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OB3362F

4 Channels High Performance LED Driver


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OB3362F pdf
OB3362F
4 Channels High Performance LED Driver
GENERAL DESCRIPTION
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.
TYPICAL APPLICATION
FEATURES
„ 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
APPLICATIONS
„ LCD Monitor
„ LCD TV
„ Flat panel display
OB3362F is offered in 16-pin ESOP/DIP
Figure1: OB3362F Typical Application Schematic
©On-Bright Electronics
Confidential
-1-
Preliminary Datasheet
OB_DOC_DS_3362F00



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OB3362F pdf
OB3362F
4 Channels High Performance LED Driver
Absolute Maximum Ratings
Parameter
Vin Input Voltage to GND
FAULT to GND
LEDX to GND
I/O to GND
Operating Ambient Temp. TA
Operating Junction Temp. TJ
Min/Max Storage Temp. Tstg
Lead Temp. (10 Sec)
Value
-0.3V to 40V
Vin-7V to Vin
-0.3V to 40V
-0.3V to 7V
-20~ 85
150
-55~150
260
Note: Stresses beyond those listed under “absolute maximum
ratings” may cause permanent damage to the device. These
are stress ratings only, functional operation of the device at
these or any other conditions beyond those indicated under
“recommended operating conditions” is not implied. Exposure
to absolute maximum-rated conditions for extended periods
may affect device reliability.
Recommended Operating Range
Parameter
Vin Voltage
Operating Frequency
Value
6V to 30V
100KHz to 600KHz
Ordering Information
Part Number
OB3362FRP
OB3362FHP
OB3362FHPA
Description
DIP16, Pb-free in Tube
ESOP16, Pb-free in Tube
ESOP16, Pb-free in T&R
Marking Information
©On-Bright Electronics
Confidential
-2-
Preliminary Datasheet
OB_DOC_DS_3362F00



Part Number OB3362F
Description 4 Channels High Performance LED Driver
Maker On-Bright - On-Bright
Total Page 13 Pages
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