White LED PFM Step-Up DC-DC Converter
BL8532B
White LED PFM Step-Up DC-DC Converter
Outline:
The BL8532B is a PFM Step-up DC/DC driver IC with invariant curr...
Description
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
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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...
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