BL8532B

BL8532B White LED PFM Step-Up DC-DC Converter Outline: The BL8532B is a PFM Step-up DC/DC driver IC with invariant current, design for LED applications. Thought the external resistance, output current reach 0mA~500mA. A low ripple, high efficiency step-up DC/DC converter can be constructed of BL8532Bxx with only three external components. Also available is a CE (chip enable) function that reduce power consumption Features: Low start voltage：0.8V ( at Iout=1mA)； Output Current range：0~ 500mA； Output Current accuracy：±10%； High Efficiency：82%(Type)； PACKAGE： SOT-89-5. Applications： Power source for white LED Supply constant current Power source for a single or dual-cell battery-powered equipments Selection guide： BL8532B-XX X XX Package: SN：SOT-89-5 Pin configuration： □□BL8532B- PSN Temperature range: C：standard P：standard （Pb free） Feedback voltage: 10……100mV 20……200mV 25……250mV 30……300mV 35……350mV 40……400mV Pin No. 1 2 3 4 5 Symbol IFB Vout CE Lx GND Description Current feedback pin Output pin, power supply for internal circuits Chip enable pin (active high) Switching pin(Nch open drain) Ground pin http://www.belling.com.cn - 1Total 13 Pages 2/20/2013 Functional block diagram ： BL8532B Absolute maximum ratings: PARAMETER VIN Input Voltage Lx Pin voltage CE Pin voltage IFB output voltage Lx Pin current Continuous SOT-23-5 Total Power Dissipation SOT-89-5 Maximum Operating Ambient Temperature Operating Ambient Temperature Storage Temperat...