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UM10417 - NXP Semiconductors

1. 20 0 102 1071 1 10 102 f MHz 1 Average 2 Peak value 3 EN 55015 peak upper limit 4 EN 55015 average upper limit Fig 14 EMC Pre compliance N phase against EN 55015 and peak UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 20 of 23 NXP Semiconductors UM10417 Demo board for mains 17 W LED driver and dimmer using the SSL2102 9 6 AC Mains harmonics 30 a i Class C level Hi 650mA 20 10 i Ba ls Lal Be bok Fig 15 AC Mains harmonics at 650 mA output current IEC 61000 3 2 14 harmonic UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 21 of 23 NXP Semiconductors UM10417 Demo board for mains 17 W LED driver and dimmer using the SSL2102 10 Legal information 10 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 acc
2. 600 500 400 15 5 18 5 21 5 24 5 27 5 30 33 5 5 DC output voltage V Test board A Test board B Test board C Test board D Test board E annaa oa ao weer ve a Fig 8 Input voltage stability 019aaa556 800 output current mA 600 400 200 40 60 80 100 120 140 150 AC input voltage V Fig 9 Output voltage stability with 5 LEDs UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 17 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 9 2 Efficiency graphs 019aaa557 815r aaa efficiency at 120 V AC 80 5 79 5 78 5 775 4 5 6 7 8 9 10 number of LEDs 1 Test board A 2 Test board B 3 Test board C 4 Test board D 5 Test board E Fig 10 Efficiency at 120 V AC 019aaa558 90 efficiency at typical load 70 50 30 10 40 60 80 100 120 140 160 AC input voltage V Fig 11 Efficiency at typical load UM10417 All information provided in this document is subject to legal
3. SMD 0805 R8 10 KQ 0 125 W 5 SMD 0805 R9 51 KQ 0 25 W 5 200 V SMD 1206 R10 15 kQ 0 125 W 1 SMD 0805 R11 8 2 KQ 0 125 W 1 SMD 0805 R12 R18 100 KQ 0 125 W 1 SMD 0805 R13 390 kQ 2 W 5 DIP R14 3 3 Q 3 W 5 400 V SMD 2512 R15 220 Q 2 W 5 400 V SMD 2512 R16 82 KQ 0 125 W 1 SMD 0805 R17 6 8 Q 2 W 5 400 V SMD 2512 R18 100 KQ 0 125 W 1 SMD 0805 R19A 1 Q 0 25 W 1 SMD 1206 R19B 0 75 Q 0 25 W 1 SMD 1206 R20 1 KQ 0 125 W 1 SMD 0805 R21 100 KQ 0 125 W 5 SMD 0805 R22 10 Q 0 125 W 5 SMD 0805 R23 10 KQ 0 125 W 5 SMD 0603 R24 6 8 KQ 0 125 W 5 SMD 0603 R25 0 22 Q 0 25 W 1 DIP R26 10 KQ 0 125 W 1 SMD 0603 R27 51 KQ 0 125 W 1 SMD 0603 R29 3 9 KQ 0 125 W 1 SMD 0603 R30 0 9 0 125 W 5 SMD 0603 R31 1 KQ 0 125 W 5 SMD 0603 2 R32 1 KQ 0 125 W 1 SMD 0603 C1 100 nF MKT 10 400 V C2 C3 330 nF MKT 10 400 V C4 4 7 uF 105 C 10 50 V C5 330 pF Cer 10 50 V SMD 0603 C6 100 nF MKT 10 63 V C7 100 nF Cer 10 50 V SMD C8A 10 uF 105 C 10 50 V C9 C10 1000 uF 105 C 20 35 V MCRH35V108 M13X21 Multicomp C11 2 2 nF Y 20 400 V UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved U
4. eae ago Fig 6 Bleeder operation The demo board is optimized to work at a power factor above 0 9 In order to achieve this the flyback converter operates during the MOSFET on time The output power of the flyback converter is buffered by capacitors C9 and C10 This configuration gives the circuit a resistive input current behavior in undimmed mode see curve li in Figure 6 In dimmed mode the dimmer latch and hold current must be maintained and a damper must be added to dampen the inrush current and dissipate the electric power stored in the dimmer s LC filter A serial resistor can be used as a damper at power ranges of less than 10 W this however is inefficient at higher power ranges due to the significant voltage drop and dissipation that will occur from the supply current to the flyback converter All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 10 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 Darlington transistor Q4 provides the necessary high gain and will be in saturation as long as its base voltage is above the emitter voltage plus the base emitter voltage Vge The voltage across emitter resistor R14 increases with the current When the emitter voltage rises above the threshold Q4 stops saturation turns off and the current is then limited b
5. BCM61B Qa 10 kQ 51 kQ vee VCC 5 T GND 12 16V Ay h GND 6 SSL2102 45 SOURCE R19B 3 4 R32 Q aa i GND x GND 0 75 Q A SEND 1kQ LSGND 3 RE BRIGHTNESS AUX fet D 7 5KQ R11 100 kQ gt ate Al a g RC2 3 ISENSE z 15ko 7 pu 8 2 KQ RC PWMLIMIT T 50V T 109 D7 4 N a 7 R12 wi C5 100 kQ T 330 pF F vcc 5N3 t ines R20 D8 C8A a IC3 A iko z0 i0pF m 33 V 50V o a a R13 R16 VACT gt S E lt 390 kQ 82 kQ 2 L 6 Dg ae R18 c7 v 100 nF ZD 63V 43V NPN 100 KQ 100 nF 4 R14 R15 R17 c11 RGND gt JH Q 3 3 O 2 W 220 9 2 W 6 8 Q 2 W 2 2 nF 400 V AC 10 Q 10 Q A0Q 470 9 470 Q 20 9 20 Q SGND 3 it ES 019aaa554 3 9 c HA Q gt p Optional 7 Some resistor values are shown with format x x x which represent the values required of resistors connected in parallel y t Demo board 120 V AC schematic 9 SIOJONPUODIWIS dXN ZLPOLINN NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 8 PCB components Table 3 Demo board 120 V AC components Designator Description Part identifier Manufacturer R1 2 2 KQ 2 W 5 200 V SMD 2512 R2 700 KQ 0 25 W 1 200 V SMD 1206 R3 R4 2 2 KQ 3 W 5 400 V SMD 2512 R5 4 7 KQ 2 W 5 400 V SMD 2512 R6 7 5 KQ 0 125 W 5
6. 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 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 su
7. disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 18 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 9 3 Temperature stability The temperature stability depends on the LED heatsink and the lamp s form factor 9 4 Power factor 1 1 00 019aaa559 power factor 0 95 2 0 90 0 85 20 0 21 5 23 0 24 5 26 0 27 5 29 0 DC output voltage V 5 LEDs 6 LEDs 7 LEDs 8 LEDs 9 LEDs 10 LEDs Fig 12 Power factor UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 19 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 9 5 EMC Pre compliance 019aaa560 100 leve dBuV 80 60 3 2 40 1 20 ioe 1071 1 10 102 f MHz Average Peak value EN 55015 peak upper limit EN 55015 average upper limit Fig 13 EMC Pre compliance L phase against EN 55015 and peak 019aaa561 100 level dBuV 80 60 3 40
8. 010 All rights reserved User manual Rev 1 30 September 2010 3 of 23 NXP Semiconductors UM10417 2 Specification Demo board for mains 17 W LED driver and dimmer using the SSL2102 Table 1 Demo board specification Parameter AC line input voltage Output voltage LED voltage Output voltage protection Output current LED current Input voltage load current dependency Output voltage load current dependency Temperature stability Current ripple Maximum output power LED power Efficiency Power factor at input voltage of 120 VAC Switching frequency Dimming range Board dimensions Operating temperature EMC Compliance Value 0 V to 150 V AC 60 Hz 17 V to 33 VDC 33 V DC 600 mA typical 2 7 to 3 2 input voltage from 110 V to 150 VAC 8 9 to 9 1 output voltage from 19 V to 30 VDC 1 9 to 2 4 from 100 C to 20 C acceleration life test of IC over 75 000 hours 15 at 550 mA 19 W 76 to 82 gt 0 95 40 kHz to 60 kHz 100 to 0 82 mm x 62 mm x 35 mm 0 C to 105 C FCC15 and IEC 61000 3 2 pre compliant EN 55015 and IEC 61000 3 2 pre compliant Comment 120 V AC model see Figure 7 on page 14 see Figure 7 on page 14 typical value depends on load at Tamb 25 C depends on output load and input voltage see Figure 10 on page 18 and Figure 11 on page 18 see Figure 12 on page 19 at 120 V AC input voltage for tria
9. 25 120 600 0 GE 52129 120 600 0 a 019aaa551 output current mA 600 1 2 3 4 400 5 6 200 0 40 60 80 100 120 40 160 AC input voltage V The output current can be set at a fixed maximum of 590 mA with 5 LEDs as shown by curve 1 5 LEDs 6 LEDs 7 LEDs 8 LEDs 9 LEDs 10 LEDs Fig 5 Typical AC input voltage dimming curves UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 8 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 5 Functional description UM10417 Refer to Figure 7 Demo board 120 V AC schematic on page 14 The AC mains LED driver IC SSL2102 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 a current flows which is stored as energy in transformer TX1 This current is interrupted either when the duty factor exceeds the 75 maximum level set by pin PWMLIMIT or when the voltage on pin SOURCE exceeds 0 5 V In the next cycle the energy stored in the transformer discharges via D6 to output capacitors C9 and C10 and finally absorbed by the load The flyback converter frequency is set by an internal oscillator whose timi
10. UM10417 Demo board for mains 17 W LED driver and dimmer using the SSL2102 Rev 1 30 September 2010 User manual Document information Info Content Keywords SSL2102 AC mains supply dimmable LED driver AC DC conversion Abstract This User manual describes a demonstration demo board for evaluating an AC mains LED driver with a dimmer for 17 W PAR38 LEDs using the SSL2102 It also describes key features and connections to aid the design of LED drivers for typical applications NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 Revision history Rev Date Description 1 20100930 Initial version Contact information For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 2 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 1 Introduction This User manual describes a demonstration demo board for evaluating an AC mains LED driver with a dimmer for 17 W PAR38 LEDs using the SSL2102 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 120 V AC 60 Hz The res
11. c dimmer LXBXH at 120 V AC input voltage see Figure 13 on page 20 and Figure 14 on page 20 UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 4 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 A4 M be ee 019aaa548 Fig 2 Demo board top view UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 5 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 019aaa549 Fig 3 Demo board bottom view UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 6 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 3 Demo board connections UM10417 The demo board is optimized for an AC mains source of 120 V 60 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 typical load The output voltage is limited to 33 V When attaching a LED load to an operational board hot plugging an inr
12. ed for overvoltage protection If the LED voltage exceeds 36 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 proportional action only and the gain is critical because of phase shift caused by the flyback converter and C6 The relationship between pin PWMLIMIT and the output current is quadratic in nature The resulting output current spread will be 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 UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 11 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 6 System optimization The modifications described in this section can be applied to achieve customer application specifications 6 1 Changing output voltage and LED current One of the major advantages of a flyback converter over other topologies is its su
13. immers 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 internal dimmer losses 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 voltage drop would result in very inefficient operation at low output power levels since most of the energy is wasted driving the dimmer instead of producing light On the demo board the weak bleeder resistor values of R3 and R4 are chosen so that losses are within acceptable limits and only occur in dimmed mode at the end of the phase The voltage drop in some transistor dimmers is however not sufficient to allow full control of the dimming range whereas the SSL2102 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 Because of increased sensitivity the dimming curve will be steeper and shifted when using triac dimmers 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 700 mA but losses will increase with higher current levels Note that resistors R19A B limit the p
14. itability for driving different output voltages In essence 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 transformation ratio and cause higher secondary losses In practice a mains dimmable flyback converter will have an efficiency of between 85 for higher output power and voltage such as 60 V down to 60 for lower output power and voltage such as 1 W and 3 V respectively At lower voltages synchronous rectification may be advisable to reduce losses after high current is rectified synchronous rectification controllers TEA1761 and TEA1791 from NXP Semiconductors can be used for this purpose Calculations for transformer properties and peak current are described in detail in application note AN10754 SSL2101 and SSL2102 dimmable mains LED driver The output voltage protection is set by the value of D11 Changing the value of D11 allows the the LED driver to be adapted to a specific output load and to reduce the load s hot swap inrush current 6 2 Changing the output ripple current The output ripple current is mainly determined by the LED voltage the LED dynamic resistance and the output capacitor Whilst the values of C9 and C10 are chosen to optimize capacitor size with LED brightness A ripple of 15 will result in an expected deterioration of LED b
15. lied 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 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 UM10417 All information provided in this document is subject to legal disclaimers 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
16. ng is controlled by external RC components connected to pins RC and RC2 The frequency can be set by pin BRIGHTNESS to an upper or a lower value The flyback converter frequency range is set by the ratio between R11 and R12 The two other switches in the IC are called weak bleeder pin WBLEED and strong bleeder pin SBLEED When the voltage on both these pins is below a certain value typically 52 V the strong bleeder switches on to provide a path for load current to the dimmer during zero voltage crossing resetting the dimmer timer When the voltage on both pins is above 52 V and the voltage on pin ISENSE is above 100 mV the weak bleeder is switched on by transistor Q3 This supplies a boosted hold current to the dimmer to maintain stable latching during the periods when the flyback converter draws insufficient current Figure 6 shows the bleeder voltage against time in dimmed and undimmed modes All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 9 of 23 NXP Semiconductors UM1 041 T UM10417 Demo board for mains 17 W LED driver and dimmer using the SSL2102 019aaa552 a Dimmed mode 019aaa553 b Undimmed mode 1 Demo board input current lin 2 Rectified AC mains voltage Vin after bridge BD1 3 Q3 Collector voltage Voco weak bleeder action 4 Strong bleeder current Spieeg Sy iy
17. of release 30 September 2010 Document identifier UM10417
18. ppliers 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 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 10 3 Trademarks Notice All referenced brands product names service names and trademarks are the property of their respective owners NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 22 of 23 NXP Semiconductors UM10417 Demo board for mains 17 W LED driver and dimmer
19. rightness of less than 1 The size of the buffer capacitor can be determined from Equation 1 ed 1 c10 CI x AI 6 fuer Rdynamie Example with a ripple current of 5 AC mains frequency of 50 Hz and a dynamic 20 resistance of 0 6 the resultant value of C9 C10 is 300x06 111 pF With a ripple current of 25 and a dynamic resistance of 6 Q the resultant value of C9 4 C10 is TS 2200 uF 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 UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 12 of 23 NXP Semiconductors UM1 041 T UM10417 6 3 6 4 Demo board for mains 17 W LED driver and dimmer using the SSL2102 Adapting to high power reverse phase transistor dimmers Reverse phase transistor dimmers differ in two ways that can be beneficial e Because of the negative phase there is no inrush current when the dimmer triggers With 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 With transistor dimmers this steep charge is missing the input capacitors will have less stress and the input circuit is less prone to audible noise e Transistor d
20. rimary peak current and thus the maximum output power All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 13 of 23 OLOZ 4equiaides og L AY jenuew asn SJOWUIE OSIP ea 0 JOaIqNs S JUBWINDOP S14 UI PEPIAOIG UONEWOJU y EZ JO HL ZLPOLWN pamasa syu Ily 0LOZ A d dXN 1 Fig 7 a e o I i ez C13 Ri 2 2 nF 2 2 KQ Oo 250v Llow a D3 BCI L2 u D6 13 F Q RGND T Pt 680 pH FerCoil T T PRE gt l 100 pH T R ray C1 DIODE04 05 co c10 100 nF D1 C2 c3 aL C8 N 290V 1 0 33 uF 0 33 uF Fo b 2M 1000 uF 1000 pF Y N4 N5 35V 35V o i il WV 180v N2 i O L L L 3W 3 8 R25 VACT 4e gt 5 R7 Te ee AEAU 1 sexo oe noa 0 22 0 0 25 W XL 6 8 K B KOJI6 8 kQ g nt eee 3 R3 R5 ZX 05 D11 i o 22kQ 4 7 kQ 2W ZD33 R27 6 8 kQ 6 8 kQ 6 8 kQ 10 kQ 10 kQ ici D10 R30 R26 51 kQ 3 ROND seon DRAN oa TOK pag R31 o 2 GND 3 GND 1kQ 2 1 3 9kQ 9 R8 R9 WBLEED GND R19A c12 7 14 4 4 _ lt V Ic38 100 pF
21. ser manual Rev 1 30 September 2010 15 of 23 NXP Semiconductors UM10417 Table 3 Demo board for mains 17 W LED driver and dimmer using the SSL2102 Demo board 120 V AC components continued Designator Description Part identifier Manufacturer C12 100 uF 105 C 20 16 V C13 2 2 nF MKT 10 250 V L2 680 uH 10 SMD WE PD2 744776268 Wurth L3 100 uH 10 SMD WE PD 74477720 Wurth TX1 transformer 1m E25 25 8 750340772 WE Midcom BD1 rectifier bridge SMD DB107S D1 TVS diode P6KE250 optional D3 diode HER107 D4 Zener 3 W 180 V BZT03C180 D5 diode HER107 D6 diode HER303 D7 diode SMD BAS16J NXP D8 Zener 33 V SMD SOD66 BZX84J B33 NXP D9 Zener 4 3 V SMD SOD80C BZX84J B4V3 NXP D10 diode SMD BAS16J NXP D11 Zener 33 V SMD SOD66 BZX84J B33 NXP Q3 transistor PNP TO 92 MPSA92 Q4 transistor NPN TO 220 ST901T IC1 controller SMD SOW 20 SSL2102 SSL2102 NXP IC3 optocoupler SMD SO 4 PC817 PC817 IC4 dual NPN SMD SOT143B BCM61B BCM61B NXP UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 16 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 9 Test results 9 1 Input output stability 019aaa555 700 output current mA
22. ulting design is a trade off between high power factor efficiency and dimmer compatibility combined with high output stability and ElectroMagnetic Compliance EMC compliance 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 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 Thus it is recommended to always provide galvanic isolation of the mains phase using a variable transformer Isolated and non isolated devices are identified by the following symbols a Isolated Fig 1 Isolated and non isolated symbols QQ Ok isolated non isolated 019aaa546 019aaa547 b Non isolated UM10417 All information provided in this document is subject to legal disclaimers NXP B V 2
23. uracy or completeness of information included herein and shall have no liability for the consequences of use of such information 10 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 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 supp
24. ush peak current will occur due to the discharge of output capacitors C9 and C10 Note that frequent discharges may damage or deteriorate the LEDs Remark It is recommended to mount the board in a shielded or isolated box for demonstration purposes dimmer 019aaa550 Fig 4 Demo board connections If a galvanic isolated transformer is used this should be placed between the AC source and the demo board Connect a series of between 5 and 10 LEDs to the output as shown in Figure 4 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 1 30 September 2010 7 of 23 NXP Semiconductors UM1 041 T Demo board for mains 17 W LED driver and dimmer using the SSL2102 4 Dimmers NXP Semiconductors has tested the performance of several triac based dimmers having different specifications The range of dimmers which have been tested with the demo board are given in Table 2 Table 2 Tested dimmers An incandescent lamp is used as load Manufacturer Type AC Voltage Power range Low dim level V W Lutron TG 600PH WH 120 600 0 Levitron L12 6641 W 120 600 0 Levitron LO02 700 W 120 600 0 Levitron 6602 IW 120 600 0 Levitron 6683 W 120 600 0 Levitron R12 6631 LW 120 600 0 Cooper 6001 120 600 0 Lutron S 600PH 120 600 0 GE 18019 120 600 0 GE 180
25. using the SSL2102 11 Contents 10 1 10 2 10 3 11 Introduction 000 0c c eee eee eee 3 Specifications lt i wcidew ees se 4 Demo board connections 7 DIMMEClS i322 2G the ee aa ie ae nse 8 Functional description 00000 9 System optimization 55 12 Changing output voltage and LED current 12 Changing the output ripple current 12 Adapting to high power reverse phase transistor dimmers 13 Changing the output current 13 Demo board schematic 14 PCB componenis 0 eeeeeees 15 TEStFeSUNS ieii oad oe ior anaana 17 Input output stability 17 Efficiency graphs 0 0 ee 18 Temperature stability 19 Power factor 0 0000 cece eee eee 19 EMC Pre compliance 5 20 AC Mains harmonics 21 Legal information 00 eeeeeeee 22 Definitions 0 ccc eee eee 22 Disclaimers es 5 bee oe ex ee een ek Bees 22 Trademarks 0 0 eee 22 CONTENNS isos ie kanaka ede es Se eee 23 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 2010 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
26. y R15 The values of D9 and R13 affect efficiency and power factor and must be chosen with care to ensure consistent operation over the input voltage range from 120 V to 230 V AC 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 efficiency the major serial damping is activated only when there is a peak inrush current active inrush current limiter In normal operation 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 600 mA The flyback converter input circuit must have a filter that is partially capacitive C2 L2 C3 C13 and L1 form a filter that blocks most of the disturbance generated 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 ouffer reduces the power factor With the 120 V AC design using 330 nF capacitors a minimum power factor of 0 98 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 us

UM10417 - NXP Semiconductors

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