMIT pin the voltage on the SOURCE pin exceeds 0 5 V In th
15. gher output power and voltage such as 60 V e 60 for lower output power and voltage such as 1 W and 3 V At lower voltages synchronous rectification is advisable to reduce losses after high current is rectified NXP Semiconductors TEA1761 and TEA1791 synchronous rectification controllers are ideal for this purpose Calculations for transformer properties and peak current are described in detail in application note AN10754 SSL2101 and SSL2103 dimmable mains LED driver 7 2 Changing the output ripple current The LED voltage the LED dynamic resistance and the output capacitor determine the output ripple current While the values of C9 and C10 are chosen to optimize capacitor size with light output A ripple of 15 96 results in an expected deterioration of LED brightness of less than 1 95 The size of the buffer capacitor is determined using Equation 1 ied 1 C10 C9 x AI OX f Raus Example A 45 ripple current a 50 Hz AC mains frequency and a 0 6 Q dynamic resistance 20 results in a combined C9 C10 value of Suse 111 mF A ripple current of 25 and a dynamic resistance of 6 Q results in a value for C9 C10 4 2000 uF 300 x 6 H Using a series of LEDs the dynamic resistance of each LED can be added to the total dynamic resistance 1 M Weiland 28 07 2006 UM10509 All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights r
16. rs accept no liability for inclusion and or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and or use is at the customer s own risk Applications Applications that are described herein for any of these products are for illustrative purposes only NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification UM10509 All information provided in this document is subject to legal disclaimers Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products and NXP Semiconductors accepts no liability for any assistance with applications or customer product design It is customer s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer s applications and products planned as well as for the planned application and use of customer s third party customer s Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products NXP Semiconductors does not accept any liability related to any default damage costs or problem which is based on any weakness or default in the customer s applications or products or the application or use by customer s third party customer s Customer is responsible for doing all necessa
17. ry testing for the customer s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer s third party customer s NXP does not accept any liability in this respect Export control This document as well as the item s described herein may be subject to export control regulations Export might require a prior authorization from competent authorities Evaluation products This product is provided on an as is and with all faults basis for evaluation purposes only NXP Semiconductors its affiliates and their suppliers expressly disclaim all warranties whether express implied or statutory including but not limited to the implied warranties of non infringement merchantability and fitness for a particular purpose The entire risk as to the quality or arising out of the use or performance of this product remains with customer In no event shall NXP Semiconductors its affiliates or their suppliers be liable to customer for any special indirect consequential punitive or incidental damages including without limitation damages for loss of business business interruption loss of use loss of data or information and the like arising out the use of or inability to use the product whether or not based on tort including negligence strict liability breach of contract breach of warranty or any other theory even if advised of th
18. s to work with non insulated mains voltages and high voltage circuits This product shall never be operated unattended This user manual describes a demo board for evaluating an AC mains LED driver with a dimmer for 17 W PAR38 LEDs using the SSL2103 It describes key features and connections to aid the design of LED drivers for typical applications The demo board operates from an AC mains voltage of 230 V AC The resulting design is a trade off between high power factor efficiency and dimmer compatibility combined with high output stability and ElectroMagnetic Compatibility EMC compliance 2 Safety Warning The demo board is powered by AC mains voltage Avoid touching the board when power is applied An isolated housing is obligatory when used in uncontrolled non laboratory environments The secondary circuit with LED connection has galvanic isolation however this isolation is not in accordance with any standard and has not been thoroughly tested Always provide galvanic isolation of the mains phase using a variable transformer The following symbols identify isolated and non isolated devices 019aab173 019aab174 a Isolated b Non isolated Fig 1 Isolated and non isolated symbols UM10509 All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 3 of 17 NXP Semiconductors UM10509 3 Specification 2
19. source outside of NXP Semiconductors In no event shall NXP Semiconductors be liable for any indirect incidental punitive special or consequential damages including without limitation lost profits lost savings business interruption costs related to the removal or replacement of any products or rework charges whether or not such damages are based on tort including negligence warranty breach of contract or any other legal theory Notwithstanding any damages that customer might incur for any reason whatsoever NXP Semiconductors aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors Right to make changes NXP Semiconductors reserves the right to make changes to information published in this document including without limitation specifications and product descriptions at any time and without notice This document supersedes and replaces all information supplied prior to the publication hereof Suitability for use NXP Semiconductors products are not designed authorized or warranted to be suitable for use in life support life critical or safety critical systems or equipment nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury death or severe property or environmental damage NXP Semiconductors and its supplie
20. tage 220 input power W 16 176 Power factor 0 962 Vigp V 29 57 ligp A 468 7 Po W 13 836 n 96 85 5 230 17 703 0 953 29 81 509 15 153 85 6 240 18 135 0 945 29 828 520 5 15 507 85 5 250 18 28 0 94 29 82 525 2 15 629 85 5 260 18 419 0 935 29 83 527 6 15 715 85 3 All information provided in this document is subject to legal disclaimers NXP B V 2012 All rights reserved User manual Rev 1 16 January 2012 15 of 17 NXP Semiconductors UM10509 230 V AC 17 W dimmable demo board using the SSL2103 11 Legal information 11 1 Definitions Draft The document is a draft version only The content is still under internal review and subject to formal approval which may result in modifications or additions NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information 11 2 Disclaimers Limited warranty and liability Information in this document is believed to be accurate and reliable However NXP Semiconductors does not give any representations or warranties expressed or implied as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information NXP Semiconductors takes no responsibility for the content in this document if provided by an information
21. verse phase transistor dimmers 20 0005 11 7 4 Changing the output current 11 8 Demo board schematic 12 9 PCB components lsessss 13 10 Test reSultS 2 eee eee 15 10 1 Input output stability 15 11 Legal information Less 16 11 1 Definitions 200002 cee eee 16 11 2 Disclaimers 002000 eee eens 16 11 3 Trademarks 000020 cee eee eee 16 12 Contents 2 2 le mre tee eran ee 17 Please be aware that important notices concerning this document and the product s described herein have been included in section Legal information O NXP B V 2012 All rights reserved For more information please visit http Awww nxp com For sales office addresses please send an email to salesaddresses nxp com Date of release 16 January 2012 Document identifier UM10509
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