|
|
PDF OB3372 Data sheet ( Hoja de datos )
| Número de pieza | OB3372 | |
| Descripción | High Power Dual output LED Driver | |
| Fabricantes | On-Bright | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de OB3372 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
OB3372
High Power Dual output LED Driver
GENERAL DESCRIPTION
The OB3372 is a high power dual output LED
driver optimized for large size LED backlighting
application. It integrates two independent boost
converters, providing a high performance and high
reliability LED backlighting solution.
It incorporates two boost converters operating in
current mode PWM control at fixed frequency. The
operation frequency is programmed from 100 kHz
to 600 kHz by setting an external resistor at RT
pin.
The OB3372 can be configured for Master-Slave
operation to support multi-channel applications.
The voltage across LED current sense resistor is
regulated to about 600mV to reduce power loss
and improve efficiency.
The external PWM dimming mode is supported.
The PWM dimming signal is injected externally
from DIM pin.
The OB3372 offers comprehensive protection
such as power MOSFET over current protection
(OCP), output over voltage protection (OVP), IC
power supply under voltage lockout (UVLO), and
LED open & short protection.
FEATURES
High Power Dual Output PWM Control
8V to 35V Input Voltage Range
Master/Slave Synchronization Capability
Programmable 100kHz~600kHz Operation
Frequency
Programmable Slope Compensation
External PWM Dimming Mode
Over Voltage Protection
Over Current Protection
Under Voltage Lockout (UVLO)
LED Open Protection
LED Short Protection
APPLICATIONS
LCD TV
LCD Monitor
Flat panel display
TYPICAL APPLICATION
L2
D2
VIN
GND
ENA
DIM
CIN
SYNC
Fault
Driver
Circuit
Q5
L1
RSC
RRT
CCMP1
CCMP2
CHCP
1 SC
VIN 20
2 RT
GATE2 19
3 CMP1
GATE1 18
4 CMP2
GND 17
OB33725 HCP
6 SYNC
CS2 16
CS1 15
7 ENA
LSD2 14
8 DIM
FB2 13
9 OVP1
LSD1 12
10 OVP2
FB1 11
CVIN
Q2
Q1
RCS1
RCS2
D1
ROVP2A
ROVP2B
CO2
ROVP1A CO1
ROVP1B
Q3
RFB1
Q4
RFB2
Figure1: OB3372 Typical Application Schematic
©On-Bright Electronics
Confidential
-1-
Preliminary Datasheet
OB_DOC_DS_337202
1 page  
OB3372
High Power Dual Output LED Driver
Electrical Characteristics
VIN=12V, ENA=5V, RT=20k ohm to ground, TA=25℃, if not otherwise noted.
Parameter
Symbol
Test Conditions
Min Tyc Max Unit
Supply Voltage
Operating
Input
Voltage
Supply
(Quiescent)
Supply
(Disable)
Current
Current
UVLO(OFF)
UVLO (ON)
ENA ON Threshold
ENA OFF Threshold
ENA pull down resistor
RT Voltage
Oscillator
Operation Frequency
Operation Frequency
SYNC input high
voltage
SYNC input
voltage
low
SYNC rising time
SYNC falling time
PWM Control
Feedback voltage for
FB
Lead edge blanking
time
Maximum Duty Cycle
Slope rate of soft start
Error Amplifier
Input common-mode
range
Output voltage range
Transconductance
Maximum
Current
Output
PWM Dimming
DIM High Threshold
DIM Low Threshold
Gate drive
Clamp of GATE output
GATE rising time
GATE falling time
Protection
OVP Over Voltage
Threshold
FAULT
protection
threshold
Blanking time of LED
fault detection
VIN
IVIN-op
IVIN-disable
UVLO_off
UVLO_on
ENA_on
ENA_off
RENA
VRT
Fop
Fop
VSYNC-H
VSYNC-L
Tr_sync
Tf_sync
VFB
TLEB
Dutymax
SRSS
VCM
Vo
Gm
Icomp
Vpwmi_h
Vpwmi_l
Vclamp_gate
Ts
Tf
Vovp_ov
Vth_fault
Tblanking_FB
Vin=12V, DIM=5V, no
load
8V<Vin<35V, ENA=0V,
disable mode, no load
Rising edge
8
ENA rising
ENA falling
2.8
RT=60k
RT=10k
1.6
Csync=1nF,10%-90%
Csync=1nF,10%-90%
35 V
3 5 mA
4 10 uA
6.8
6.5
1
100
1.2
V
V
V
V
kΩ
V
100 kHz
600 kHz
V
1.2
350
250
V
ns
ns
570 600 630 mV
250 ns
85 90 95 %
13 V/s
0 3.5 V
1 4V
100 uA/V
65 uA
CGATE=2nF,10%-90%
CGATE=2nF,10%-90%
2V
1.8 V
11 V
80 ns
40 ns
Rising edge
2V
100 mV
500 ns
©On-Bright Electronics
Confidential
-5-
Preliminary Datasheet
OB_DOC_DS_337202
5 Page 
Package Mechanical Data: SOP20
OB3372
High Power Dual Output LED Driver
Symbol
A
A1
A2
b
c
D
E
E1
e
L
θ
Dimensions In Millimeters
Min Max
2.350
2.650
0.100
0.300
2.050
2.550
0.310
0.510
0.200
0.330
12.520
13.000
7.400
7.600
10.000
10.610
1.27 (BSC)
0.400
1.270
0º 8º
©On-Bright Electronics
Confidential
- 11 -
Dimensions In Inches
Min
0.093
0.004
0.081
0.012
0.008
0.493
0.291
0.394
0.016
0º
0.05 (BSC)
Max
0.104
0.012
0.100
0.020
0.013
0.512
0.299
0.418
0.050
8º
Preliminary Datasheet
OB_DOC_DS_337202
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet OB3372.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| OB3370N | Cost Effective LED Controller | On-Bright |
| OB3372 | High Power Dual output LED Driver | On-Bright |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |