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OB3362F Datasheet

4 Channels High Performance LED Driver

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4 Channels High Performance LED Driver
The OB3362F is a highly integrated and high
performance LED driver that optimized for LCD
backlight application. It integrates a boost driver
and 4 channels of current balancer that optimized
to drives multi LED arrays, and thus provides a
high performance LED backlight solution with
minimized BOM count.
The OB3362F contains a PWM boost driver which
uses current mode control and fixed frequency
operation. The operation frequency can be
programmed by setting external resistor value at
RI pin.
The OB3362F integrates 4 channels current
balancer with up to 200mA current capability per
channel and it can achieve 3% matching accuracy
among LED strings. The minimum voltage of
current source is regulated to as lower as 350mV,
which benefits the efficiency and improves the IC
thermal performance.
The OB3362F supports external PWM dimming
and internal burst dimming mode which allow
flexible control of the backlight luminance. The
LED current is directly modulated by external
PWM duty cycle when PWM dimming mode is
selected. The LED current can be adjusted by an
external DC voltage when internal burst dimming
mode is selected.
„ 10V gate drive, better MOS compatibility
„ High Efficiency and Compact Size
„ 6V to 30V Input Voltage Range
„ 3% Matching Accuracy Between 4 LED
Strings Control Current
„ 100KHz~600KHz Operating Frequency
„ Internal/External PWM Dimming
„ Very Low Standby Power
„ Programmable Over Voltage Protection
„ Under Voltage Lockout(UVLO)
„ Open/Short LED Protection
„ Thermal Shutdown
„ LCD Monitor
„ Flat panel display
OB3362F is offered in 16-pin ESOP/DIP
Figure1: OB3362F Typical Application Schematic
©On-Bright Electronics
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