OCP8122A Controller Datasheet

OCP8122A Datasheet, PDF, Equivalent


Part Number

OCP8122A

Description

Dual-Channel high Power LED Controller

Manufacture

Orient Chip

Total Page 3 Pages
Datasheet
Download OCP8122A Datasheet


OCP8122A
OCP8122A
Dual-Channel high Power LED Controller with DC-DC Converter
For Large LCD or 3D Display Panels
General Description
The OCP8122A is dual channel LED driver
controller IC which loads the boost DC-DC controller
and the constant current control of LED driver designed
to build LED backlight for 3D LCD display mode
large-size LCD TV application.
The OCP8122A provides two independently
controlled LED drivers to achieve optimum efficiency.
The drive outputs are phase-shifted by 180 degree to
minimize current ripple in high power applications. The
OCP8122A provides independent PWM dimming
function for each channel and common analog dimming
control for both channels. It provides system design
flexibility for LCD-TV with local dimming or 3D display
mode.
The OCP8122A can be configured for Master-Slave
operation to support multi-channel applications.
Synchronization is achieved by a proprietary single-wire
interface which minimizes system components.
The OCP8122A provides the over-voltage
protection (OVP), Power MOSFET over-current
protection (OCP), Output to ground short-circuit
protection, output over load protection, Soft-Start (SS),
under-voltage lock-out (UVLO), limited current condition
(LCC) protection, thermal shutdown protection (TSD). A
soft-start feature is provided to minimize in-rush current
during start-up.
The OCP8122A is available in SSOP-24L and
SOP-24L package, and it is RoHS compliant and 100%
lead Pb-free. Operating temperature range of the
OCP8122A is from -40°C to 85°C.
Features
Wide Supply Voltage Range: 8.0V ~ 25V
Dual Channel DC-DC Controller
Drives One String of High Power LEDs per
Channel
Number of LEDs in series limited by external
MOSFETs rating
180 degree phase shift drive output between the
two channel
Independent PWM dimming control for each
channel
Common Analog Dimming for two channel
Constant Operation Frequency
Operation Frequency Synchronization
External Power MOSFET Over-Current
Protection
External enable control
Integrated high frequency oscillator
Over-voltage protection
Output to Return Short-circuit Protection
Output to Ground Short-circuit Protection
Output Over-Load Protection
Limited Current Condition Protection
Low in-rush current soft-start function
Under-voltage lock-out
Thermal shutdown
Fault Status Output
Low Standby current
TA= -40 ~ 85
Available in SSOP-24L and SOP-24L Package
Applications
LCD White LED Backlighting
LCD TVs
Automotive and Infotainment Displays
3D Mode Display LCD Panel
Page1 - 3
Rev. 1.3 Feb .27, 2018
源于灿瑞 磁传天下

OCP8122A
OCP8122A
Dual-Channel high Power LED Controller with DC-DC Converter
For Large LCD or 3D Display Panels
Pin Configuration
SSOP-24L/SOP-24L (Top View)
Pin
Name
UVLS
VCC
EN
VREG
RSET
SYNC
PWM1
PWM2
ADIM
TIMER
CMP1
Pin No.
SSOP24L
/SOP24L
1
2
3
4
5
6
7
8
9
10
11
CMP2
IFB2
GATE2
OVP2
CS2
IFB1
GATE1
OVP1
CS1
GND
SWOUT2
SWOUT1
STATUS
12
13
14
15
16
17
18
19
20
21
22
23
24
Figure 1, Pin Assignments of OCP8122A
I/O Pin Function
I Power Supply Under-Voltage Lock-out Detection pin
P Input Power for controller and internal MOSFET driver
I ON/OFF control for the controller
I/O Internal Regulation Output Voltage pin
I/O Resistor to set operation frequency and master/slave mode
I/O Operation Frequency Synchronization Signal input / output
I PWM dimming control for channel 1
I PWM dimming control for channel 2
I Analog dimming control for the controller
I/O Capacitor Setting shutdown delay time
I/O
Connect resistor and capacitor to set soft start and compensation for
channel 1
I/O
Connect resistor and capacitor to set soft start and compensation for
channel 2
I Channel 2 LED Current Sense Input
O Channel 2 MOSFET driver control
I Channel 2 Output over-voltage protection sense
I Channel 2 Power MOSFET Switching Current Sense
I Channel 1 LED Current Sense Input
O Channel 1 MOSFET driver control
I Channel 1 Output over-voltage protection sense
I Channel 1 Power MOSFET Switching Current Sense
P Ground
O Channel 2 Boost Power MOSFET Drive Output
O Channel 1 Boost Power MOSFET Drive Output
O Fault Operation Status Output (Open Drain Output)
Page2 - 3
Rev. 1.3 Feb .27, 2018
源于灿瑞 磁传天下


Features WWW.ORIENT-CHIP.COM OCP8122A Dual-Chann el high Power LED Controller with DC-DC Converter For Large LCD or 3D Display Panels ◼ General Description The OCP 8122A is dual channel LED driver contro ller IC which loads the boost DC-DC con troller and the constant current contro l of LED driver designed to build LED b acklight for 3D LCD display mode large- size LCD TV application. The OCP8122A p rovides two independently controlled LE D drivers to achieve optimum efficiency . The drive outputs are phase-shifted b y 180 degree to minimize current ripple in high power applications. The OCP812 2A provides independent PWM dimming fun ction for each channel and common analo g dimming control for both channels. It provides system design flexibility for LCD-TV with local dimming or 3D displa y mode. The OCP8122A can be configured for Master-Slave operation to support m ulti-channel applications. Synchronizat ion is achieved by a proprietary single -wire interface which minimizes system components. The OCP8122A.
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