WS3620 Product Description WS3620 Single Channel LED Constant Current Dr iver Driver Features General Description ■ Output current adjustable WS3620 is a single channel LED constant current driver ■ Inter-chip output current deviation <±4% which integrates patented constant current setting and ■ Over temperature protection ■ Sharing PCB board with LED lamps control technology. The output current designed by ■ Excellence EMI performance external REXT is 5mA~60mA and it is invariant to output ■ Simple circuit and low cost voltage change, which has better constant current performance. Applications It is a low cost circuit with simple circuit and less external ■ T5/T8 LED tubers components. ■ LED street lighting WS3620 TO252 and ESOP-8 Package。 ■ LED bulb lamp，LED ceiling lamp LED- LED+ Typical Application Diagram 1 OUT 2 GND 3 RE X T R1 AC W/T-DE033-Rev.A/0 May.2014 WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS Copyright@Winsemi Microelectronics Co., Ltd., All right reserved. WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS 0514 WS3620 Product Description n Definition and Device Marking Pi Pin WS620 is available in TO252 and ESOP-8 package: 2 REXT 3 RE X T1 2 GND2 3 RE X T2 4 8 WS3620E8P GND GND1 1 AXB YM 1 WS3620DP AXB YM OUT NC WS3620: A: product code 7 OUT1 X：Inner code 6 N C B：region code 5 OUT2 YM：year code，month code Pin Function Description Pin Name Pin Number Function Description OUT 1 Power input and constant current output GND 2 GND REXT 3 Output current setting port Function Block OUT 0 .6 V 5V REF + VDD G EN EA Temp-Adjust GND WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I REXT M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS 2/7 WS3620 Product Description Order Information Package IC Marking Information Purchase Device Name 8-Pin ESOP-8, Pb-free WS3620E8P WS3620E8P 2-Pin TO-252, Pb-free WS3620DP WS3620DP Absolute Maximum Ratings Symbol Parameter Value Unit VOUT OUT Voltage -0.5~250 V IOUT OUT Current 1~60 mA VREXT REXT Voltage -0.5~7 V TJ Operating junction temperature 150 ℃ TSTG Storage temperature -55~150 ℃ Note Note: Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, functional operation of the device at these or any other conditions beyond those indicated in the Recommended Operating Conditions section are not implied. Exposure to absolute maximum-rated conditions for extended periods may affect device reliability. Thermal Resistance Parameter symbol Description ESOP8 TO252 Unit RTHJA Thermal resistance 89.2 74.9 ℃/W Note：Chip to be welded on the PCB plate with 200mm2 copper foil ,thickness of copper foil is 35um。 Electrical Characteristics (TA=25℃，OUT=10V if not otherwise noted)) Symbol VOUT_MIN VOUT_BV Parameter Condition Minumum Voltage of OUT Pin The breakdown voltage of OUT Pin Min Typ IOUT=30mA IOUT=0 Max Unit 6.5 V 250 V IOUT Output current VCC Rise 5 Iop Operation Current VOUT=10V，REXT floating 0.16 VREXT REXT voltage VOUT=10V 0.6 V DIOUT IOUT deviation IOUT=20mA ±4 % 120 ℃ Over-temperature TSC Protection point WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS WIN SEM I 60 mA 0.25 mA M ICROELECTRON ICS 3/7 WS3620 Product Description Function Description Input Capacitor Output Current Setting The larger capacitance C2 produces smaller voltage ripple Output current can be set by Rext Resistor, the formula is: to Vin, and keeps small ripple to SM2082 output voltage. C2 capacitance depends on total operating current V 0.6 Iout = REXT = Re xt Re xt from LED tubes: the more current generates the more C2 capacitance (usually 4.7uF/400V~22uF/400V). The formula is shown below: Efficiency Design C= Below shows the application circuit efficiency formula： η= t * I LED ∆V ILED is output current, time t = 1/4/Fac=5mS, △V is output voltage ripple。 PLED n * VLED * I LED n * VLED = = PIN VIN * I LED VIN Vin is system input power voltage. VLED is single LED drop Increase Output Power voltage. ILED is LED current. It is can be seen thatlarger quantities of series LED in system brings higher efficiency. In system design,WS3620 output operating voltage is based on application environment so that it optimizes N value. The quantity of chip is based on the amount of parallel connection groups and lights operating current of LED tubes. In the diagram below, resistor of REXT1~REXT2 can be the same or different. In IC parallel application, when Rext value is different, the LED Series Number Design constant current turn-on voltage in the system is the maximum voltage of parallel WS3620. Designing LED series number in the system should consider two aspects below: 1 OUT output voltage is VOUT = Vin – n*VLED. 2 GND IC 1 3 R EXT (1) To ensure the normal operation, output voltage should R ex t1 be VOUT > VOUT_MIN； (2) Lower output voltage brings higher system efficiency. LE D 1-1 LE D 1-n LE D 2-1 LE D 2-n 2 GND Basing on the two points above, WS3620 output voltage range is VOUT_MIN ~ VOUT_MAX and LED series number R ex t2 C3 Vin − VOUT _ MAX VLED <n< M ICROELECTRON ICS www.winsemi.com 1 OUT Vin − VOUT _ MIN 2 GND VLED WIN SEM I GND M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS IC 2 3 R EXT C2 formula is: WIN SEM I 1 OUT 220V~ WIN SEM I IC N 3 R EXT R ex t N M ICROELECTRON ICS 4/7 WS3620 Product Description TO-252 Package Information 6 A4 A3 5 B1 B 4 D H A1 D2 C2 A2 D3 b 2 1 A C1 0<a,b<0.1 C D3 a D1 3 R Dimensions In Millimeters Symbol Min. Max. A 6.50 6.70 A1 0.71 A2 Symbol Dimensions In Millimeters Min. Max. D1 1.40 1.60 0.81 D2 0.81 0.91 2.236 2.336 D3 A3 5.284 5.384 H A4 0.75 0.85 R 0.40TYP B 6.00 6.20 θ1 0°-8° B1 9.80 10.10 θ2 8.5°TYP C 2.20 2.40 θ3 25°TYP C1 0.967 1.087 θ4 10°TYP C2 0.498 0.518 θ5 10°TYP D 0.70 0.90 θ6 70°TYP WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 0.05TYP 0.00 WIN SEM I M ICROELECTRON ICS 0.10 WIN SEM I M ICROELECTRON ICS 5/7 WS3620 Product Description ESOP-8 Package Information E D1 e D E2 b A1 A2 A E1 c L Dimensions In Millimeters Symbol Dimensions In Inches Min. Max. Min. Max. A 1.350 1.750 0.053 0.069 A1 0.050 0.150 0.004 0.010 A2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 D 4.700 5.100 0.185 0.200 D1 3.202 3.402 0.126 0.134 E 3.800 4.000 0.150 0.157 E1 5.800 6.200 0.228 0.244 E2 2.313 2.513 0.091 0.099 e 1.270(BSC) 0.050(BSC) L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8° WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS 6/7 WS3620 Product Description NOTE: 1.We strongly recommend customers check carefully on the trademark when buying our product, if there is any question, please don't be hesitate to contact us. 2.Please do not exceed the absolute maximum ratings of the device when circuit designing. 3.Winsemi Microelectronics Co., Ltd reserved the right to make changes in this specification sheet and is subject to change without prior notice. CONTACT: Winsemi Microelectronics Co., Ltd. ADD:Futian District, ShenZhen Tian An Cyber Tech Plaza two East Wing 1002 Post Code : 518040 Tel : +86-755-8250 6288 FAX : +86-755-8250 6299 Web Site : www.winsemi.com WIN SEM I M ICROELECTRON ICS www.winsemi.com WIN SEM I M ICROELECTRON ICS Tel : +86-755-8250 6288 WIN SEM I M ICROELECTRON ICS Fax : +86-755-8250 6299 WIN SEM I M ICROELECTRON ICS WIN SEM I M ICROELECTRON ICS 7/7