UM10341_1
Contents
1. 54 D7 Diode 1 800 V HER107 Taiwan semi 1 55 D8 Zener 30 V 5 BZV55 C30 NXP 1 56 D9 Zener 20 V 5 BZV55 C20 NXP 1 57 D10 Diode 75 V 1N4148 NXP 1 58 Q1 Transistor NPN BC847B NXP 1 59 Q2 Transistor NPN BC847B NXP 1 60 Q3 Transistor PNP MPSA92 NXP 1 61 ISO2 Optocoupler AN27 Vishay 1 62 U1 IC SSL2101 SO 16 Y SSL2101 1 SSL2102 SO 20 SSL2102 W 11 Transformer specification Figure 9 shows the transformer schematic y ga EE Li 1 9 i e N1 i N3 2 1 1 l l l l l l l l l l 4 1 l l l l l l N2 1 5 1 I l L pee cect eens oe ed I Fig9 Transformer schematic UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 17 of 24 NXP Semiconductors UM10341 1 UM10431_1 11 1 Winding specification Table 5 Winding specification SSL2101 SSL2102 12 W LED driver No Section Wire Layers 1 N1 1X0 315 1 2 ISO 0 2 3 N3 40X0 071 1 4 ISO 0 2 5 N2 1X0 2 1 6 ISO 0 2 7 N1 1X0 315 1 8 ISO 0 2 Turns Pin Begin End 43 2 21 9 6 42 5 4 42 1 11 2 Electrical characteristics Table 6 Inductance Section N1 N2 N3 Inductance 910 uH 5 at 2 3 A 70 uH 270 uH e Nominal frequency 100 kHz Vbreakdown N1 N2 4 KV 11 3 Core and bobbin e Core EFD25 3F3 N87 airgap center 1100 uM e Bobbin CSH EFD25 1S 10P NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 18 of2. SSL2102 6SO SSL2102 20 W Table 4 Bill of materials 120 V AC Part Ref Part Value Pwr Tol Volt Package Type Manuf Amount No Des 1 K1 Conn 3pin 2u m SL 5 08 3 90 Weidmuller 1 ang 2 K1 Conn 3pin 2u f BL 5 08 3 Weidmuller 1 3 K3 Conn 6pin 1u f BL3 36Z Fischer 1 UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 15 of 24 NXP Semiconductors U M1 0341 1 SSL2101 SSL2102 12 W LED driver Table 4 Bill of materials 120 V AC Part Ref Part Value Pwr Tol Volt Package Type Manuf Amount No Des 4 K2 Conn 2pin 2u m SL 5 08 2 90 Weidmuller 1 ang 5 K2 Conn 2pin 2u f BL 5 08 2 Weidmuller 1 6 F1 Fusistor 6 8E 1W 10 Free 1 7 R1 Resistor 27 0 1W 5 Free 1 8 R2 Resistor 27 0 1W 5 Free 1 9 R3 Resistor 2 7 KO iw 5 Free 1 10 R4 Resistor 470KQ 0 25 1 Free 1 11 R5 Resistor 09 0 25 5 Free 1 12 R6 Resistor 2 7 KO iw 5 200 Free 1 13 R7 Resistor 2 7 KO 1W 5 200 Free 1 14 R8 Resistor 1 KO 1W 5 200 Free 1 15 R9 Resistor 1 KO 1W 5 200 Free 1 16 R10 Resistor 0 4 Q iw 1 Free 1 17 R11 Resistor 33 KO 025 5 200 Free 1 18 R12 Resistor 10 Q 1W 5 200 Free 1 19 R13 Resistor 100KQ 0 1 1 200 Free 1 20 R14 Resistor 15 KO 0 1 1 Free 1 21 R15 Resistor 470 KO 0 1 1 Free 1 22 R16 Resistor 10 KO 0 1 1 Free 1 23 R17 Resistor 12 KO 0 1 1 Free 1 24 R18 Resistor 0 3 Q 1W 1 Free 1 25 R19 Resistor 10 KQ 0 1 5 Free 1 26 R20 Resistor 50 KO 0 1 5 Horizontal Bourns 1 Lin 27 R21 Resistor 22 KQ 0 1 1 Free 1
3. 230 20 500 Inc 0 05 Bush Jaeger 2250U 230 20 600 Ha Inc 0 03 Bush Jaeger 2247U 230 20 500 Ha Inc 0 07 Bush Jaeger 6519U 230 40 550 Ha Inc 8 4 Gira 1184 230 60 400 Inc 1 Everflourish EFO700D 230 50 300 Ha Inc 0 2 Drespa 0817 230 20 315 Ha Inc 3 4 Ehmann 39 Domus 230 20 500 Ha Inc 1 Drespa 815 230 20 500 Inc 1 1 Lutron TG 600PH W 120 600 Inc 0 off H Levitron L12 6641 W 120 600 Inc 0 off Levitron L02 700 W 120 600 Inc 0 off Levitron 6602 IW 120 600 Inc 0 off Levitron 6683 W 120 600 Inc 0 off NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 6 of 24 NXP Semiconductors U M1 0341 1 7 Functional SSL2101 SSL2102 12 W LED driver Table 2 Dimmer selection Manufacturer Type Voltage V Power range Load Min dimming AC W range Levitron R12 6631 LW 120 600 Inc 0 off Cooper 6001 120 600 Inc 0 off Lutron MIR 600THW 120 600 Ha Inc 0 9 WH description UM10431_1 The board can be equipped with either the SSL2101 or SSL2102 depending on the operating conditions and output power The SSL2102 has lower thermal resistance and is thus more suitable for higher temperatures and higher loads The IC has several internal functions It controls and drives the flyback converter part and it ensures proper dimmer operation In the IC itself there are several high voltage switches integrated One of these switches controls the flyback input power and
4. 24 R NXP Semiconductors _UM10341_1 SSL2101 SSL2102 12 gt LED driver bk kW bh 11 4 Physical dimensions Op AH To Ta fe Ms 18 12 Po Pa Fig 2 EFD25 13 9 coil former 10 pins Fig 10 Transformer dimensio ww 12 Appendix A Load curves 120 V AC load curve 1 200 1 100 1 000 0 900 3 0 800 0 700 0 600 0 500 0 400 6 8 10 12 Uload 14 16 18 20 22 Fig 11 120 V AC load curve UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 19 of 24 NXP Semiconductors w _UM10341_1 SSL2101 SSL2102 12 W LED driver gt 80 0 75 0 70 0 65 0 60 0 w wy w ds Le To e 230 V AC load curves Ce 1 300 O 1 200 1 100 1 000 _ 0 900 3 0 800 0 700 0 600 0 500 0 400 9 11 13 15 Uload 17 19 21 23 hd Fig 12 230 V AC load curve aw 500 mA 120 V AC efficiency curves 800 mA 55 0 6 8 10 12 Uload 14 16 18 20 22 Fig 13 120 V AC efficiency curve UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 20 of 24 B S Yn RAN NXP Semiconductors U M10341 1 i SSL2101 SSL2102 12 W LED driver gt w
5. Dimmers 7 Functional description 8 Board optimization 8 1 Changing the output voltage and LED GUMENI sce Sunrise des Bind ee ee 8 2 Changing the output ripple current 8 3 Adapting to high power reverse phase transistor dimmers 8 4 Changing the load curve 8 5 Multiple driver support 9 Board schematic 10 Bill of materials BOM 11 Transformer specification 11 1 Winding specification 11 2 Electrical characteristics 11 3 Core and bobbin 4 11 4 Physical dimensions 12 Appendix A Load curves 13 Appendix B Efficiency curves 14 Appendix C Input voltage dependency 15 Appendix D Mains conducted harmonics 16 References 17 Legal information 17 1 Definitions RAT 17 2 Disclaimers 17 3 Licenses M 7 17 4 Patents 4 17 5 Trademarks 18 ConBnts B ene arne enn een aa founded by 10 10 11 11 12 13 14 17 18 18 18 19 19 20 21 22 22 23 23 23 23 23 23 Please be aware that important notices concerning this document and the product s described
6. NRM S154K400F NIC 1 36 C4 Capacitor 150 nF Poly 10 400 NRM S154K400F NIC 1 37 C5 Capacitor 4 7uF Poly 10 63 B32560J475K Epcos 1 UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 14 of 24 NXP Semiconductors UM10341 1 SSL2101 SSL2102 12 W LED driver Table 3 Bill of materials 230 V AC Par Ref Part Value Pwr Tol Volt Package Type Manuf Amount t Des No 38 C6 Capacitor 2200 uF 105 10 25 2222 021 16222 Vishay 1 39 C7 Capacitor 4 7 uF 105 10 25 Free 1 40 C8 Capacitor 330 pF Cer 5 Free 1 41 C9 Capacitor 10 uF 105 10 25 Free 1 42 C10 Capacitor 2 2 nF Cer 10 4K DECE33J222ZC4B_ Murata 1 43 C11 Capacitor 10 nF Cer 10 25 Free 1 44 11 Inductor 680 uH 744776268 Wurth 1 45 L2 Inductor 330 uH 744776233 Wurth 1 46 L3 Inductor 100 uH 74477120 Wurth 1 47 TX1 Transformer N87 3F3 5 EFD25 750340505 Wurth 1 48 D1 Rect Bridge 2A SO 4 DBLS205G Taiwan 1 semi 49 D2 TVS diode 600 W P6KE400A Fairchild 1 50 D3 Diode 1A HER107 Taiwan 1 800 V semi 51 D4 Zener 270V BZT03 C220 Vishay 1 3 W 52 D5 Diode 1A HER107 Taiwan 1 800 V semi 53 D6 Diode 3A SK310A Taiwan 1 100 V semi 54 D7 Diode 1A HER107 Taiwan 1 800 V semi 55 D8 Zener 30 V 5 BZV55 C30 NXP 1 56 D9 Zener 20 V 5 BZV55 C20 NXP 1 57 D10 Diode 75 V 1N4148 NXP 1 58 Q1 Transistor NPN BC847B NXP 1 59 Q2 Transistor NPN BC847B NXP 1 60 Q3 Transistor PNP ZTX758 Zetex 1 61 ISO2 Optocoupler 4N27 Vishay 1 62 U1 IC SSL2101 SO 1 Y SSL2101 1
7. 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 a galvanic isolation this isolation is not according to any regulated norm Galvanic isolation of the mains phase using a variable transformer is always recommended These devices can be recognized by the symbols shown in Figure 1 a Isolated b Not Isolated Fig 1 Variac isolation symbols 3 Connecting the board The board can be optimized for a 230 V AC 50 Hz or for a 120 V AC 60 Hz mains source Besides 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 discharge of capacitor C6 After frequent discharges the LEDs may deteriorate or become damaged Contact information For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com UM
8. it is situated between the Drain pin and Source pin On closing a current will start to run which stores energy in the transformer TX1 This current is interrupted when the duty factor has exceeded the level set by the PWMtimit pin with a maximum of 75 or when the voltage on the Source pin exceeds 0 5 V At the next cycle 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 The frequency can be modulated using the brightness pin to an upper and lower value The ratio between R15 and R16 sets the frequency variation NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 7 of 24 NXP Semiconductors U M1 0341 1 SSL2101 SSL2102 12 W LED driver Vee GND RC BRIGHTNESS RC2 PWMLIMIT ISENSE SBLEED WBLEED BLEEDER SUPPLY DRAIN VALLEY He u LOGIC dl AU 100 mV He Stop Fy T OSCILLATOR Low freq SOURCE PROTECTION POWER UP LOGIC RESET Overcurrent PWM LIMIT CIRCUIT Short winding protection 014aaa567 Fig 5 Block diagram SSL2101 UM10431_1 The two other switches are called the weak bleeder pin Wbleea and the strong bleeder pin Sblee
9. mA 26 13 Y 259 my status imebase 0 00 ms 50 0 Vidiv 100 mAvdiv 2 00 msidiv f Auto 149 00 Y ofst f 200 kS 10 MS s f Edge Positive 50 0 Vidiv 277 0 4 128 5 v J Ay 128 5 Ay Fig 7 Un dimmed bleeder operation This board is optimized to work with a power factor above 0 9 In order to achieve this the converter operates at 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 behaviour in un dimmed operation see Input in Figure 7 In dimmed operation however not only the dimmer latch and hold current must be maintained but a damper must be added to dampen the inrush current and to dissipate the electric power that was stored in the LC filter within the dimmer Though at low power ranges lt 10 W a serial resistor can be used for this at higher power ranges a single series resistor is not efficient because the converter supply current will cause significant voltage drop and thus dissipation through UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 9 of 24 NXP Semiconductors U M1 0341 1 SSL2101 SSL2102 12 W LED driver this resistor On the demonstration board a combination of serial resistance and a parallel damper has been chosen to improve efficiency The serial resistor is made up of F1 R1 R2 and R12 The parallel damper is made of C2 and R3 See Figur
10. ripple of 25 will result in an expected deterioration of light output lt 1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 10 of 24 NXP Semiconductors U M1 0341 1 UM10431_1 8 3 8 4 SSL2101 SSL2102 12 W LED driver The size for the buffer capacitor can be estimated from the following equation E yee EER TM 6f C net Rome As example For a ripple current of 5 and a mains frequency of 50 Hz and a dynamic resistance of 0 6 Q C6 becomes 20 300 0 6 111 mF For a ripple current of 25 and a dynamic resistance of 6 4 300 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 e The negative phase causes no inrush current when the dimmer triggers At TRIAC dimmers there will be a sudden voltage difference over the input leading to a steep charge of the input capacitors The resulting 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 prune to audible noise e Transistor dimmers contain active circuitry that require a load charge during the time that the dimmer is open The dimensioning of the circuit ge
11. 1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 4 of 24 NXP Semiconductors UM10341 1 Table 1 Specifications SSL2101 SSL2102 12 W LED driver Power Factor 120 V AC 230 V AC Switching frequency Dimming range Board dimensions Operating temperature Isolation voltage Input voltage load current dependency 0 99 0 94 0 90 60 75 kHz 100 0 103mm x 50mm x 20mm 0 to 85 Celsius 4 KV 5 6 in the range of 130 V AC to 110 V AC 3 3 in the range of 250 V AC to 210 V AC Comment at 15 W output power at 15 W output power at 11 W output power LxWxH Between primary and secondary circuit 5 Board photos Fig 3 Demo board top UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 5 of 24 NXP Semiconductors UM10341 1 SSL2101 SSL2102 12 W LED driver Fig 4 Demo board bottom 6 Dimmers UM10431_1 Several TRIAC based dimmers have been tested by NXP Semiconductors As different dimmers have different specifications the dimming performance of the board may vary Table 2 shows the range of dimmers that have been tested with the board Table 2 Dimmer selection Manufacturer Type Voltage V Power range Load Min dimming AC W range Opus 852 390 230 60 400 Ha Inc 0 6 Opus 852 392
12. 10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 3 of 24 NXP Semiconductors U M1 0341 1 SSL2101 SSL2102 12 WLED driver K2 Pin1 LED Pin2 LED K1 K1 Pin 1 L Pin2 Earth Pin3 N u fks K3 Pin1 LED Pin2 LED Pin3 LED Pind LED Pind LED Pin6 LED Fig 2 Board connection diagram If a galvanic isolated transformer is used it should be placed in between the AC source and the dimmer demo board Connect a user defined LED string to the 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 P1 can be connected to the metal casing for grounding 4 Specifications Table 1 gives the specifications for the SSL2101 2102 12 W LED driver Table 1 Specifications Comment AC line input voltage 85 V AC to 276 V AC Board has been optimized for 230 V AC or 120 V AC 10 variation Output voltage LED voltage 9 V DC to 23 V DC Output voltage protection 25 V DC Output current LED current 400 mA to 800 mA Adjustable with trimmer Output voltage load current lt 4 Volt in regulated range See attached graphs dependency Current ripple 150 mA at 500 mA E Maximum output power LED 17 W At Vout 21 V E power Efficiency 70 78 At tamb 25 C See attached graphs UM10431_
13. 28 R22 Resistor 330 Q 0 1 1 Free 1 29 R23 Resistor 3 9 KQ 0 25 5 Free 1 30 R24 Resistor 3 9 KQ 0 1 5 Free 1 31 R25 Resistor 100KQ 0 25 5 Free 1 32 R26 Resistor NP Free 1 33 C1 Capacitor 470 pF Cer 10 1KV DEBB33A471KC1B Murata 1 34 C2 Capacitor 100 nF Poly 10 400 NRM S104K400F NIC 1 35 C3 Capacitor 330 nF Poly 10 400 NRM S334K400F NIC 1 36 C4 Capacitor 330 nF Poly 10 400 NRM S334K400F NIC 1 37 C5 Capacitor 4 7 uF Poly 10 63 B32560J475K Epcos 1 38 C6 Capacitor 2200 uF 105 10 25 2222 021 16222 Vishay 1 39 C7 Capacitor 4 7 uF 105 10 25 Free 1 40 C8 Capacitor 330 pF Cer 5 Free 1 41 C9 Capacitor 10 uF 105 10 25 Free 1 42 C10 Capacitor 2 2 nF Cer 10 4K DECE33J222ZC4B Murata 1 UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 16 of 24 NXP Semiconductors U M1 0341 1 SSL2101 SSL2102 12 W LED driver Table 4 Bill of materials 120 V AC Part Ref Part Value Pwr Tol Volt Package Type Manuf Amount No Des 43 C11 Capacitor 10 nF Cer 10 25 Free 1 44 L1 Inductor 680 uH 744776268 Wurth 1 45 L2 Inductor 330 uH 744776233 Wurth 1 46 L3 Inductor 100 uH 74477120 Wurth 1 47 TX1 Transformer N87 3F3 5 EFD25 750340505 Wurth 1 48 D1 Rect Bridge 2A SO 4 DBLS205G Taiwan semi 1 49 D2 TVS diode 600 W P6KE270A Fairchild 1 50 D3 Diode 1 A 800 V HER107 Taiwan semi 1 51 D4 Zener 270 V BZT03 C220 Vishay 1 3 W 52 D5 Diode 1 800 V HER107 Taiwan semi 1 53 D6 Diode 3 A 100 V SK310A Taiwan semi 1
14. SL2101 SSL2102 12 W 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 General 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 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 medical military aircraft space or life support 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 UM10431_1 dam
15. The converter sets its duty factor and converter frequency accordingly 8 Board optimization UM10431_1 8 1 8 2 The following modifications can be done in order to meet different customer application requirements Changing the output voltage and LED current One of the major advantages of a flyback converter over other topologies is that it is suitable for driving other output voltages Essentiality changing the winding 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 efficiency between 80 for high output voltages like 60 V down to 50 for low output voltages like 3 V At low voltages synchronous rectification might become advisable to reduce losses The NXP TEA1791 can be applied for this purpose For exact calculations of transformer properties and peak current we refer to application note AN10754_1 How to design an LED driver using the SSL2101 and the excel spreadsheet that goes with it Changing the output ripple current The output current ripple is mostly determined by the LED voltage the LED dynamic resistance and the output capacitor Whilst the value of C6 has been chosen to optimize capacitor size with light output A
16. UM10341_1 SSL2101 2102 12 W mains dimmable LED driver Rev 00 01 28 April 2009 User manual Document information Info Content Keywords dimmable SSL2101 SSL2102 SSL1523 driver Mains supply AC DC conversion LED driver User manual Abstract This document is a user manual for the SSL2101 SSL2102 mains dimmable 12 W LED driver demo boards founded by Philips NXP Semiconductors U M1 0341 1 SSL2101 SSL2102 12 WLED driver Revision history Rev Date Description 01 lt tbd gt First draft Contact information For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 2 of 24 NXP Semiconductors U M1 0341 1 SSL2101 SSL2102 12 WLED driver 1 Introduction The SSL2101 2102 12 W LED driver is a solution for a professional application with multiple high power LEDs that requires galvanic isolation and a safe output voltage It is mains dimmable for both forward phase TRIAC dimmers and reverse 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 LED lighting for bathrooms etc The design gives an example of how to make a drive that is suitable for small form factor applications like retrofit lamps 2
17. a When the voltage on both these pins is below a certain value typical 52 V the Spieea switch closes providing a current path that loads the dimmer during zero voltage crossing This resets the dimmer timer When the voltage on both these pins is above 52 V and the voltage on the lIsens pin is above 100 mV the weak bleeder switch closes Using Q3 this current is boosted and provides a current path that loads the dimmer when the converter draws insufficient current to have the dimmer latching stable Whilst the strong bleeder is always enabled the weak bleeder will activate only when 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 See Figure 6 and Figure 7 that show bleeder voltage versus time in dimmed and un dimmed position low voltage active NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 8 of 24 NXP Semiconductors U M1 0341 1 SSL2101 SSL2102 12 WLED driver a P1 rms C4 P2 rms C1 P3 mean Math P4 PS P6 145 MA Cd Timebase 0 00 ms Trigger CH 2 00 msidiv Auto 200 kS 10 MS s f Edge Positive 50 0 Vidiv 100 mA div 0 0 mA offset 2 256 mA LR CES ERA DS 1 MA 1285 Vv pay 128 5 Vg ay 257 mA Fig 6 Dimmed bleeder operation a Measure P1 rms C4 P2 rms C1 P3 mean Math P4 P5 P6 value 132 3
18. age 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 17 3 Licenses Purchase of NXP lt xxx gt components lt License statement text gt replace by text inset t001lic lt 1nn gt 17 4 Patents Notice is herewith given that the subject device uses one or more of the following patents and that each of these patents may have corresponding patents in other jurisdictions lt Patent ID gt owned by lt Company name gt 17 5 Trademarks Notice All referenced brands product names service names and trademarks are the property of their respective owners lt Name gt is a trademark of NXP B V NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 23 of 24 NXP Semiconductors UM10341 1 18 Contents SSL2101 SSL2102 12 W LED driver 1 Introduction 2 Safety warning 3 Connecting the board 4 Specifications 5 Board photos 6
19. als 230 V AC Par Ref Part Value Pwr Tol Volt Package Type Manuf Amount t Des No 1 K1 Conn 3pin 2u ang m SL 5 08 3 90 Weidmuller 1 2 K1 Conn 3pin 2u f BL 5 08 3 Weidmuller 1 3 K3 Conn 6pin 1u f BL3 36Z Fischer 1 4 K2 Conn 2pin 2u ang m SL 5 08 2 90 Weidmuller 1 5 K2 Conn 2pin 2u f BL 5 08 2 Weidmuller 1 6 F1 Fusistor 6 8E 1W 10 Free 1 7 R1 Resistor 39 Q 1W 5 Free 1 8 R2 Resistor 39 Q 1W 5 Free 1 9 R3 Resistor 1 KO 2W 5 Free 1 10 R4 Resistor 470KQ 0 25 1 Free 1 11 R5 Resistor 470KQ 0 25 1 Free 1 12 R6 Resistor 10 KO 1W 5 200 Free 1 13 R7 Resistor 10 KO 1W 5 200 Free 1 14 R8 Resistor 2 2 KO 1W 5 200 Free 1 15 R9 Resistor 22K02 1W 5 200 Free 1 16 R10 Resistor 0 40 1W 1 Free 1 17 R11 Resistor 33 KQ 0 25 5 200 Free 1 18 R12 Resistor 15 0 1W 5 200 Free 1 19 R13 Resistor 100KQ 0 1 1 200 Free 1 20 R14 Resistor 22 KO 0 1 1 Free 1 21 R15 Resistor 470K 0 1 1 Free 1 22 R16 Resistor 4 7 KO 0 1 1 Free 1 23 R17 Resistor 12 KO 0 1 1 Free 1 24 R18 Resistor 0 3 0 Iw 1 Free 1 25 R19 Resistor 10 KO 0 1 5 Free 1 26 R20 Resistor 50 KQ 0 1 5 Horizontal Bourns 1 Lin 27 R21 Resistor 22 KO 0 1 1 Free 1 28 R22 Resistor 330 Q 0 1 1 Free 1 29 R23 Resistor 470 Q 0 25 5 Free 1 30 R24 Resistor 3 9 KQ 0 1 5 Free 1 31 R25 Resistor 470KQ 0 25 5 Free 1 32 R26 Resistor 10 KQ 0 1 5 Free 1 33 C1 Capacitor 470 pF Cer 10 1K DEBB33A471KC1B Murata 1 34 C2 Capacitor 150 nF Poly 10 400 NRM S154K400F NIC 1 35 C3 Capacitor 150 nF Poly 10 400
20. e 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 At the 230 V AC design using 150 nF capacitors a power factor of 0 9 is reached at 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 made of Q1 Q2 Using R20 the current level can be set The same feedback loop is also used for overvoltage protection If the LED voltage exceeds 23 V a current through R19 and D9 will start running The current through the opto coupler IC2 will pull down the PWM_Limit and brightness pin At a value below 400 mV the on time is zero The feedback loop has proportional action only and the gain is critical because of phase shift caused by the converter and C6 The relation between PWM_Limit and output current is quadratic in nature The resulting 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 make a voltage divider and C9 filters the resulting signal
21. factor feedback is not dominant anymore This last part occurs at output voltages below 13 V In this area constant output power becomes the dominant control mechanism Changing the winding ratio of the transformer to match the output load will also change this load curve NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 11 of 24 NXP Semiconductors U M1 0341 1 SSL2101 SSL2102 12 WLED driver 8 5 Multiple driver support It is possible to attach multiple converters to a single dimmer At the use of TRIAC dimmers the inrush current will rise though not proportionally to the number of converters Transistor dimmers are more suitable for usage with multiple converters because the dimming range will increase due to the added bleeder action and there is no inrush current UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 12 of 24 SSL2101 SSL2102 12 W LED driver UM10341_1 NXP Semiconductors 9 Board schematic saal OL Wud C gt TUMA UWNNMd Hj gr eue BY my sseuybug Hy snog OND AN OND srjNINH0 Peslas SNIVW OL Board schematic diagram Fig 8 NXP B V 2009 All rights reserved UM10431_1 Rev 00 01 28 April 2009 13 of 24 User manual NXP Semiconductors UM10341 1 10 Bill of materials BOM SSL2101 SSL2102 12 W LED driver Table 3 Bill of materi
22. herein have been included in section Legal information NXP B V 2009 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 28 April 2009 Document identifier UM10431_1
23. nerating 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 like 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 waisted in order to drive the dimmer and not to produce light On the demo board the weak bleeder value R6 R7 is choosen is such way that losses are still acceptable about 2 W to 3 W and only occur in dimmed position The voltage drop with some transistor dimmers is however not sufficient to cause full dimming range control minimum 10 instead of lt 1 because at the SSL2101 the dimming range is sensed by taking the average rectified voltage as input To compensate for the reduced voltage difference voltage detection can be made more sensitive by replacing R4 with a Zener diode like the BZV85 C200 for 230 V AC or the BZV85 C68 for 120 V AC applications Because of increased sensitivity the dimming curve when using TRIAC dimmers will also be steeper and shifted Changing the load curve The load curve can be divided into two regions A part where the control loop limits the duty cycle of the converter and where the output current is regulated and a part where the duty
24. w wh Ta To Ta 230 V AC efficiency curves 80 0 ng e 500 mA 800 mA 700 mA 75 0 70 0 65 0 60 0 55 0 9 11 15 Uload 17 19 21 23 13 Fig 14 230 V AC effeciency curve 14 Appendix C Input voltage dependency O QA 120 V AC input voltage dependency 230 V AC input voltage dependency lout A lout A 100 105 110 115 120 125 130 130 135 200 205 210 215 220 225 230 235 240 245 250 Vin V Vin V Fig 15 Input voltage output current dependency UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 21 of 24 NXP Semiconductors U M1 0341 1 SSL2101 SSL2102 12 W LED driver 15 Appendix D Mains conducted harmonics Table 7 Mains conducted harmonic values Harmonic 230 V AC 50 Hz Amplitude 120 V AC 60Hz Amplitude 1 100 100 2 0 0 3 13 2 9 4 0 0 5 3 8 2 1 6 0 0 1 7 1 2 1 9 8 0 1 0 1 9 3 2 2 10 0 0 1 11 0 5 0 12 0 0 1 13 2 5 1 3 14 0 0 1 15 1 8 1 2 16 0 0 1 17 2 1 0 5 18 0 0 19 2 9 0 1 20 0 0 THD 15 94 10 80 PF 0 94 0 98 16 References 1 AN10754_1 How to design an LED driver using the SSL2101 2 SSL2101 Datasheet 3 SMPS IC for dimmable LED lighting UM10431_1 NXP B V 2009 All rights reserved User manual Rev 00 01 28 April 2009 22 of 24 NXP Semiconductors UM10341 1 17 Legal information S
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