OB3362F
4 Channels High Performance LED Driver
GENERAL DESCRIPTION
FEATURES
The OB3362F is a highly integrated and high
performance LED driver that optimized for LCD
10V gate drive, better MOS compatibility
High Efficiency and Compact Size
backlight application. It integrates a boost driver 6V to 30V Input Voltage Range
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
3% Matching Accuracy Between 4 LED
Strings Control Current
T 100KHz~600KHz Operating Frequency
V Internal/External PWM Dimming
I Very Low Standby Power
operation. The operation frequency can be
programmed by setting external resistor value at
o RI pin.
t The OB3362F integrates 4 channels current
balancer with up to 200mA current capability per
channel and it can achieve 3% matching accuracy
l among LED strings. The minimum voltage of
a current source is regulated to as lower as 350mV,
which benefits the efficiency and improves the IC
i thermal performance.
t The OB3362F supports external PWM dimming
n and internal burst dimming mode which allow
flexible control of the backlight luminance. The
e LED current is directly modulated by external
d PWM duty cycle when PWM dimming mode is
i selected. The LED current can be adjusted by an
external DC voltage when internal burst dimming
f mode is selected.
Con TYPICAL APPLICATION
Programmable Over Voltage Protection
Under Voltage Lockout(UVLO)
Open/Short LED Protection
Thermal Shutdown
APPLICATIONS
LCD Monitor
LCD TV
Flat panel display
OB3362F is offered in 16-pin ESOP/DIP
On-Bright
Figure1: OB3362F Typical Application Schematic
©On-Bright Electronics
Confidential
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Preliminary Datasheet
OB_DOC_DS_3362F00