BL8080 Datasheet, PDF (1/10 Pages) SHANGHAI BELLING CO., LTD. – HIGH INTEGRATED PWM CONTROLLER

BL8080
GENERAL DISCRIPTION
The BL8080 is a PWM controller designed to
drive high voltage NPN transistors. It integrates
an oscillator, cycle-by-cycle current limit,
thermal protection and over voltage protection,
great reducing the number of external
components and system level cost.
Compared to conventional controller, BL8080
has a significantly smaller startup current of
less than 20uA, which allows large startup
resistor that enabes further power saving. The
frequency can be adjusted from an external
capcitor. At light load condition the frequency of
BL8080 can be varied according to the load,
which improves the light load efficiency.
HIGH INTEGRATED PWM CONTROLLER
FEATURES
 Low start up current
 Easy programmable frequency
 Compact SOT23-6 package
 Universal voltage range: 85VAC -264VAC
 Thermal shutdown
 Cycle by cycle current limit
 Slope current drive
 Low standby power consumption
APPLICATIONS
 Cell phone charger
 DVD player power supply
 MP3 charger
 LED lighting driver
TYPICAL APPLICATION CIRCUIT
AC Input
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6 CT
OB 1
5 GND ^{OE 2}
4 FB VCC 3
BL^L8^C0⁸8¹0⁰
Figure1: BL8080 Typical Application Circuit
1
DC Output