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OCP8122
Dual-Channel high Power LED Controller with DC-DC Converter
For Large LCD or 3D Display Panels
General Description
The OCP8122 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 OCP8122 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
OCP8122 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 OCP8122 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 OCP8122 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 OCP8122 is available in SSOP-24L and
SOP-24L package, and it is RoHS compliant and 100%
lead Pb free. Operating temperature range of the
OCP8122 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 - 5
Contact Information:
For more detail information , please direct any inquiries and/or comments to info@orient-chip.com.
Ver. 1.2 Dec. 04, 2012

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OCP8122
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)
Figure 1, Pin Assignments of OCP8122
Pin
Name
UVLS
VCC
Pin No.
SSOP24L I/O
Pin Function
/SOP24L
1 I Power Supply Under-Voltage Lock-out Detection pin
2 P Input Power for controller and internal MOSFET driver
EN 3 I ON/OFF control for the controller
VREG
4 I/O Internal Regulation Output Voltage pin
RSET
5 I/O Resistor to set operation frequency and master/slave mode
SYNC
6 I/O Operation Frequency Synchronization Signal input / output
PWM1
7
I PWM dimming control for channel 1
PWM2
8
I PWM dimming control for channel 2
ADIM 9 I Analog dimming control for the controller
TIMER 10 I/O Capacitor Setting shutdown delay time
CMP1
11
I/O
Connect resistor and capacitor to set soft start and compensation for
channel 1
CMP2
12
I/O
Connect resistor and capacitor to set soft start and compensation for
channel 2
IFB2 13 I Channel 2 LED Current Sense Input
GATE2
14
O Channel 2 MOSFET driver control
OVP2
15
I Channel 2 Output over-voltage protection sense
CS2 16 I Channel 2 Power MOSFET Switching Current Sense
IFB1 17 I Channel 1 LED Current Sense Input
GATE1
18
O Channel 1 MOSFET driver control
OVP1
19
I Channel 1 Output over-voltage protection sense
CS1 20 I Channel 1 Power MOSFET Switching Current Sense
GND
21 P Ground
SWOUT2
22
O Channel 2 Boost Power MOSFET Drive Output
SWOUT1
23
O Channel 1 Boost Power MOSFET Drive Output
STATUS
24
O Fault Operation Status Output (Open Drain Output)
Page2 - 5
Contact Information:
For more detail information , please direct any inquiries and/or comments to info@orient-chip.com.
Ver. 1.2 Dec. 04, 2012

No Preview Available !

OCP8122
Dual-Channel high Power LED Controller with DC-DC Converter
For Large LCD or 3D Display Panels
Typical Application Circuit
Figure 2, Typical Application Circuit of OCP8122
Ordering Information
Part Number
OCP8122SAD
OCP8122SD
OCP8122SSAD
OCP8122SSD
Package Type
SOP-24L
SOP-24L
SSOP-24L
SSOP-24L
Package Qty
13-in reel
1000pcs/reel
Tube
30pcs/tube
13-in reel
2500pcs/reel
Tube
58pcs/tube
Temperature
-4085
-4085
-4085
-4085
Eco Plan
Green
Green
Green
Green
Lead
Cu
Cu
Cu
Cu
Page3 - 5
Contact Information:
For more detail information , please direct any inquiries and/or comments to info@orient-chip.com.
Ver. 1.2 Dec. 04, 2012