BL8508 - SHANGHAI BELLING

BL8508 White LED driver circuit

BL8508 LED 26 LED LED LED BL8508 900kHz 0.22uF PCB 92mV BL8508 SOT-23-5 : BL8508 LED • LED • 80% • 3V 4 LED • 5V 6 LED • 36V • 2V • 900kHz • • SOT-23-5 • • PDA • • MP3 • 1 SW 2 GND 3 FB 4 CE 5 Vin www.belling.com.cn Ver1.0 1/10 BL8508 : : ---------------------------------------------------------------------------------------- -1.

Features

---------------------------------- 256°C/W : 2 6V -40 25 70 C1 1 µF C2 0.1 0.22 10 µF L1 10 22 47 µH www.belling.com.cn Ver1.0 2/10 BL8508 : ( Topt 25 Vin=3V Vce=3V) Vmin Vmax Vfb Iss Ioff Dmax Ilimit Fsw VCESAT ISWleak VCEH VCEL SW SW SW CE CE CE=0 ISW=250mA VSW=5V SW off C1=1µF C2=0.22µF L1=22uH MURATA LQH-220 D1 CENTRAL SEMICONDUCTOR CMDSH-3 2.0 82 85 0.8 0.95 1.5 : 92 0.7 0.1 90 320 0.9 1.05 0.5 V 10 V 102 mV 1.0 mA 1.0 uA % mA 1.0 MHz 1.25 V 1 uA V 0.8 V : SW Pin1 EMI GND Pin2 FB Pin3 NMOS FET SW LED R1=92mV/ILED www.belling.com.cn Ver1.0 3/10 BL8508 ILED(mA).