35 W dimmable single string LED driver using HVLED001A and STF10LN80K5. Description

Transcription

1 STEVAL-ILL070V W dimmable single string LED driver using HVLED00A and STF0LN80K Data brief Features Input voltage: VIN = 90-0 Vrms, f: - Hz Output current: 700 ma (VLED = V to 8 V) Dimming: 00% to 0% Dimming interfaces: 0-0 V and PWM input High power factor, low THD Efficiency: > full load Open load voltage limiting (. V) Optional remote turn-off input Optional. V 0. A voltage regulator Fast discharge RoHS compliant Description The STEVAL-ILL070V is intended to drive one LED string with a maximum output current of 700 ma. The LED current can be finely adjusted using either a 0-0 V interface or a PWM signal (for example, provided by a microcontroller) on the SELV portion of the board. The universal input capability makes this board suitable in worldwide designs. On the secondary side, the board includes a connector to plug an auxiliary linear on the switching voltage regulator side to supply small circuits (e.g., IoT wireless expansions like BLE, Spirit or WiFi modules). The schematic for a simple linear regulator to supply V or. V is also provided. A very high power factor and efficiency are obtained even at light loads. Input voltage variations, excessive input voltage (overvoltage like surges or bursts) and very low input voltages are managed by the HVLED00A protections, improving the reliability of the application. The output capacitor is automatically discharged at turn-off to prevent any harm from contact with output connector. Output open circuit and overload protections include auto restart for safe operation in lighting environments. October 07 DocID0099 Rev /7 For further information contact your local STMicroelectronics sales office

2 Board description STEVAL-ILL070V Board description Figure : Jumper and connector locations LED Cathode LEDAnode Reg_out* Switch_off* Reg_in* PWMDim AC Mains 0-0 Interface VAUX PWM input Con J J J J J Pin Signal name LED Cathode LED Anode Table : Description of the jumper and connector signals Dir Output Output Description and use Connect to the cathode of the LED string Connect to the anode of the LED string AC mains Input First connection to AC Mains Warning high voltage AC mains Input First connection to AC Mains Warning high voltage AUX Output 0-0 Interface Input Regulated V signal with ma capability suitable to supply a variable resistor to drive 0-0 V interface A voltage between this pin and sets the level of output current: 0 V sets the maximum IOUT while any voltage between V and 0 V sets the minimum current Ground Secondary side signal reference voltage Ground Secondary side signal reference voltage PWM Input Input A PWM signal applied to this terminal sets an output current proportional to signal s duty cycle. The recommended PWM signal amplitude is between. V and V. The recommended PWM signal frequency is between 00 Hz (especially when U is used, see Figure for reference) and khz (especially when original configuration is used). Ground Secondary side signal reference voltage Ground Secondary side signal reference voltage Reg_out Input Output of the optional external Voltage regulator (not provided) /7 DocID0099 Rev

3 STEVAL-ILL070V Con Pin Signal name Dir Switch_off Input Reg_in Output PWM_dim Input Same as J, (PWM Input) Description and use Board description Set this pin to. V to turn off the LED string. Set to 0 V or left open during normal operation Unregulated output to supply the optional external Voltage regulator (not provided). Assemble R9 (0R0) to activate this function DocID0099 Rev /7

4 Schematic diagrams STEVAL-ILL070V Schematic diagrams Figure : STEVAL-ILL070V schematic of constant current regulation section F A D Q D N8WS BCX- BAVW VCC Aux_ZCD R k VRECT D R STTH08 k Aux_ZCD HVSU D7 VCC BAVW C0 00n CTRL GD CS U CS 7 HVLED00A ZCD ZCD R k C 00n D N8WS C TOFF FB 00n R8 0k D R9 GD RV N8WS.7k S07 K00 R C9 R k R C8 n.k Q 0k n N700 C0 n C 00p R 0 L N TOFF GD FB VRECT ZCD CTRL CS VCC R9 0R0 TSLER800 SecAux Core - ER8 Lpri = 0uH (%) (-7) <-> (-9) = (-7)+(-9) <-> (-)+(-) =. (-7)+(-9) <-> (-8) =. (-) + (-) <-> (-) =.8 Isat_pri(sec) >=.A (.A) T TSLER800 D STTH80 Vsec SecAux C9 n 00Vac - Y U TCLT007 Vdiv_out D0 VCC_Micro Switchoff BAV9W R0 k PWMDim R k COM_OUT D0 Vsec R 0k C 00p Vos J LED out BAVW VREF =.V C u COM_OUT Vout = 0V to 8V.. Vovp =.V Iout = 0.7A (Imax.A - during protection) Q MMBTA0 V R R7 8k k C0 00p VREF_V IREF = 7mV R 70k SecAux Q BC87- C u R k - + R 0M BR RV KBP08M S07 K00 R 0k C7 0n R0 k D9 N8WS J Mains Connector 90-0 Vac C.u C 00u R9 k Q MMBTA HVSU C D u PKE-00A V - 0 C D C BZX8-C8,.7u C.n R 00V 0R0 T 7mH R9 0k TOFF C8 00n R7 0k R 00 Q STF0LN80K R 0R8 TP TP TP TP TP TP TP7 TP8 TP9 TP0 TP TP VCS VTOFF VGD _PRI _SEC VZCD FB Vcc_sec VRECT VCTRL VCC C 00p kv R.k C R8 n 0k C R 0n 0k C 00n R 0R7 R8 0R7 D8 RSB R 0k J IoT dongle C 0n C.7u R 00k U C7 TLAI 0u R0 0k R7 8.k R0.7k D N8WS R 00k FB CTRL VCC 8 8 VCC 0 GD 9 R 0R8 OUT CV- U TSM0 7 CC- THD optimizer HS heatsink VREF CV+ CC+ Vout discharge /7 DocID0099 Rev

5 STEVAL-ILL070V Figure : STEVAL-ILL070V schematic of dimming interface section Schematic diagrams Vos V D N8WS R 70k D MMZV8 JP 0R0 Switchoff U TSX + D9 SMAZ Q9 MMBTA0 R7 70k VREF_V R k R 0 RT. t D MMSZ97 PWMDim JP Q7 L = 00mils (7.mm) BC87- R k D7 N8WS J PWM DIM JP L = 00mils (7.mm) - R 0k C 00n R9 8k C7 00n D8 MMZ8V Q8 BC87- R8 0k TurnOff circuit Assemble JP to turn off from Dimming port C8 0n R7 k R 0k R0 70k R8 00k J V DIM_0-0 R 0 0-0V R 0k C9 n U TCLT007 Inverted Logic signal Ftyp = khz (for performances) Amplitude =.V to V (up to 0V tolerant) Isolated interface can be configured removing JP, JP and assembling PC87 opto When Opto is assembled Fsw = 00Hz and Log behavior is achieved DocID0099 Rev /7

6 Revision history STEVAL-ILL070V Revision history Table : Document revision history Date Version Changes 0-Oct-07 Initial release. /7 DocID0099 Rev

7 STEVAL-ILL070V IMPORTANT NOTICE PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries ( ST ) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. 07 STMicroelectronics All rights reserved DocID0099 Rev 7/7