STEVAL-ILL019V1 offline RGGB LED driver demonstration board
Contents
1. Figure 14 PWM dimming 50 Figure 15 PWM dimming 10 PWM dimming 50 PWM dimming 10 T LED current F LED current 4 F J eo a LED valtage ui i i a f T i kaha lt i TILL ern NA ran Li ii ti a f i 2 mo 100 mA H 1 ms 10 0 V 2 1 no 100 mA 1 ms 10 0 duty 2 49 97 4 duty 2 18 18 Figure 16 PWM dimming 1 Figure 17 PWM dimming 1 zoom PWM dimming 1 PWM dimming 1 zoom LED current F LED current LED voltage LED voltage WT 4 2 1 ms 190 mA H 1 ms 10 0 V 2 20 ps 180 mA 2a ps 10 0 V duty 2 1 80 duty 2 3 5 Input and output electrical waveforms The LED current measured for one channel channel 4 with 9 blue LEDs is shown in Figure 18 The LED average current is 350 mA the inverted buck converter switching frequency is 189 kHz and the peak to peak LED current ripple is 57 8 mA Figure 19 shows the input current and voltage waveforms for the input voltage 110 V AC The default load of 30 W RGGB LEDs is used for this measurement In this case the STEVAL ILLO19V1 has PF 0 995 and THD 8 5 Figure 20 shows the input current and voltage waveforms for the input voltage 230 V AC The default load of 30 W RGGB LEDs is again used f2. THD 18 18 16 16 14 14 12 12 10 10 30 LEDs T 8 8 20 LEDs He 6 6 4 4 2 2 0 T T T T T T T T T 0 90 110 130 150 170 190 210 230 250 265 Input voltage V AM07313 Figure 10 Efficiency measurement Efficiency 100 0 100 0 90 0 90 0 80 0 80 0 OK gt 0 70 0 gt 60 0 60 0 SE o S o 900 50 0 20 LEDS 2 40 0 40 0 wW 30 0 30 0 20 0 M 20 0 10 0 10 0 0 0 T T T T T T T T T 0 0 90 110 130 150 170 190 210 230 250 265 Input voltage V AM07314 Output current for different number of LEDs Thanks to the modified buck converter designed as the current source additional feedback resistors R56 R57 R58 and R59 in the design it is possible to drive a variable number of LEDs The output constant current was checked for different numbers of LEDs connected to the modified buck converter and the result is demonstrated in Table 1 and Figure 11 It is recommended to have the output voltage between 15 V and 38 V in order to keep the output LED current within approximately 5 An established number of LEDs follows the output voltage recommendation and can be easily calculated as the LED forward voltage is a typical parameter written in any LED datasheet Doc ID 17274 Rev 1 ky www BDTIC com ST UM0926 STEVAL ILL019V1 measurements 3 3 Table 1 LED current vs number of LEDs Number of LEDs 4 5 6 7 8 9 10 11 12 13 hen MA 390 362 351 346 3
3. 19 6 Bill of material 21 7 References ice ni cint i CN o at a Ra Ce ae tc nt en EN 24 8 Revision history A dg KA n dese act i i ad eee wane n 24 2 25 Doc ID 17274 Rev 1 ky www BDTIC com ST UM0926 List of tables List of tables Table 1 LED current vs number of LEDs 11 Table 2 Transformer design specifications 18 Table 3 Bill of material STEVAL ILLO19V1 21 Table 4 Document revision history 24 ky Doc ID 17274 Rev 1 3 25 www BDTIC com ST List of figures UM0926 List of figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 4 25 STEVAL ILLO19V1 demonstrationboard 1 Default RGGB LED load usedfortesting 5 J3 connector with manual control circuitry 6 Different color settings using manual color control 6 STEVAL ILLO19V1 block diagram
4. 7 STEVAL ILLO19V1 demonstration board used for measurements 8 Power Factor measurement 9 Power Factor zoom measurement 9 Total Harmonic Distortion THD measurement 10 Efficiency measurement lt ar 0 0 ete 10 Modified buck converter output current 11 High PF flyback converter power capability for Viy DB VAC a 12 High PF flyback converter power capability for Viy 185 VAC 12 PWM dimming uge 13 PWM dimming 10 e ee ea dea Hee Sake eae ee a a tat fa dA eee A e 13 PWM dimming WI IAA WAA EIA 13 PWM dimming 1 zoom IAA Ia aa A a aa 13 LED current measurement AA IIIA AWA 14 Input voltage and current waveforms for Viy 110VAC cn 14 Input voltage and current waveforms for Viy 230 VAC 14 Thermal measurement on the STEVAL ILLO19V1I 15 EN61000 3 2 compliance for input voltage 110 V AC 16 EN61000 3 2 compliance for input voltage 220VNAC ee 16 Quasi peak measurement from 9 KHz to 30 MHZ 16 Average measurement from 150 KHz to 30 MHZ 00000 cece eee 16 Transformer frame dimensions 17 Transformer winding description 18 Win
5. er UM0926 ad User manual STEVAL ILLO19V1 offline RGGB LED driver demonstration board with high PF Introduction The STEVAL ILLO19V1 demonstration board was developed to drive high brightness and power RGGB LEDs used in many different lighting applications Thanks to RGGB LEDs it is possible to easily modify the color of the light change the brightness level implement additional lighting features such as automatic color changes or a blinking mode improve lighting efficiency compared to standard lighting products and finally also achieve significant energy savings Typically RGGB LED applications can be found as decorative lighting in houses or hotels as architectural lighting in stadiums historic buildings bridges and monuments as wall washing shop lighting and in many other special lighting applications The STEVAL ILLO19V1 implements an innovative solution for driving multiple color RGGB LEDs where high Power Factor safety isolation and individual regulation of LED brightness are required A constant current is set to 350 mA Thanks to the microcontroller onboard the output channels are independently controlled by four PWM signals allowing the application users to set any color of the light or create automatic color effects The demonstration board is shown in Figure 1 and its ordering code is STEVAL ILLO19V1 STEVAL ILL019V1 main features Constant LED current 350 mA 4 channels for RGGB LEDs designed on the board Li
6. it is also possible to modify the light effects The RGGB LED brightness can be set manually if the external potentiometers are connected to the board via the connector J3 Figure 5 STEVAL ILLO19V1 block diagram HIGH POWER FACTOR FLYBACK CONVERTER MODIFIED BUCK CONVERTER CH 1 VIN 88V to 48V 5 to 13 LEDs 265 V AC STTH3R02S STPS1H100A A E Bd PF controller L6562AD PF controller L6562AD PWM GENERAT OR 4 channels P1 P2 P3 P4 4 external potentiometers for individual brightness AM00903 Doc ID 17274 Rev 1 7 25 www BDTIC com ST STEVAL ILL019V1 measurements UM0926 3 3 1 8 25 STEVAL ILL019V1 measurements The most important parameters such as electrical behavior thermal behavior dimming function board power capability and standards EN55015 and EN61000 3 2 were measured on the STEVAL ILLO19V1demonstration board shown in Figure 6 and the results are given in the following section Figure 6 STEVAL ILLO19V1 demonstration board used for measurements PF THD efficiency The power factor PF is shown in Figure 7 and Figure 8 Two RGGB LED loads are used for this measurement Firstly the default load of 30 W RGGB LEDs 9 blue LEDs 13 green LEDs and 8 red LEDs was used for the measurement and this load is shown in Figure 2 The second load used for the measurement is 20 W RGGB LEDs 5 blue LEDs 8 green LEDs and 7 red LEDs The power factor is 0
7. IC3 14 25 Doc ID 17274 Rev 1 ky www BDTIC com ST UM0926 STEVAL ILL019V1 measurements Figure 21 Thermal measurement on the STEVAL ILL019V1 PUOMAL ILLO19V1 a ma GEN 20 96 E1 HT 7618 CTIE 838E 0 96 3 7 Standard EN61000 3 2 measurement If the input power for a lighting application is above 25 W then it is required to have an active Power Factor Correction PFC circuit in the final application The high PF flyback converter with the L6562A controller transition mode PFC controller is perfectly suitable for such applications Thanks to this design approach input voltage 110 V AC or input voltage 230 V AC meets the standard EN61000 3 2 as seen in Figure 22 and Figure 23 ky Doc ID 17274 Rev 1 15 25 www BDTIC com ST STEVAL ILL019V1 measurements UM0926 Figure 22 EN61000 3 2 compliance for input Figure 23 EN61000 3 2 compliance for input voltage 110 V AC voltage 230 V AC _ 120 120 z 100 5 S 100 Sx 80 S es Sa 80 So imi So 2 o ZS A m Limit AF m Rea 55 m Real YS 40 95 40 3 5 0 E u ff WI e 1 3 5 7 1 3 5 7 Harmonic order Harmonic order AM07318 AM07319 3 8 EMI measurement EN55015 The norm EN55015 CISPR15 describes the limits and methods of measuring radio disturbance characteristics of electrical lighting and similar equipment The limits of the mains terminal disturbance voltages for q
8. and therefore maximum power capability of the STEVAL ILLO19V1 for the EU input voltage range is 42 W as shown in Figure 13 Figure 12 High PF flyback converter power capability for Vy 88 V AC 50 40 0 45 1 35 0 40 1 30 0 gt 80 125 0 7 3 25 20 0 3 Ul gt 20 1150 OUT 15 10 0 10 5 15 0 0 0 0 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 lour Al AM07316 Figure 13 High PF flyback converter power capability for Vy 185 V AC 50 0 70 0 45 0 1 60 0 40 0 35 0 50 0 e 30 0 40 0 v 25 0 gt la po 9 opo 130 0 9 OUT 15 0 4 10 0 Maximum power Tcomp gt 61 20 0 10 5 0 0 0 0 0 r T r r r r r r T r r 0 0 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 0 11 12 13 lout A AM07317 12 25 Doc ID 17274 Rev 1 ky www BDTIC com ST UM0926 STEVAL ILL019V1 measurements 3 4 Dimming The dimming function on the STEVAL ILLO19V1 was evaluated One output channel channel 4 with 9 blue LEDs of the inverted buck converter was measured Figure 14 to Figure 17 show the output LED current and voltage for brightness levels set to 5096 1096 and 1 Thanks to the inverted buck topology the application can be also completely switched off no current flows to the LEDs because the Power MOSFET is turned off by the PWM signal the L6562A controls the Power MOSFET
9. temperature was checked after one hour with maximum load 35 8 W with 88 V input voltage ambient temperature 25 C The Power MOSFET had a temperature of 61 C and the transformer had a temperature of 60 C The maximum power capability for the EU voltage range 188 V to 265 V AC is also measured refer to Figure 13 The high PF flyback converter is again measured separately using a resistive load connected to the capacitor C10 In this case the maximum power limit is above 35 W as the minimum input voltage was set to 188 V AC Finally a higher input voltage 188 V compared to a wide input voltage range 88 V means that the primary current is lower avoiding transformer saturation and therefore the high PF converter is able to deliver higher power to the load for the EU input voltage range In this case the maximum Doc ID 17274 Rev 1 11 25 www BDTIC com ST STEVAL ILL019V1 measurements UM0926 power capability is limited by the temperature of the power components mainly the transformer and Power MOSFET The maximum Power MOSFET and inductor temperature was selected at 61 C in order to have the same maximum temperature on the transformer and Power MOSFET as that of the wide input voltage range The temperature was measured after 1 hour and the Power MOSFET had a temperature of 59 C and the transformer had a temperature of 61 C for load power of 46 W Efficiency for the inverted buck converter can be again estimated at 90
10. voltage is 3 5 V an LED string with 5 to 11 LEDs per channel must be used The designers must also take into account that the maximum output LED power is 32 W for wide input voltage range 88 V to 265 V AC and 42 W for EU input voltage range 188 V to 265 V AC It is also possible to use only one two or three channels A typical example of how the load with RGGB LEDs can be designed is shown in Figure 2 which is also the default RGGB LED load used for measurements on the STEVAL ILLO19V1demonstration board In this case channel 1 has 6 green LEDs channel 2 has 8 red LEDs channel 3 has 7 green LEDs and channel 4 has 9 blue LEDs This RGGB LED load is just for demonstration purposes and is not available for ordering Figure 2 Default RGGB LED load used for testing Doc ID 17274 Rev 1 5 25 www BDTIC com ST Getting started with the STEVAL ILLO19V1 UM0926 1 2 6 25 The last step after the RGGB LED load connection is to supply the demonstration board with the proper input voltage The output light color is automatically changed as soon as the input voltage is applied to the board via connector J1 Manual color change mode First connect the RGGB LED load to the STEVAL ILLO19V1 as described in the previous section Then connect the potentiometers to the J3 connector as demonstrated in Figure 3 The control connector has three main purposes Firstly it is used in manufacturing to connect the programming station and program the S
11. 4 HS ATPWM2 CLKIN AIN4 PB4 PA5 ATPWM3 ICCDATA AIN5 PB5 PA6 MCO I LK 10 AIN6 PB6 E PA7 HSCO MPOUT Mode selection GND automatic 5 V manual R56 160 kQ R25 P JS ph7 1022 tka 330 pF ke Pal R30 A 330pF 562 4580 bm vi na SC 15V 48v C28 100 nF 50 v P12 10 R33 a 123456789101112 13 ra R55 5V 10 kQ STS4NF100 man R49 Ra R57 Tako Cool bagi 1 5 ka 160 kQ Bt 27 ko 1 8 ka R51 1 8 KQ Rp STPS1H100A 12 L C34 HB kO nF C33 A L4 100nF 50v 100 nF J50 v P14 10 R38 T4 STS4NF100 1N4148 1N4148 4148y D183 R58 R38 H 7 160 ka R37 pa 27 kQ 4 D20 gt 1N4148 D25 AM00902 20 25 Doc ID 17274 Rev 1 www BDTIC com ST UM0926 Bill of material 6 Bill of material Table 3 Bill of material STEVAL ILL019V1 1 Q Reference Part Type Manufacturer Ordering code 1 1 C1 220 nF 305 V AC X2 capacitor EP
12. 46 348 350 351 355 357 Viep V 12 1 15 17 9 20 8 23 7 26 7 29 7 32 7 35 6 38 7 Figure 11 Modified buck converter output current 450 400 350 Aa a a 300 aka 200 LEB 150 100 50 0 T T T T T T T T T 12 1 15 17 9 208 23 7 26 7 29 7 32 7 356 38 7 Ven V AM07315 Maximum load capability One of the most important features regarding this reference design is its maximum power capability because it limits the maximum number of LEDs connected to this board The power capability measurement for wide input voltage range is shown in Figure 12 The worst case for the measurement is the minimum input voltage and therefore the board was tested with the input voltage 88 V AC The maximum power is limited by the high PF flyback converter and so its power capability is measured separately resistive load is connected to the output of the high PF flyback converter capacitor C10 Figure 12 shows that the output voltage starts to decrease as soon as the load current reaches 0 7 A blue waveform As indicated by the red waveform the maximum output power is limited to 35 W The inverted buck converters are used as the second stage DC DC converter and it is possible to estimate their efficiency at 9096 also measured Therefore maximum power capability of the STEVAL ILLO19V1 for wide input voltage range is 32 W Also the Power MOSFET and transformer
13. 995 for the input voltage 110 V AC and 0 94 for the input voltage 230 V AC measured for 30 W load The total harmonic distortion THD measurement is demonstrated in Figure 9 THD is 8 5 for the input voltage 110 V AC and 14 1 for the input voltage 230 V AC measured for 30 W load The efficiency measurement for these two loads is shown in Figure 10 The efficiency is approximately 75 for a 30 W load which is in line with the estimation performance because there are two converters AC DC and DC DC used in the design Doc ID 17274 Rev 1 ky www BDTIC com ST UM0926 STEVAL ILL019V1 measurements a Figure 7 Power Factor measurement Power Factor 1 ky Hi 0 9 0 8 0 8 T 07 0 7 E pa baa 30 LEDs oe 05 20LEDs 9 0 4 0 4 E 0 3 0 3 0 2 0 2 0 1 0 1 0 r r r r r r r r r 0 90 110 130 150 170 190 210 230 250 265 Input voltage V AM07311 Figure 8 Power Factor zoom measurement Power Factor zoom 1 1 0 98 0 98 0 96 0 96 094 0 94 5 Ke SE 30 LEDs ma 09 20LEDs L 0 88 0 88 0 86 0 86 0 84 0 84 0 82 0 82 0 8 r 0 8 90 110 130 150 170 190 210 230 250 265 Input voltage V AM07312 Doc ID 17274 Rev 1 9 25 www BDTIC com ST STEVAL ILL019V1 measurements UM0926 3 2 10 25 Figure 9 Total Harmonic Distortion THD measurement
14. COS B32923C3224M 2 1 C2 150 nF 305 V AC X2 capacitor EPCOS B32922C3154M 3 1 C3 470 nF 305 V AC X2 capacitor EPCOS B32923C3474M 4 1 C4 2 2 nF 63V 0805 SMD capacitor 5 1 C5 220 nF 63 V 0805 SMD capacitor C6 C12 C13 C14 C15 C19 C20 C23 C24 C25 C28 C29 6 23 C30 C33 C34 100 nF 63 V 0805 SMD capacitor C35 C38 C39 C40 C41 C42 C43 C45 7 2 C7 C11 47 uF 35V Electrolytic capacitor 8 1 C8 330 pF 63 V 0805 SMD capacitor 9 2 C9 C10 1mF 63V Electrolytic capacitor EPCOS B41821F8108M 1206 ceramic 10 1 C16 2 2 UF 25 V capacitor X7R AVX 12063C225KAT2A 11 1 C17 4 7 UF 63V Electrolytic capacitor 12 1 lc 1nF 250VAC Y1 capacitor Gre EEN DE1E3KX102MA5B C21 C22 C26 13 8 C27 C31 C32 330 pF 63 V 0805 SMD capacitor C36 C37 14 1 C44 10nF 63V 0805 SMD capacitor 15 1 DB1 1A 250V Diode bridge SMD Transil n 16 1 D1 P6KE300A Ee STMicroelectronics P6KE300A unidirectional 300 V 17 1 D2 STTH1RO6U 1 7000 x STMicroelectronics STTH1RO6U ultrafast diode D3 D7 D8 D9 D11 D13 D15 18 15 D17 18 D19 1N4148 e ie d D20 D22 D23 D24 D25 19 1 D4 STTH3R02S SA 200 V STMicroelectronics STTH3R02S ultrafast diode 20 1 D5 STTH102A LA ran y STMicroelectronics STTH102A ultrafast diode ky Doc ID 17274 Rev 1 21 25 www BDTIC com ST Bill of material UM0926 Tab
15. KQ 0805 SMD resistor 22 25 Doc ID 17274 Rev 1 ky www BDTIC com ST UM0926 Bill of material Table 3 Bill of material STEVAL ILL019V1 continued IQ Reference Part Type Manufacturer Ordering code 47 R14 R15 1 39 1206 SMD resistor 48 1 R16 1 59 1206 SMD resistor 49 3 R17 R19 R54 4 7 KQ 0805 SMD resistor 50 1 R24 3 9 KQ 0805 SMD resistor 51 4 R25 R31 R37 2 7 KQ 0805 SMD resistor R43 52 4 R26 R32 R38 1 5 KQ 0805 SMD resistor R44 R29 R30 R35 53 8 R36 R41 R42 5 6 Q 1206 SMD resistor R47 R48 54 4 R49 M50 RST 1 8 KQ 0805 SMD resistor R52 55 1 R53 390 KQ 0805 SMD resistor 56 1 R55 10 KQ 0805 SMD resistor 57 4 R56 R57 R58 160 KQ 0805 SMD resistor R59 58 1 TRI ER30 core Specified in this Tpk document 59 1 T1 STP7NK80ZFP Power MOSFET STMicroelectronics STP7NK80ZFP 9A 800V 60 1 T1HEAT HEATSINK 61 4 T2 T3 T4 T5 STS4NF100 Power MOSFET STMicroelectronics STS4NF100 4A 100V ky Doc ID 17274 Rev 1 23 25 www BDTIC com ST References UM0926 7 24 25 References 1 STMicroelectronics Application note AN2838 35 W wide range high power factor flyback converter demonstration board using the L6562A see www st com 2 STMicroelectronics Application note AN2983 Constant current inverse buck LED driver using L6562A see www st com 3 STMicroelectronics Application note AN2928 Modif
16. LAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION OR INFRINGEMENT OF ANY PATENT COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE ST PRODUCTS ARE NOT RECOMMENDED AUTHORIZED OR WARRANTED FOR USE IN MILITARY AIR CRAFT SPACE LIFE SAVING OR LIFE SUSTAINING APPLICATIONS NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY DEATH OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ST PRODUCTS WHICH ARE NOT SPECIFIED AS AUTOMOTIVE GRADE MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER S OWN RISK Resale of ST products with provisions different from the statements and or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever any liability of ST ST and the ST logo are trademarks or registered trademarks of ST in various countries Information in this document supersedes and replaces all information previously supplied The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners 2010 STMicroelectronics All rights reserved STMicroelectronics group of c
17. T7 microcontroller Secondly it connects up to four potentiometers to set the brightness of each LED string For the RGGB LED module only three potentiometers are used because two green LED strings are driven with the same brightness The last feature on the connector is a Mode selection Pin 9 which is used to choose either automatic or manual mode During automatic mode pin 9 is internally grounded A positive voltage of 5 V must be connected to pin 9 for example to use the switch S for the manual mode The automatic mode does not require any action from the user and changes the colors through the color spectrum The manual mode keeps the color stable based on the position of the potentiometers The last step is to resupply the board with the proper input voltage The output light color can be manually tuned as demonstrated in Figure 4 The external control circuitry is again used just for demonstration purposes and is not available for ordering Figure 3 J3 connector with manual control circuitry Figure4 Different color settings using manual color control Doc ID 17274 Rev 1 ky www BDTIC com ST UM0926 Design concept 2 Design concept Figure 5 shows the STEVAL ILLO19V1 block diagram Basically the board consists of two converters The first one is in fact an AC DC converter designed as an isolated high PF flyback converter using the L6562A controller with the STP7NK80ZFP Power MOSFET as a
18. ding positiononthetransformer 18 High PF flyback converter 19 Four modified buck converters and microcontroller 20 Doc ID 17274 Rev 1 ky www BDTIC com ST UM0926 Getting started with the STEVAL ILL019V1 1 1 Getting started with the STEVAL ILL019V1 This section allows designers to quickly evaluate the board as the load and external potentiometer connections to manually control the color of the light are described As already stated the light color can be changed automatically or manually The application is set by default to automatic mode in case no potentiometer nor jumper is connected to the board via the J3 connector see Figure 1 In order to control each LED channel manually the potentiometers and jumper must be connected to the J3 connector These two modes are demonstrated in the following sections Automatic color change mode First the RGGB LEDs must be connected to the board via the output connector J6 see Figure 1 Four independent channels marked as CH1 CH2 CH3 and CH4 allow controlling four independent LED strings The LED anode must be connected to the plus pin and the LED cathode must be connected to the minus pin which is marked close to the connector J6 The recommended minimum LED voltage for each channel is 15 V and the maximum voltage is 40 V in order to keep the LED current within 5 As the typical LED forward
19. ied buck converter for LED applications see www st com Revision history Table 4 Document revision history Date Revision Changes 25 Oct 2010 1 Initial release Doc ID 17274 Rev 1 ky www BDTIC com ST UM0926 Please Read Carefully Information in this document is provided solely in connection with ST products STMicroelectronics NV and its subsidiaries ST reserve the right to make changes corrections modifications or improvements to this document and the products and services described herein at any time without notice All ST products are sold pursuant to ST s terms and conditions of sale Purchasers are solely responsible for the choice selection and use of the ST products and services described herein and ST assumes no liability whatsoever relating to the choice selection or use of the ST products and services described herein No license express or implied by estoppel or otherwise to any intellectual property rights is granted under this document If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein UNLESS OTHERWISE SET FORTH IN ST S TERMS AND CONDITIONS OF SALE ST DISC
20. le 3 Bill of material STEVAL ILL019V1 continued 1 Q Reference Part Type Manufacturer Ordering code 15 V Zener diode 21 1 D6 BZV55C15 SOD80 22 4 P10 D12 D14 sTps1H100A 1 A 100 V Schottky eTMicroelectronics STPS1H100A D16 diode 30 V Zener diode 23 1 D21 BZV55C30 SOD80 24 1 F1 2 5 A 250V Fuse 25 1 F1 Fuse socket H1 H2 H3 H4 26 5 TIHEAT Screw Screw 3 x 6 mm 27 4 eh Column distance 15 mm H44 28 5 WA Na IC6 L6562AD PFC controller STMicroelectronics L6562AD 29 1 ic2 TL431AID Programmani STMicroelectronics TL431AID voltage reference 30 1 lic3 L78M15ACDT Linear voltage STMicroelectronics L78M15ACDT regulator 31 1 lic4 L78L05ACD13TR Linear voltage STMicroelectronics L78LO5ACD13TR regulator 32 1 IC9 ST7FLIT15BF1M6 Microcontroller STMicroelectronics ST7FLIT15BF1M6 33 1 J1 ARK120 2 Input connector 34 2 J3 J6 S1G40 Control connector 40 pin Frame core chokes 35 1 L1 B82732F2451B001 2x100 mH 0 45 A EPCOS B82732F2451B001 36 4 L2 L3 L4 L5 MSS1260 105KLD 1MH 0 4A Coilcraft MSS1260 105KLD 37 1 Ol1 PC817B Optocoupler 38 2 R1 R2 1 5 MQ 1206 SMD resistor 39 2 R3 RE 22 KQ 0805 SMD resistor 40 1 R4 9 1 KQ 0805 SMD resistor 41 2 R5 R22 39 KQ 0805 SMD resistor 42 3 R7 R20 R21 2 2 KQ 0805 SMD resistor 43 2 R8 R9 220 KQ 1206 SMD resistor R10 R13 R27 p 44 6 R33 R39 R45 10Q 0805 SMD resistor 45 2 R11 R23 47 KQ 0805 SMD resistor R12 R18 R28 F 46 6 R34 R40 R46 1
21. ne input voltage range 88 V to 265 V AC Load 5 to 13 LEDs per each channel 32 W maximum RGGB LED power wide input voltage range 42 W maximum RGGB LED power EU input voltage range Isolated SMPS Individual regulation of RGGB brightness EN55015 and EN61000 3 2 compliant Double sided PCB 145 mm x 75 mm x 27 mm Figure 1 STEVAL ILLO19V1 demonstration board October 2010 Doc ID 17274 Rev 1 1 25 www st com www BDTIC com ST Contents UM0926 Contents 1 Getting started with the STEVAL ILLO19V1 5 1 1 Automatic color change mode 5 1 2 Manual color change mode 6 2 DESIGN concept 9 mmm a am at tt n da a a a a a da n t 7 3 STEVAL ILLO19V1 measurements 8 3 1 PF THD efficiency 8 3 2 Output current for different number of LEDS 10 3 3 Maximum load capability 11 3 4 DIMMING 2 e re oa e cat a a a ac ale a mm Bau Arata ele ed A 13 3 5 Input and output electrical waveforms 13 3 6 Thermal measurement 14 3 7 Standard EN61000 3 2 measurement 15 3 8 EMI measurement EN55015 16 4 Power transformer specifications 17 5 Schematic diagrams
22. ompanies Australia Belgium Brazil Canada China Czech Republic Finland France Germany Hong Kong India Israel Italy Japan Malaysia Malta Morocco Philippines Singapore Spain Sweden Switzerland United Kingdom United States of America www st com ky Doc ID 17274 Rev 1 25 25 www BDTIC com ST
23. or this measurement In this case the STEVAL ILLO19V1 has PF 0 94 and THD 14 1 ky Doc ID 17274 Rev 1 13 25 www BDTIC com ST STEVAL ILL019V1 measurements UM0926 Figure 18 LED current measurement 9 BLUE LEDs used as load LBW5SN d H f LED output current J F L t HI f J T t J TI H F 5 ps 58 mA meant 349 99 mA Freg NN 189 326 kHz pkpk 2 57 8 mA Figure 19 Input voltage and current Figure 20 Input voltage and current waveforms for Vin 110 V AC waveforms for Vum 230 V AC Input voltage and current waveforms Input voltage and current waveforms Input voltage Input voltage Vin 110V AC Vin 230V AC f Input current H Input current y B E i d 5m 0 59R 1 5m50V STOPPED J Sms 200 mA 5 ns 100V STOPPED 3 6 Thermal measurement Thanks to the thermal chamber and camera the overall temperature for all the components assembled on the STEVAL ILLO19V1 is easily detected Figure 21 shows the thermal behavior for ambient temperature 25 C input voltage 230 V AC and 30 W RGGB LED load The maximum temperature is 76 1 C and it is measured on the sense resistors R35 R36 R41 and R42 on the Power MOSFET T3 and T4 and also on the linear voltage regulator
24. re 26 Transformer frame dimensions Po 12 70X14 EL e ee H E a a A aa tbe fester Ze dees H HHH LAV AAA el le lo lo l l lol la lelle Electrical specifications for the transformer e Converter topology flyback TM mode e Ferrite material PC40 or similar for SMPS e Min operating frequency 36 kHz e Inductance factor approximately Al 90 nH air gap in central leg e Primary inductance 1 61 mH e Primary winding N1 N2 134 turns ky Doc ID 17274 Rev 1 17 25 www BDTIC com ST Power transformer specifications UM0926 Table 2 Transformer design specifications Winding Layer Start pin Finish pin Tune Wire diameter Side sequence number number mm N1 5 3 1 67 0 4 Primary N2 2 5 3 67 0 4 Primary N3 1 8 7 13 0 2 Primary N4 3 17 18 14 15 33 270 4 Secondary N5 4 11 12 17 0 2 Secondary N6 9 over core 8 8 1 Cu foil Shielding Note Intersperse winding N3 N5 through as much of the winding area as possible in order to reduce the leakage inductance since these windings do not completely fill a layer the winding should be spaced evenly across the layers Each layer of windings N1 and N2 must be isolated by a single layer of Mylar Tape Figure 27 Transformer winding description 1 TR117 18 ea D N4 N2 14 15 Primary side 3 Secondary side 11 8 Je 7 12 AM07310 Figure 28 Winding position on the transformer 3 4 mm 3 4 mm to satisfy safety dis
25. switch The input voltage for this convertor can be between 88 V and 265 V AC and the converter delivers up to 35 W for this wide input voltage range The output voltage is set to 48 V The high Power Factor flyback convertor was already designed separately for demonstration purposes ordering code is EVL6562A 35WFLB and therefore all design equations and calculations are described in AN2838 see Section 7 References The second converter is in fact a constant current LED driver It is a modified buck converter designed as the constant current source recommended for proper LED driving using the L6562A and STS4NF100 Power MOSFETs Four independent DC DC converters are assembled on the board in order to drive independent RGGB LED strings The demonstration board for a modified buck converter was also developed ordering code is EVL6562A LED and this design concept is described in AN2983 see Section 7 References All design equations for the modified buck converter are shown in AN2928 see Section 7 References The color control and brightness regulation is provided by the PWM generator which has four independent channels Each PWM signal is connected to one modified buck converter in order to set the required brightness level for each LED string The PWM signal can be set between 0 and 100 no brightness or maximum brightness The ST7FLIT15BF1M6 microcontroller assembled on the board provides the right PWM signals Thanks to the microcontroller
26. tance reinforced isolation reinforced isolation Coil former gt ESS d 18 25 Doc ID 17274 Rev 1 ky www BDTIC com ST Schematic diagrams UM0926 Schematic diagrams 5 High PF flyback converter Figure 29 LOGOONV SVLVNE dn LY AP ce Hulo sed 9AL d4Z08NZd Lossazalt L L g 89d EL O 100Y901821 AS vol O LQOVSIN8Z1 ASL LEIA 9 Ka ogossazgBu iA 9 2u ze ad osel DAL T80 shari L DA Lb LO Qve9s91 rm 068 OY 06S 64 OY Odd 8H VA zz PI du aa NOZS JU 0Zy cu 7 all V SP 0 HW 00 1X GINs000 k90s2d L F UNAN T Ae 29 Ju 027 Si ji L u 0S ga 3 leanne 2s E Wt a TAH N87 SZOHEHLLS T HA Jul DN 19 25 Doc ID 17274 Rev 1 www BDTIC com ST Schematic diagrams UM0926 Figure 30 Four modified buck converters and microcontroller 15V 48V STPS1H100 A R23 nF C23 4 EH 100 nF so v 210 2100 nF 50V GREEN STS4NF100 IC9 i ST7FLIT15BF1F1M6 OSC1 PCO CLKIN OSC2 PC1 Reset PAO HS LTIC SS AINO PBO PA1 HS ATIC SCK AIN1 PB1 PA2 HS ATPWMO MISO AIN2 PB2 PA3 HS ATPWM1 MOSI AIN3 PB3 PA
27. uasi peak measurement for frequency range from 9 KHz to 30 MHz and the real measurement is demonstrated in Figure 24 The test was performed with input voltage Vp 230 V AC 30 W RGGB LED load and the LED brightness was set to maximum level The limits of the mains terminal disturbance voltages for average measurement for frequency range from 150 KHz to 30 MHz and the real measurement is shown in Figure 25 These results comply with the standard EN55015 as shown in Figure 24 and Figure 25 Figure 24 Quasi peak measurement Figure 25 Average measurement from 9 KHz to 30 MHz from 150 KHz to 30 MHz Ref 100 dBuV Atten 10 dB Ref 70 dBpV Atten 18 dB EtniQP AB DC Coupled dB DC Coupled ee HE nA WL 2 Vr HI 52 s3 FS 83 FS AA i AR Start Skz o Stop 29 MHz Start 150 kHz Stop 39 MHz Res BH 9 kHz VBH 30 kHz Sweep 4 ks 2121 pts Res BH 9 kHz VE 3A kHz Sweep 4 ks 2115 pts 16 25 Doc ID 17274 Rev 1 ky www BDTIC com ST UM0926 Power transformer specifications 4 Power transformer specifications Transformer type e Winding type layer e Core type ER30 e Coil former horizontal type 9 9 pins see dimensions in Figure 26 e Mains insulation 4 KV Figu
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