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PDF OB3362F Data sheet ( Hoja de datos )
| Número de pieza | OB3362F | |
| Descripción | 4 Channels High Performance LED Driver | |
| Fabricantes | On-Bright | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de OB3362F (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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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
1 page  
OB3362F
4 Channels High Performance LED Driver
Electrical Characteristics
VIN=12V, ENA=5V, ISET=60kohm to ground, TA=25℃, if not otherwise noted.
Parameter
Symbol
Condition
Min
Operating Input Voltage
VIN
6
Standby current
Operating supply current
LDO output Voltage
VIN UVLO OFF
VIN UVLO ON
ENA High Voltage
ENA Low Voltage
Istandby
IVCC
VCC
UVLO(OFF)
UVLO(ON)
VENA_H
VENA_L
ENA=0V
No switching,
all LEDX floating
VIN> 11V
9.5
Boost Converter
OSC frequency
OSC Voltage
Maximum Duty Cycle
Minimum On Time/LEB Time
CS Current Limit Voltage
Gate High Level
Gate Rising Time
Gate Falling Time
FOSC
VOSC
Dmax
TON_MIN/TLEB
Vlimited
VH_GATE
TRising
TFalling
RSET=115K ohm
RSET=374K ohm
CLoad = 2nF
CLoad = 2nF
90
170
LED Current Regulation
ISET Voltage
LEDX Current
Current Matching 1
VISET
ILED
RSET=20k ohm
ILED = 90mA
LEDX Regulation Voltage
VLEDX
Low Frequency Oscillator for Burst Mode Dimming
Burst frequency
Triangular waveform
high
low
CBF/DMOD=2.2nF
CBF/DMOD=2.2nF
CBF/DMOD=2.2nF
External LPWM Dimming Control
External LPWM duty
External LPWM Logic input level
high
low
BF/DMOD=0V
BF/DMOD=0V
BF/DMOD=0V
1.2
-
0
2.0
Typ.
3
10
5.4
5.2
1.5
0.96
Max
30
1
Units
V
uA
10.5
mA
V
V
V
V
V
570
170
1.25
140
220 270
10
40
20
KHz
V
%
ns
mV
V
nS
nS
1.2
180
-3
350
V
mA
%
mV
1.6 2
2.2
0.2 -
KHz
V
V
- 100 %
V
0.8 V
©On-Bright Electronics
Confidential
-5-
Preliminary Datasheet
OB_DOC_DS_3362F00
5 Page 
Package Mechanical Data:
OB3362F
4 Channels High Performance LED Driver
Symbol
A
A1
A2
B
B1
C
D
E
E1
e
L
E2
Dimensions In Millimeters
Min Max
3.710
5.334
0.381
2.921
4.953
0.380
0.570
1.524 (BSC)
0.200
0.360
18.800
20.230
6.096
7.112
7.320
8.255
2.540 (BSC)
2.920
3.810
7.620
10.922
©On-Bright Electronics
Confidential
- 11 -
Dimensions In Inches
Min Max
0.146
0.210(0.181)
0.015(0.020)
0.115
0.195(0.150)
0.015
0.022
0.060 (BSC)
0.008
0.014
0.740
0.800
0.240
0.280
0.288
0.312
0.100 (BSC)
0.115
0.150
0.300
0.430
Preliminary Datasheet
OB_DOC_DS_3362F00
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet OB3362F.PDF ] | |
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