STEVAL-ILD003V2: SCR dimmer, US version
Contents
1. lt T UM1513 WZ life augmented User manual STEVAL ILDOO3V2 SCR dimmer US version Introduction The purpose of this board is to allow the user to evaluate the STEVAL ILDOO3V2 SCR dimmer solution for low consumption lamps particularly CFL and LED lamps without flickering phenomenon This light dimmer is a development tool that allows the user to test directly most of the dimmable loads on the market today Through hole technology is used for the most important components such as the LC filter gate resistor turn on delay capacitor etc in order to allow board modification if needed STEVAL ILDOO3V2 light dimmers based on SCR allow flickering phenomenon to be solved thanks to the continuous current applied through the gate The SCR dimmer may easily replace a standard low cost analog Triac light dimmer using a Diac control circuit February 2013 Doc ID 022739 Rev 2 1 14 www st com Contents UM1513 Contents 1 Operating conditions 222x266 rLrLbarkseeeceecuieader uns sm pues 4 1 1 Basic featureS anaana aaa a 4 1 2 Safety instruction naaa aaa aaea rss 4 2 AR 5 2 1 Connection diagram llle 5 2 2 Schematic and board layout o oooo ooocononoooono no 6 3 Experimental tests and results 7 3 1 STEVAL ILDOO3V2 SCR dimmer operation with 20 W incandescent lamp 7 3 2 STEVAL ILDOOS3V2 SCR dimmer working with LED lamp 8 3 3 Electromagnetic compati2. Doc ID 022739 Rev 2 Ly
3. to be the lowest dimmable lamp power today on the market The only flickering that may occur is a low frequency lamp brightness variation if the lamp internal ballast doesn t feature any filtering on dimming angle detection The circuit presented on this board also fulfills the standard requirements for the EMC European directive e I EC61000 4 A fulfillment with a withstanding higher than 5 kV 10 14 Doc ID 022739 Rev 2 Ly UM1513 Assembly information AppendixA Assembly information A 1 Component assembly layout Figure 13 Silkscreen bottom left AM11065v1 AM11066v1 A 2 Bill of materials Table 2 BOM Reference Part Ly Doc ID 022739 Rev 2 11 14 Assembly information UM1513 Table 2 BOM continued a e 2 12 14 Doc ID 022739 Rev 2 UM1513 Revision history Revision history Table 3 Document revision history ome evon er 26 Jun 2012 Initial release 26 Feb 2013 Pani d efficiency standby losses and minimum power to be 9 Doc ID 022739 Rev 2 13 14 UM1513 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 Purcha
4. 0 0 0 cn eee eens 11 Figure 14 Silkscreen top right nananana anaa aana ee eee eens 11 Ly Doc ID 022739 Rev 2 3 14 Operating conditions UM1513 1 Operating conditions The STEVAL ILDOO3V2 operating conditions are Line RMS voltage and frequency 98 132 V 60 Hz Maximum operating ambient temperature 60 C Dimmable power range with halogen CFL and LED lamps with 27 C W heatsinks mounted on SCRs 3to 350 W for 110 120 V rms line Note Higher power may be reached with a different filter inductor and bigger SCR heatsink 200 W is the maximum allowed power without any SCR heatsink 1 1 Basic features The board circuit features Two TS820 600FP SCRs in reverse parallel connection A single potentiometer to set the turn on delay of both SCRs Maximum power turn on delay 0 7 ms Minimum power turn on delay 8 4 ms Fuse to protect the SCR in case of lamp flash over or accidental short circuit 5 A fuse is required with t lt 24 5 A s LC noise filter 29 uH 100 nF Power efficiency 350 W 120 V gt 98 5 Standby losses 120 V lt 0 3 W could be reduced to 0 if potentiometer features a mechanical switch to open the circuit at minimum setting 1 2 Safety instruction Warning The high voltage levels used to operate the SCR dimmer demonstration board may present a serious electrical shock hazard This demonstration board must be used in a suitable laboratory by qualified personnel only fam
5. ROSPACE APPLICATIONS OR ENVIRONMENTS WHERE ST PRODUCTS ARE NOT DESIGNED FOR SUCH USE THE PURCHASER SHALL USE PRODUCTS AT PURCHASER S SOLE RISK EVEN IF ST HAS BEEN INFORMED IN WRITING OF SUCH USAGE UNLESS A PRODUCT IS EXPRESSLY DESIGNATED BY ST AS BEING INTENDED FOR AUTOMOTIVE AUTOMOTIVE SAFETY OR MEDICAL INDUSTRY DOMAINS ACCORDING TO ST PRODUCT DESIGN SPECIFICATIONS PRODUCTS FORMALLY ESCC QML OR JAN QUALIFIED ARE DEEMED SUITABLE FOR USE IN AEROSPACE BY THE CORRESPONDING GOVERNMENTAL AGENCY 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 O 2013 STMicroelectronics All rights reserved STMicroelectronics group of companies 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 14 14
6. bility test o o oooooooooo 9 4 Conclusion leeren hh 10 Appendix A Assembly information leeren 11 A 1 Component assembly layOUt o o ooooooooenon nooo 11 A 2 Bilofmaterials nannaa naaa 11 Revision history get euius du erario ten ee 866400 era dd cee 13 2 14 Doc ID 022739 Rev 2 Ly UM1513 List of figures List of figures Figure 1 Connection diaga ss mood rca an ra rada 5 Figure 2 SCR dimmer SCNOMAIIC i e sess s rs tee as cb de ek exo we ei lr PUR ec 6 Figure 3 SCR dimmer POB IByVoll compis dogm aa o a m Uk OR edn ER EORR e o 6 Figure 4 SCR dimmer operation for 5 ms turn on delay o ooo ooooooone ee 7 Figure 5 SCR dimmer operation for 0 5 ms turn on delay o ooooooocoooon oo 7 Figure 6 Capacitor discharge voltage after turn On 1 aa aaaea a ooo 7 Figure 7 SCRcontinuous gate current ana aaan aaa eee eee 7 Figure 8 Example of dimmable LED and CFLlamps 0 0000 cece ee ees 8 Figure 9 SCR dimmer operation for 5 ms turn on delay with LED laMp 8 Figure 10 SCR dimmer operation for 7 5 ms turn on delay with LED lamp 8 Figure 11 SCR dimmer operation for 5 ms turn on delay with CFLlaMp 9 Figure 12 SCR dimmer operation for 6 5 ms turn on delay with CFL lamp 9 Figure 13 Silkscreen bottom left 2
7. e 2 for Vax la Vc and Ig definitions Figure 4 SCR dimmer operation for 5 ms turn Figure 5 SCR dimmer operation for 0 5 ms turn on delay on delay M 2 0ms 2 5MS s 400ns pt e 50 0V 2 IOMA Q M 2 0ms 2 SMS s 400nsipt z ely An DA Y A Ch2 z 86 0mA Figure 6 Capacitor discharge voltage after turn M ike ls 100pA div M 2 0rns 2 5MS s 400nsApt l Ch 50 0Y Ch2 100mA Q M 2 0rs 2 5MS s 400ns pt A Ch2 86 0m4 A Ch2 z 86 0m4A Ch1 50 0Y Ch3 5 0V SCR gate current must be higher than 100 yA to keep the SCR ON whatever the Anode current Ly Doc ID 022739 Rev 2 7 14 Experimental tests and results UM1513 3 2 STEVAL ILD003V2 SCR dimmer working with LED lamp Figure 8 shows an image of a 120 V 8 W dimmable LED lamp and a 120 V 14 W CFL lamp Figure 9 10 11 and 12 show LED and CFL lamp operation at different turn on delays Figure 8 Example of dimmable LED and CFL lamps AM11063v1 Figure 9 SCR dimmer operation for 5 ms turn Figure 10 SCR dimmer operation for 7 5 ms on delay with LED lamp turn on delay with LED lamp i i Chi 50 0V Ch2 100m Q M 2 Orns 2 5MS s 400nsipt M 2 0ms 2 5MS s 400nsipt A A Ch z 86 0mA Ch2 86 0mA 8 14 Doc ID 022739 Rev 2 Ly UM1513 Experimental tests and results Figure 11 SCR dimmer operation for 5 ms turn Figure 12 SCR dimmer operation for 6 5 ms on delay with CFL lamp turn on delay with CFL lamp I Ch1 50 0V Ch2 104 Q2 M 2 0
8. iliar with the installation use and maintenance of power electrical systems Intended use The SCR dimmer demonstration board is designed for demonstration purposes only and should not be used for domestic installation or industrial installation 4 14 Doc ID 022739 Rev 2 Ly UM1513 2 2 1 Getting started Getting started Connection diagram Figure 1 shows how to connect the STEVAL ILDOOS3V2 to the lamp to be dimmed Please remove line voltage before setting the different connections Figure 1 Connection diagram Fuse Lamp Qi eS Mains voltage WARNING VAC2 var gt DEMO BOAF 0 FOR EVALUAT ION Q PURPOSE Y 7 ONL Y re Potentiometer AM11060v1 Doc ID 022739 Rev 2 5 14 Getting started UM1513 2 2 Schematic and board layout Figure 2 shows the STEVAL ILDOO3V2 schematic and highlights the different blocks of the control circuit Figure 3 shows the copper tracks layer bottom view Figure 2 SCR dimmer schematic Latched device to apply permanent AM12467v1 AM11062v1 6 14 Doc ID 022739 Rev 2 Ly UM1513 Experimental tests and results 3 Experimental tests and results 3 1 STEVAL ILD003V2 SCR dimmer operation with 20 W incandescent lamp Figure 4 5 6 and 7 show the good SCR dimmer operation for a 120 V 20 W incandescent lamp respectively for 5 ms and 0 5 ms refer to ton in the figures SCR dimming is OK and no light flickering occurs Refer to Figur
9. ms 2 5MS s 400nspt Ch1 50 0V Ch2 104 2 M 2 0ms 2 5MS s 400nsipt A Ch2 80 0mA Ch2 m A Ch 800 Dimmable CFL and LED lamps function well with the SCR dimmer without flickering Note that for low conduction angles some low light variation may occur with some CFL and LED lamps This variation is due to the lamp ballast behavior Indeed a 5 20 ys ripple on the turn on delay due to the dimmer analog control may lead to a different brightness order set by the ballast if no feature is embedded to filter the turn on delay information 3 3 Electromagnetic compatibility test Immunity against transient voltage has been tested according to the IEC61000 4 4 standard with the following conditions e 120 V 60 Hz mains voltage e L C filter 29 pH 100 nF e 150 W 120 V incandescent lamp load e Test procedure potentiometer is set to the minimum lamp brightness and a step by step increase in the burst voltage level until it reaches at least one spurious half cycle conduction of the SCR The result gives a minimum withstanding of 5 kV Table 1 Immunity against transient voltage Coupling mode L PE L PE N PE N PE Doc ID 022739 Rev 2 9 14 Conclusion UM1513 4 Conclusion The STEVAL ILDOO3V2 SCR dimmer is able to successfully drive halogen CFL and LED dimmable lamps from 3 W to 350 W Thanks its DC gate current control the STEVAL ILDOO3V2 has no minimum power limitation The minimum lamp power is set at 3 W which seems
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