UM10341 SSL2101 12 W mains dimmable LED driver
Contents
1. 4 H kK m OSCILLATOR SOURCE Low freq THERMAL Fig 5 Block diagram SSL2101 SHUTDOWN PROTECTION POWER UP LOGIC RESET Overcurrent PWM LIMIT CIRCUIT Short winding protection 019aaa816 UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 8 of 24 NXP Semiconductors U M1 0341 UM10341 SSL2101 12 W mains dimmable LED driver Two other switches are referred to as the weak bleeder pin WBLEED and the strong bleeder pin SBLEED When the voltage on these pins is below a certain value typically 52 V the SBLEED switch closes providing a current path that loads the dimmer during zero voltage crossing This resets the dimmer timer When the voltage on either of these pins is above 52 V and the voltage on the ISENSE pin is below 100 mV the weak bleeder switch closes This current is boosted using Q3 and it provides a current path that loads the dimmer when the converter draws insufficient current to stabilize the dimmer latching While the strong bleeder will always switch the weak bleeder will not activate until the output power drops below 8 W This happens when the LEDs are dimmed or when the maximum LED power is tuned below 8 W Figure 6 and Figure 7 represent bleeder voltage versus time in dimmed and undimmed positi2. Transformer specification TOMS Tati0ss s 9 KR whi anneo E enor Electrical characteristics Core and bobbin1 X Physical dimensions Appendix A Load curves 4 Appendix B Efficiency curves Appendix C Input voltage dependency Appendix D Mains conducted harmonics References 2000s e eee eee eee Legal information sss x e x e x x e x K x e Definitions 0 0 0 cee eee Disclaimers seiten e nariga nennt Trademarks 000000 cee eee eee Contents 11 11 11 12 12 13 14 18 18 18 18 18 19 20 21 22 22 23 23 23 23 24 Please be aware that important notices concerning this document and the product s described herein have been included in section Legal information NXP B V 2011 All rights reserved For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com Date of release 3 February 2011 Document identifier UM10341
3. 3 February 2011 21 of 24 NXP Semiconductors UM10341 SSL2101 12 W mains dimmable LED driver 15 Appendix D Mains conducted harmonics Table 6 Mains conducted harmonic values Harmonic 230 V AC 50 Hz Amplitude 1 100 2 0 3 13 2 4 0 5 3 8 6 0 7 1 2 8 0 1 9 3 2 10 0 11 0 5 12 0 13 2 5 14 0 15 1 8 16 0 17 2 1 18 0 19 2 9 20 0 THD 15 94 PF 0 94 120 V AC 60 Hz Amplitude 100 0 9 0 2 1 0 1 1 9 0 1 2 0 1 0 0 1 1 3 0 1 1 2 0 1 0 5 0 0 1 0 10 80 0 98 16 References 1 AN10754 SSL2101 and SSL2102 dimmable mains LED driver 2 SSL2101 Data sheet 3 SMPS IC for dimmable LED lighting UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 22 of 24 NXP Semiconductors UM10341 17 Legal information SSL2101 12 W mains dimmable LED driver 17 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 17 2 Disclaimers Limited warranty and liability Information in this document is believe
4. 50 Hz or a 120 V 60 Hz mains supply In addition to the mains voltage optimization the board is designed to work with multiple high power LEDs with a total working voltage of between 9 V and 23 V The output current can be limited using trimmer R20 On request a dedicated LED load can be delivered that is to be connected to K3 Connector K2 can be used to attach other LED loads The output voltage is limited to 25 V When attaching a LED load to an operational board hot plugging an inrush peak current will occur due to the discharge of capacitor C6 After frequent discharges the LEDs may deteriorate or become damaged Fig 2 Board connection diagram 019aaa820 UM10341 If a galvanic isolated transformer is used it should be placed between the AC source and the dimmer demo board Connect a user defined LED string to connector K2 as shown in Figure 2 Note that the anode of the LED string is connected to the bottom side of this connector Remark When the board is placed in a metal enclosure the middle pin of connector K1 can be connected to the metal casing for grounding All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 4 of 24 NXP Semiconductors UM10341 4 Specifications SSL2101 12 W mains dimmable LED driver UM10341 Table 1 shows the specifications for the SSL2101 driver
5. NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver 11 Transformer specification Figure 9 shows the transformer schematic 2 9 ni 3 3 f N3 1 6 5 no 3 4 s 019aab066 Fig 9 Transformer schematic 11 1 Turns ratio e 1 2 4 5 1 0494 2 e 1 2 6 9 1 0 247 2 11 2 Electrical characteristics Table 5 Inductance Section Inductance N1 1 08 mH 7 at 1 6 A N2 70 uH N3 270 uH e Nominal frequency 100 kHz 11 3 Core and bobbin1 x e Core EFD25 3F3 N87 air gap center 1100 um e Bobbin CSH EFD25 1S 10P 11 4 Physical dimensions Eo T aR 18 0 2 11 78 0 1 16 4 mi E ius 25512 i max 0 2 t 4 amp 3 6 Dimensions in mm 019aaa813 Fig 10 Transformer dimensions UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 18 of 24 NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver 12 Appendix A Load curves 12 019aaa822 lout 1 800 mA 0 8 650 mA 0 6 500 mA 0 4 6 10 14 18 22 Vioad Fig 11 120 V AC load curve 14 019aaa821 lout 1 2 1 800 mA 0 8 700 mA 0 6 500 mA 0 4 9 11 13 15 17 19 21 23 Vioad Fig 12 230 V AC loa
6. The relationship between PWMLIMIT and output current is quadratic in nature The resultant output current spread will be acceptable for most LED applications The dimming range is detected by sensing the average rectified voltage R4 R5 and R17 comprise a voltage divider and C9 filters the resultant signal The converter sets its duty factor and converter frequency accordingly All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 10 of 24 NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver 8 Board optimization UM10341 8 1 8 2 8 3 The following modifications must be made in order to meet different customer application requirements Remark All components referred to in the text can be located on Figure 8 Board schematic diagram Changing the output voltage and LED current When compared with other topologies a flyback converter has the major advantage that it is suitable for driving a broader range of output voltages Essentially changing the turns ratio whilst maintaining the value of the primary inductance will shift the output working voltage accordingly Part of the efficiency of the driver is linked to the output voltage A lower output voltage will increase the transformation ratio and cause higher secondary losses In practice a mains dimmable flyback converter will have an e
7. 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 necessary 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 national 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 an
8. resistor 10 kQ 0 1 5 S Free 9 26 R20 resistor 50 kQ Lin 0 1 5 S Horizontal Bourns 27 R21 resistor 22 KQ 0 1 1 Free S 28 R22 resistor 330 Q 0 1 1 Free S 29 R23 resistor 4709 0 25 5 Free S 30 R24 resistor 3 9 kQ 0 1 5 Free S 31 R25 resistor 470 KQ 0 25 5 Free z 32 R26 resistor 10 kQ 0 1 5 Free S S 33 C1 capacitor 470 pF S 10 1k Cer DEBB33A471KC1B Murata 34 C2 capacitor 150 nF 10 400 Poly NRM S154K400F NIC 35 C3 capacitor 150 nF 10 400 Poly NRM S154K400F NIC 36 C4 capacitor 150 nF S 10 400 Poly NRM S154K400F NIC 37 C5 capacitor 4 7 uF 10 63 Poly B32560J475K Epcos 38 C6 capacitor 2200 uF 105 10 25 Free 2222 021 16222 Vishay UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 14 of 24 NXP Semiconductors UM10341 SSL2101 12 W mains dimmable LED driver Table 3 Bill of materials 230 V AC continued Part Ref Part Value or Power Tol Volt Package Type Manufacturer No part no W V 39 C7 capacitor 4 7 uF 105 10 25 Free 40 CB capacitor 330 pF Y1type 5 Cer Free 41 C9 capacitor 10 uF 105 10 25 Free 42 C10 capacitor 2 2 nF 10 4k Cer DECE33J2227C4B Murata 43 C11 capacitor 10 nF 10 25 Cer Free 44 L1 inductor 680 uH 744776268 Wurth 45 L2 inductor 330 uH 744776233 Wurth 46 L3 inductor 100 uH 74477120 Wurth 47 TX1 transform
9. resistor 470 KQ 0 25 1 Free 11 R5 resistor 0Q 0 25 5 Free 12 R6 resistor 2 7 KQ 1 5 200 Free S 12 R7 resistor 2 7 KQ 1 5 200 Free S 14 R8 resistor 1 KQ 1 5 200 Free 15 R9 resistor 1 KQ 1 5 200 Free S 16 R10 resistor 0 40 1 1 Free 17 R11 resistor 33 kQ 0 25 5 200 Free l 18 R12 resistor 100 1 5 200 Free S 19 R13 resistor 100 KQ 0 1 1 200 Free 20 R14 resistor 15 KQ 0 1 1 Free S 21 R15 resistor 470 KQ 0 1 1 Free s 22 R16 resistor 10 KQ 0 1 1 Free S S 23 R17 resistor 12 KQ 0 1 1 Free S 24 R18 resistor 0 3 0 1 1 Free 25 R19 resistor 10 KQ 0 1 5 Free 26 R20 resistor 50 kQ Lin 0 1 5 Horizontal Bourns 27 R21 resistor 22 KQ 0 1 1 Free 28 R22 resistor 330 Q 0 1 1 S Free S 29 R23 resistor 3 9 KQ 0 25 5 Free S 30 R24 resistor 3 9 KQ 0 1 5 Free lt 31 R25 resistor 100 KQ 0 25 5 S Free S 32 R26 resistor NP Free S 33 C1 capacitor 470 pF 10 1k Cer DEBB33A471KC1B Murata 34 C2 capacitor 100 nF 10 400 Poly NRM S104K400F NIC 35 C3 capacitor 330 nF 10 400 Poly NRM S334K400F NIC 36 Cd capacitor 330 nF 10 400 Poly NRM S334K400F NIC 37 CB capacitor 4 7 uF 10 63 Poly B32560J475K Epcos 38 C6 capacitor 2200 uF 105 10 25 2222 021 16222 Vishay 39 C7 capacitor 4 7 uF 105 10 25 Free 40 C8 capacitor 330 pF 5 Cer Free UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011
10. All rights reserved User manual Rev 2 3 February 2011 16 of 24 NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver Table 4 Bill of materials 120 V AC continued Part Ref Part Value or Power Tole Volt Package Type Manufacturer No part no W V 41 c9 capacitor 10 uF 105 10 25 Free 42 C10 capacitor 2 2 nF Y1 type 10 4k Cer DECE33J222ZC4B Murata 43 C11 capacitor 10 nF 10 25 Cer Free 44 L1 inductor 680 uH 744776268 Wurth 45 L2 inductor 330 uH 744776233 Wurth 46 L3 inductor 100 uH 74477120 Wurth 47 TX1 transformer N87 3F3 5 EFD25 750340505 Wurth 48 D1 rect bridge 2A SO 4 DBLS205G Taiwan semi 49 D2 TVS diode 600 270 P6KE270A Fairchild 50 D3 diode 1A 800 HER107 Taiwan semi 51 D4 Zener 3 220 BZT03 C220 Vishay 52 D5 diode 1A 800 HER107 Taiwan semi 53 D6 diode 3A 100 SK310A Taiwan semi 54 D7 diode 1A 800 HER107 Taiwan semi 55 D8 Zener 5 30 BZV55 C30 NXP 56 D9 Zener 5 20 BZV55 C20 NXP 57 D10 diode 75 1N4148 NXP 58 Qi transistor NPN BC847B NXP 59 Q2 transistor NPN BC847B NXP 60 Q3 transistor PNP MPSA92 NXP 61 ISO2 optocoupler CNY17 1 Fairchild 62 U1 IC SO 16 SSL2101T NXP UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 17 of 24
11. Table 1 Specifications Parameter Value Comment AC line input voltage 85 V to 276 V board has been optimized for Output voltage LED voltage Output voltage protection Output current LED current Output voltage load current dependency Current ripple Maximum output power LED power Efficiency Power Factor 120 V 60 Hz 230 V 50 Hz Switching frequency Dimming range Board dimensions Operating temperature Isolation voltage Input voltage load current dependency 9 V DC to 23 V DC 25 V DC 400 mA to 800 mA lt 4 Volt in regulated range 150 mA 17W 70 to 78 0 99 0 94 0 90 60 kHz to 75 kHz 100 to 0 103 mm x 50 mm x 20 mm 0 C to 85 C 1 8 kV 5 to 6 3 to 3 230 V 50 Hz or 120 V 60 Hz 10 variation adjustable with trimmer refer to the attached graphs at 500 mA At Vo 21 V at Tamb 25 C see Section 13 graphs at 15 W output power at 15 W output power at 11 W output power LxWxH between primary and secondary circuit in the range of 130 V 60 Hz to 110 V 60 Hz in the range of 250 V 50 Hz to 210 V 50 Hz All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 5 of 24 NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver 5 Board photos 019aaa819 Fig 3 Demo board top 019aaa818 Fi
12. UM10341 SSL2101 12 W mains dimmable LED driver Rev 2 3 February 2011 User manual Document information Info Content Keywords SSL2101 LED driver AC DC conversion dimmable mains supply user manual Abstract This is a user manual for the SSL2101 12 W mains dimmable LED driver demo boards NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver Revision history Rev Date Description v 2 20110203 first issue UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 2 of 24 NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver 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 laws to work with non insulated mains voltages and high voltage circuits This product shall never be operated unattended The SSL2101 driver is a solution for a professional application with multiple high power LEDs that require galvanic isolation and a safe output voltage It is mains dimmable for both forward phase triac dimmers and r
13. d curve UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 19 of 24 NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver 13 Appendix B Efficiency curves 019aaa824 80 n 75 70 65 60 55 Vioad Fig 13 120 V AC efficiency curve 019aaa823 80 T 800mA 75 700 mA 70 500 mA 65 60 Vioad Fig 14 230 V AC efficiency curve UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 20 of 24 NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver 14 Appendix C Input voltage dependency 0 68 019aaa826 0 74 019aaa825 lout out A 0 72 0 64 0 7 0 60 0 68 0 56 0 66 0 52 0 64 100 110 120 130 140 200 210 220 230 240 250 Vin V Vin V a 120 V AC b 220 V AC Fig 15 Input voltage output current dependency UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2
14. d 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 the 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 Safety of high voltage evaluation products 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 that is qualified according to local requirements and labor laws to work with non insulated mains voltages and high voltage circuits The product does not comply with IEC 60950 based national or regional safety standards NXP Sem
15. d 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 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 equipme
16. e The negative phase cut trailing edge causes no inrush current when the dimmer triggers When using triac dimmers there will be a sudden voltage difference over the input leading to a steep charge of the input capacitors The resultant peak current will lead to higher damper dissipation Because this steep charge is missing the input capacitors will have less stress and the input circuit is less prone to audible noise All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 11 of 24 NXP Semiconductors U M1 0341 UM10341 8 4 8 5 SSL2101 12 W mains dimmable LED driver Transistor dimmers contain active circuitry that require a load charge during the time that the dimmer is open The dimensioning of the circuit generating the internal supply voltage inside the dimmer is made critical in order to avoid excessive internal dimmer losses This means that the remaining voltage drop over the lamp must be low enough to reach this charge For dimmers such as the Busch Jaeger 6519U the minimum lamp load is specified at 40 W which is equivalent to a 1 3 kQ resistor load at 230 V AC Such a load would result in highly inefficient operation at low output power levels since most energy is wasted in order to drive the dimmer and not to produce light The value of the demo board weak bleeder R6 and R7 is chosen to minimize losses approxima
17. er N87 3F3 EFD25 750340505 Wurth 48 D1 rect bridge 2A SO 4 DBLS205G Taiwan semi 49 D2 TVS diode 600 400 P6KE400A Fairchild 50 D3 diode 1A 800 HER107 Taiwan semi 51 D4 Zener 3 220 BZT03 C220 Vishay 52 D5 diode 1A 800 HER107 Taiwan semi 53 D6 diode 3A 100 SK310A Taiwan semi 54 D7 diode 1A 800 HER107 Taiwan semi 55 D8 Zener 5 30 BZV55 C30 NXP 56 D9 Zener 5 20 BZV55 C20 NXP 57 D10 diode 75 1N4148 NXP 58 Q1 transistor NPN BC847B NXP 59 Q2 transistor NPN BC847B NXP 60 Q3 transistor PNP ZTX758 Zetex 61 ISO2 optocoupler CNY17 1 Fairchild 62 U1 IC SO 16 SSL2101T NXP UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 15 of 24 NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver Table 4 Bill of materials 120 V AC Part Ref Part Value or Power Tole Volt Package Type Manufacturer No part no W Gal V 1 K1 conn 3 pin 2 m S S SL 5 08 3 90 Weidmuller 2 K1 conn 3 pin 2 f BL 5 08 3 Weidmuller 3 K3 conn 6 pin 1 f BL3 36Z Fischer 4 K2 conn 2 pin 2 m SL 5 08 2 90 Weidmuller 5 K2 conn 2 pin 2 f S S BL 5 08 2 Weidmuller 6 F1 fusistor 6 8 Q 1 10 Free S 2 7 R1 resistor 270 1 5 Free 8 R2 resistor 270 1 5 Free 9 R3 resistor 2 7 KQ 1 5 Free 10 R4
18. everse phase transistor dimmers It can generate up to 16 W output power which is equal to a 100 W incandescent lamp at 63 Lumen W Examples are shelf lighting down lighting and LED lighting for bathrooms etc The design demonstrates how to produce a driver that is suitable for small form factor applications such as retrofit lamps 2 Safety warning The board needs to be connected to mains voltage Touching the reference board during operation must be avoided at all times An isolated housing is obligatory when used in uncontrolled non laboratory environments Even though the secondary circuit with LED connection has galvanic isolation this isolation is not according to any regulated norm Galvanic isolation of the mains supply using a variable transformer is always recommended These devices can be recognized by the symbols shown in Figure 1 019aaa690 019aaa691 a Isolated b Not Isolated Fig 1 Variac isolation symbols UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 3 of 24 NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver 3 Connecting the board Remark All components referred to in the text can be located on Figure 8 Board schematic diagram and connectors can be found on Figure 2 Board connection diagram The board can be optimized for a 230 V
19. fficiency of between 80 for high output voltages such as 60 V down to 50 for low output voltages such as 3 V Synchronous rectification might become advisable to reduce losses at low voltages The NXP TEA1791 can be used for this purpose For exact calculations of transformer properties and peak current refer to application note AN10754 SSL2101 and SSL2102 dimmable mains LED driver and the calculation tool that is provided with it Changing the output ripple current The output current ripple is principally determined by the LED voltage the LED dynamic resistance and the output capacitor The value of C6 has been chosen to optimize capacitor size with light output A ripple of 25 will result in an anticipated deterioration of light output of lt 1 The size for the buffer capacitor can be estimated using the following equation TLeD 1 Cp 4 x 1 Gi AI x fnet x R dynamic Example For a ripple current of 5 and a mains frequency of 50 Hz and a dynamic resistance of 0 6 Q C6 has to be 20 300 x 0 6 111 mF For a ripple current of 25 and a dynamic resistance of 6 Q C6 has to be 4 300 x 6 2200 uF Using a series of LEDs the dynamic resistance of each LED can be added to the total dynamic resistance Adapting to high power reverse phase transistor dimmers Reverse phase transistor dimmers differ in two ways that can be beneficial but can also cause problems with dimming detection
20. ficant voltage drop and thus dissipation through this resistor To improve efficiency a combination of serial resistance and a parallel damper has been chosen for the demonstration board The serial resistor is made up of F1 R1 R2 and R12 and the parallel damper comprises C2 and R3 see Figure 8 The input circuit of the converter must be equipped with a filter that is partially capacitive The combination of C1 L1 L2 C3 and C4 makes a filter that blocks most of the disturbance generated by the converter input current A drawback of this filter is a reduction of power factor due to the capacitive load A lower converter power in relation to the capacitive value of this filter buffer will cause a lower power factor The 230 V AC design uses 150 nF capacitors which attain a power factor of 0 9 for an 11 W output power The board is equipped with a feedback loop that limits the output current This feedback loop senses the LED current over sense resistor R18 and a current mirror is used consisting of Q1 and Q2 The current level can be set using R20 The same feedback loop is also used for overvoltage protection If the LED voltage exceeds 23 V a current will flow through R19 and D9 The current through the optocoupler IC2 will pull down the PWMLIMIT and BRIGHTNESS pin The on time is zero at a value below 400 mV The feedback loop has proportional action only and the gain is critical because of phase shift caused by the converter and C6
21. g 4 Demo board bottom UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 6 of 24 NXP Semiconductors UM10341 6 Dimmers SSL2101 12 W mains dimmable LED driver UM10341 Several triac based dimmers have been tested by NXP Semiconductors Because different dimmers have different specifications the dimming performance of the board may vary Table 2 provides a list of dimmers that have currently been tested with the board Table 2 Dimmer selection Manufacturer Type Opus Opus Bush Jaeger Bush Jaeger Bush Jaeger Gira Everflourish Drespa Ehmann Drespa Lutron Levitron Levitron Levitron Levitron Levitron Cooper Lutron 852 390 852 392 2250U 2247U 6519U 1184 EFO700D 0817 39 Domus 815 TG 600PH WH L12 6641 W LO2 700 W 6602 IW 6683 W R12 6631 LW 6001 MIR 600THW WH Voltage V AC 230 230 230 230 230 230 230 230 230 230 120 120 120 120 120 120 120 120 Power range Load W 60 400 20 500 20 600 20 500 40 550 60 400 50 300 20 315 20 500 20 500 600 600 600 600 600 600 600 600 Ha Inc Inc Ha Inc Ha Inc Ha Inc Inc Ha Inc Ha Inc Ha Inc Inc Inc Inc Inc Inc Inc Inc Inc Ha Inc Min dimming range 0 6 0 05 0 03 0 07 8 4 1 0 2 3 4 1 1 1 0 9 All information provided in this documen
22. iconductors does not accept any liability for damages incurred due to inappropriate use of this product or related to non insulated high voltages Any use of this product is at customer s own risk and liability The customer shall fully indemnify and hold harmless NXP Semiconductors from any liability damages and claims resulting from the use of the product 17 3 Trademarks Notice All referenced brands product names service names and trademarks are the property of their respective owners NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 23 of 24 NXP Semiconductors UM10341 18 Contents SSL2101 12 W mains dimmable LED driver GO G Om Q E GM 8 4 8 5 10 11 11 1 11 2 11 3 11 4 12 13 14 15 16 17 17 1 17 2 17 3 18 Introduction sss es x e x x eee Safety warning xx x e x x cece x x renee Connecting the board sss x e x ee Specifications x e x e K x K K e Ke Board photos xes es eee Dimmers Functional description 00000 Board optimization sss e x e x x eee x eee Changing the output voltage and PED CUNENE ics sc irosen setae waaleee Changing the output ripple current Adapting to high power reverse phase transistor dimmers Changing the load curve Multiple driver support Board schematic 0000eees Bill Of Materials BOM
23. nt 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 accepts 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 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 UM10341 All information provided in this document is subject to legal disclaimers NXP Semiconductors does not accept any liability related to any default damage costs
24. on low voltage active Measure P1 rms C4 P2 rms C1 P3 mean Math P4 PS PB value 15 06 V 145 m lt a 100 maa 0 0 mA offset 256 mA 019aaa810 Measure P1 rms C4 P2 rms C1 P3 mean Math P4 P5 P6 value 132 3 mA 26 13 Y 259 mW 7 rigger 2 00 msidiv Auto 200 kS 10 MSs JEdge Positive 019aaa815 Fig 7 _ Undimmed bleeder operation This board is optimized to work with a power factor above 0 9 In order to achieve this the converter operates in constant tp mode The output power of the converter is buffered by capacitor C6 Due to this configuration the circuit has a resistive input current behavior during un dimmed operation see Input in Figure 7 During dimmed operation however not only must the dimmer latch and hold current be maintained but a damper must be added to dampen the inrush current and to dissipate the electric power that was stored in All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 9 of 24 NXP Semiconductors U M1 0341 UM10341 SSL2101 12 W mains dimmable LED driver the LC filter within the dimmer A serial resistor can be used for this for low power ranges lt 10 W but for higher power ranges a single series resistor is not efficient This is because the converter supply current will cause signi
25. rd schematic diagram D me UM10341 All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 13 of 24 NXP Semiconductors U M1 0341 SSL2101 12 W mains dimmable LED driver 10 Bill Of Materials BOM Table 3 Bill of materials 230 V AC Part Ref Part Value or Power Tol Volt Package Type Manufacturer No part no W V 1 K1 conn 3 pin 2 m S SL 5 08 3 90 Weidmuller 2 K1 conn 3 pin 2 T S S BL 5 08 3 Weidmuller 3 K3 conn 6 pin 1 f BL 3 36Z Fischer 4 K2 conn 2 pin 2 m S S SL 5 08 2 90 Weidmuller 5 K2 conn 2 pin 2 f S S S S BL 5 08 2 Weidmuller 6 F1 fusistor 6 8 Q 1 10 S Free 7 R1 resistor 39 Q 1 5 S Free S S 8 R2 resistor 39 Q 1 5 Free S S 9 R3 resistor 1kQ 2 5 Free S S 10 R4 resistor 470 KQ 0 25 1 S Free 11 R5 resistor 470 KQ 0 25 1 S Free S 12 R6 resistor 10 KQ 1 5 200 Free S 12 R7 resistor 10 kQ 1 5 200 Free S 14 R8 resistor 2 2 KQ 1 5 200 Free S 15 RQ resistor 2 2 KQ 1 5 200 Free 16 R10 resistor 0 40 1 1 S Free 17 R11 resistor 33 KQ 0 25 5 200 Free 18 R12 resistor 150 1 5 200 Free 19 R13 resistor 100 kQ 0 1 1 200 Free S S 20 R14 resistor 22 KQ 0 1 1 Free S 21 R15 resistor 470 KQ 0 1 1 S Free E 22 R16 resistor 4 7 KQ 0 1 1 Free S 23 R17 resistor 12 KC 0 1 1 Free S 24 R18 resistor 0 3 Q 1 1 z Free S S 25 R19
26. t is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 7 of 24 NXP Semiconductors UM10341 SSL2101 12 W mains dimmable LED driver 7 Functional description Remark All components referred to in the text can be located on Figure 8 Board schematic diagram The IC controls and drives the flyback converter part and ensures proper dimmer operation Several high voltage switches are integrated in the IC One of these controls the flyback input power and is situated between the DRAIN and SOURCE pins When the switch closes a current stores energy in the transformer TX1 The switch is opened when the duty factor has exceeded the level set by the PWMLIMIT pin with a maximum of 75 or when the voltage on the SOURCE pin exceeds 0 5 V Following this the energy stored in the transformer is discharged to D6 and the output capacitors C5 and C6 and finally absorbed by the load The converter frequency is set with an internal oscillator the timing of which is controlled by external RC components on pins RC and RC2 By varying the BRIGHTNESS pin voltage the oscillator frequency can be modulated to an upper and lower value The ratio between R15 and R16 sets the frequency variation Vcc GND RC BRIGHTNESS RC2 PWMLIMIT ISENSE SBLEED WBLEED BLEEDER SUPPLY DRAIN J waver Kr L LOGIC F D 100 mV AUX
27. tely 2 W to 3 W The weak bleeder normally only switches on during dimmed operation The voltage drop with some transistor dimmers is however not sufficient to cause full dimming range control minimum 10 instead of lt 1 because the average rectified voltage is used to determine the dimming position To compensate for the reduced voltage difference voltage detection can be made more sensitive by replacing R4 with a zener diode such as the BZV85 C200 for 230 V AC or the BZV85 C68 for 120 V AC applications Because of increased sensitivity the dimming curve will also be steeper when using triac dimmers Changing the load curve The load curve can be divided into two regions one where the control loop limits the duty cycle of the converter and where the output current is regulated and another where the duty factor feedback is no longer dominant This last part occurs at output voltages below 13 V In this area constant output power becomes the dominant control mechanism Changing the turns ratio of the transformer to match the output load will also change the load curve Multiple driver support It is possible to attach multiple converters to a single dimmer When using triac dimmers the inrush current will rise although not in proportion to the number of converters used Transistor dimmers are more suitable for use with multiple converters because the dimming range will increase due to the added bleeder action and there is no inr
28. ush current All information provided in this document is subject to legal disclaimers NXP B V 2011 All rights reserved User manual Rev 2 3 February 2011 12 of 24 NXP Semiconductors UM10341 9 Board schematic SSL2101 12 W mains dimmable LED driver R1 F1 s X A A ios a Sit E o 4 Z a S a anaon A 1 a a a at 1 2 gid dl 21a aot 9 0 Hy Saar a ia d ia wal i t L 2 o aq ac y O o O o G E g NI 2y g ac ac FE af i LE 5 O o o L a rk a 5 ac 1 tA K an ee pew E o EAEN Fm E 2 gt i g 5 Z a ph i c 1 E 8 S F4 E KE 5 K H a 8 z 2 L DC T EST Ie m N k i a z zZ 2 2 a ac ac fe x no a LS gE a O on r G ow on S S mS N S S Z ro a sf 9 NO Na D D o b WN 9 d WW K O r NOT NO OR DO O Q Q a LU LU SK Ke g E a ao a wn wn Q DC ac t 7 a a O wn 8 Wi S gle amp ig T a zZ E o T o f o G T gt o il T II Zz a gt d g N E 8 IJ g O ac 1k 4 T Z 2 2 i i g K ba ll 2 a 1 Z Z a Ia iS lo Boa
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