UM1512 User manual - STMicroelectronics
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1. UM1512 yf i life augmented User man ual STEVAL ILDO03V1 SCR dimmer EU version Introduction The purpose of this board is to allow the user to evaluate the STEVAL ILDO03V1 SCR silicon controlled rectifier dimmer solution to dim low consumption lamps particularly CFL and LED lamps without flickering phenomenon This light dimmer allows the user to evaluate the SCR dimmer concept by directly testing 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 modifications if needed to fit particular application requirements STEVAL ILDO03V1 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 and potentiometer for its control circuit February 2013 Doc ID 022738 Rev 2 1 15 www st com Contents UM1512 Contents 1 Operating conditions ss ER EER E BR ERA ER EE EE EE N RR RR RR ed N 4 1 1 Basic features EE SE GE GE GE eee 4 1 2 Safety instruction ccc cc MEE ER ER ERERR ER EER BERE besa oe nak on RR RS 4 2 Getting started ses ss SE ce deWseek bee HEERS ED bes Henne ened 6 2 1 Connection diagram ass BR RR ek ec a a eae ke ee ee ee 6 2 2 Schematic and board layout sk an ESE aaau 6 3 Experimental tests a2. 5 A fuse is required to avoid SCR failure e LC noise filter 2 4 mH 100 nF to pass the EN55015 standard with a 350 W 230 V halogen lamp e Power efficiency 350 W 230 V gt 99 e Standby losses 230 V lt 0 5 W could be reduced to 0 if potentiometer features a mechanical switch to open the circuit at minimum setting 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 familiar with the installation use and maintenance of power electrical systems Doc ID 022738 Rev 2 hy UM1512 Operating conditions Intended use The SCR dimmer demonstration board is designed for demonstration purposes only and should not be used for domestic installation or for industrial installation ky Doc ID 022738 Rev 2 5 15 Getting started UM1512 2 2 1 2 2 6 15 Getting started Connection diagram Figure 1 shows how to connect the STEVAL ILDOO3V1 to the lamp to be dimmed Please unplug the circuit from the line before setting the different connections Figure 1 Connection diagram fuse 7 2 o 7 N o gt Mains voltage VAC2 VACI WARNING gt DEMO BOARD FOR EVALUATION STEVAL ILDOOSVI PURPOSE B ONLY Potentiometer AM11048v1 Schematic and board layout Figure 2 shows the ST
3. 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 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 ky Doc ID 022738 Rev 2 15 15
4. Figure 10 average and duasi peak measurements are lower than the standard limits so the SCR dimmer successfully passes the EN55015 standard Doc ID 022738 Rev 2 UM1512 Conclusion 4 Conclusion The STEVAL ILDOO3V1 SCR dimmer is able to successfully drive halogen lamp CFL and LED dimmable lamps Thanks its DC gate current control the STEVAL ILD003V1 has no minimum power limitation The minimum lamp power is set at 3 W which seems 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 1EC61000 4 4 fulfillment with a withstanding higher than 2 kV e EN55015 conducted noise Doc ID 022738 Rev 2 11 15 Assembly information UM1512 Appendix A Assembly information A 1 A 2 12 15 Component assembly layout Figure 11 Silkscreen bottom left AM11058v1 Figure 12 Silkscreen top right 80 e B o ta F to os r AM11059v1 Bill of materials Table 2 BOM Reference Part C1 C3 1 uF 25V C5 100 nF X2 400 V C7 C8 10 nF 25 V D2 D4 BZX84C15 D3 D5 1N4148 F1 FUSE 2 5 A Vc1 Vac1 Gx1 Vac2 Gx2 Vc3 TP J1 CON2 Doc ID 022738 Rev 2 ky
5. 1000 4 4 standard with the following conditions e 230 V RMS 50 Hz mains voltage e L C filter 2 4 mH 100 nF e 40 W 230 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 dimmer is able to withstand a minimum withstanding of 2 kV before the one SCR turns on refer to Table 1 Table 1 Fast transient immunity test results at 5 kHz Coupling mode Immunity level at 5 kHz L PE 2 kV L PE 2kV N PE 2kV N PE 2 kV Doc ID 022738 Rev 2 Experimental tests and results UM1512 3 3 2 10 15 Radio disturbance compliance according to EN 55015 Radio disturbance has been checked according to the EN 55015 standard in the following conditions 230 V RMS 50 Hz mains voltage L C filter 2 4 mH 100 nF 350 W 230 V incandescent lamp load The potentiometer is set at different angles Figure 10 gives the measurement of the maximum conducted noise which is reached for a 50 output power ton Figure 10 SCR dimmer radio disturbance compliance QuasiPeak limit Average limit il i Leet ft En5501S quaripeak Lint H2 ErSS01Savecage Detector Avg Peak 4 QuasiPeak measurement Average measurement AM11064v1 According to
6. EVAL ILDOO3V1 schematic and highlights the different blocks of the control circuit Figure 3 shows the board copper tracks layer bottom view Capacitors C1 and C3 are 1 uF these two capacitors are used to have a constant current through the gate of each SCR This high capacitor value compared to a standard value of 100 nf in Triac Diac light dimmers imposes more current to charge it This average current passes through the potentiometer Rp so the maximum power dissipated through the potentiometer is about 0 4 W The potentiometer Rp should be 0 5 W minimum Doc ID 022738 Rev 2 hy UM1512 Getting started Figure 2 SCR dimmer schematic ii Latched device to I apply permanent R31 AM12467v1 AM11050v1 4 Doc ID 022738 Rev 2 7 15 Experimental tests and results UM1512 3 Experimental tests and results 3 1 STEVAL ILD003V1 SCR dimmer operation with 40 W incandescent lamp Figure 4 5 6 and 7 show the good SCR dimmer operation for a 230 V 15 W incandescent lamp for a turn on delay of 5 ms and 0 5ms refer to toy in the figures Figure 2 shows the measurement location of the voltages and the currents Refer to Figure 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 Ch 100V Ch2 S0 0mA Q M 4 0ms 125kS s 8 Opsipt A Ch2 18 0mA Figure 6 Capacitor discharge voltag
7. SCR dimmer operation for 7 ms turn on delay with LED lamp n saasaa auaa aaan 9 SCR dimmer radio disturbance compliance 0000 02 EE EE ee ee ee 10 Silkscreen bottom left 0 0 0 6 cn eee eens 12 Silkscreen top right EE ER EE RE EE Re et tenes 12 Doc ID 022738 Rev 2 3 15 Operating conditions UM1512 Note 1 1 Note 1 2 4 15 Operating conditions The STEVAL ILD003V1 operating conditions are e Line RMS voltage and frequency 198 264 V 50 Hz e Ambient temperature range 0 to 60 C e Dimmable power range with halogen CFL and LED lamps without heatsinks mounted on SCRs 3 to 350 W for 230 V rms line A higher load power may be reached with a different filter inductor and a bigger SCR heatsink refer to AN533 Basic features The board circuit features e Two TS820 600FP SCRs in reverse parallel connection e A single potentiometer to set the turn on delay of both SCRs Maximum power turn on delay 0 8 ms Minimum power turn on delay 7 7 ms When dimming power is at minimum setting the lamp may show low residual brightness This is due to the reduced maximum turn on angle chosen for proper operation with LED or CFL lamps This phenomenon may be suppressed if a longer maximum turn on angle is set or if a potentiometer with an integrated switch to open the circuit in OFF position is used e Fuse to protect the SCR in case of lamp flash over or accidental short circuit 2
8. e after turn on chi 100V Ch2 SOOMA Q M 4 Orns 125kS s 8 Opsit A Cn2 18 0mA Figure 7 SCR continuous gate current Ad Ch1 T00V Ch2 SOOMAA Q M 2 Oms 2 SMS s 400nsipt Ch3 S OV A Ch2 18 0mA ls 100uA div Chi 100V Ch2 SOOmA Q M 2 Oms 2 5MS s 400nsipt A Ch2 18 0mA SCR gate current must be higher than 100 pA to keep the SCR ON whatever the Anode current is 8 15 Doc ID 022738 Rev 2 UM1512 Experimental tests and results 3 2 STEVAL ILD003V1 SCR dimmer working with LED lamp Figure 8 and 9 show a 6 W LED lamp operation with the SCR dimmer at different turn on delays Dimmable CFL and LED lamps function well with the SCR dimmer without flickering Figure 8 SCR dimmer operation for 3 ms turn on delay with LED lamp Figure 9 SCR dimmer operation for 7 ms turn on delay with LED lamp v X 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 to 20 us ripple on the turn on delay due to the dimmer analog control accuracy may lead to a different brightness order set by the ballast This is the case for some lamp brands if the ballast has no feature embedded to filter the turn on delay information 3 3 Electromagnetic compatibility test 3 3 1 Fast transient voltage immunity Immunity against transient voltage has been tested according to the IEC6
9. nd results 0c cee eee EE ER Re ee Re 8 3 1 STEVAL ILD003V1 SCR dimmer operation with 40 W incandescent lamp 8 3 2 STEVAL ILDOO3V1 SCR dimmer working with LED lamp 9 3 3 Electromagnetic compatibility test EE EE Ee eee 9 3 3 1 Fast transient voltage immunity is se is se Se ee ee eee 9 3 3 2 Radio disturbance compliance according to EN 55015 10 4 CONCIUSION ss EER BREER EER RES ARE BERE SES SEE DER teehee ee ees 11 Appendix A Assembly information ses s ss ER RE RR eee RR RR RE 12 A 1 Component assembly layout RR EE EE EE RR ee 12 A 2 Bill of materials EE EE 0c ee ee ee 12 REVISION hiStory ui sade ee MED WE EE RE EER RE OAAR SE BEER EE RE ew N 14 2 15 Doc ID 022738 Rev 2 ky UM1512 List of figures 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 Connection diagram OE end dak EE ees ee daa ade eae lad veda baa eee 6 SCR dimmer schematic EE EE EG eee 7 SCR dimmer PCB layout 1 0 0 0 EE ridete eee ee 7 SCR dimmer operation for 5 ms turn on delay 00 00 EE Ee eee 8 SCR dimmer operation for 0 5 ms turn on delay 0 00 eee ee eee 8 Capacitor discharge voltage after turn on 1 2 sasaaa aaau 8 SCR continuous gate current 0 0 00 ee eae 8 SCR dimmer operation for 3 ms turn on delay with LED lamp 200 9
10. rs 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 DISCLAIMS 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 ST PRODUCTS ARE NOT AUTHORIZED FOR USE IN WEAPONS NOR ARE ST PRODUCTS DESIGNED OR AUTHORIZED FOR USE IN A SAFETY CRITICAL APPLICATIONS SUCH AS LIFE SUPPORTING ACTIVE IMPLANTED DEVICES OR SYSTEMS WITH PRODUCT FUNCTIONAL SAFETY REQUIREMENTS B AERONAUTIC APPLICATIONS C AUTOMOTIVE APPLICATIONS OR ENVIRONMENTS AND OR D AEROSPACE 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
11. y UM1512 Assembly information X Table 2 BOM continued Reference Part L1 2 4 mH 500 W Q1 Q3 2N2222 Q2 Q4 2N2907 RP 220 kQ 1W R4 R5 R7 R8 10 KQ 0 125 W R6 R9 50 KQ 0 25 W R11 R12 20 KQ 0 125 W R30 1kQ 0 25 W R31 360 KQ 0 25 W X1 X2 TS820 600FP Doc ID 022738 Rev 2 13 15 Revision history UM1512 Revision history 14 15 Table 3 Document revision history Date Revision Changes 02 Jul 2012 1 Initial release 26 Feb 2013 2 Adding power efficiency standby losses and minimum power to be dimmed Doc ID 022738 Rev 2 UM1512 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 refe
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