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OCP8129
High Current and High Efficiency Backlight WLED Controller
For Medium or Large LCD Panels
General Description
The OCP8129 is the LED driver controller IC which
loads the constant current driver of LED driver for use in
backlighting LCD display from 26to 56+ and other
LED lighting applications. OCP8129 is a high current
and high efficiency backlight LED driver controller for
improved backlight reliability and efficiency. The
operation frequency is user-defined with spread
spectrum operation feature that minimizes system EMI
during operation.
The OCP8129 supports external PWM dimming,
providing the most flexible solution for LED display
applications.
The OCP8129 provides all protection: the MOSFET
over current protection (OCP), LED short circuit
protection (SCP), LED open circuit protection, inductance
short circuit protection, FB Over-voltage Protection Latch,
over load protection, under-voltage lock-out (UVLO),
GATE pin clamper and internal over temperature
protection, external synchronization function. The PWM
frequency can be synchronized to an external pulse
signal.
The OCP8129 is available in SOP-8L package, and
it is RoHS compliant and 100% lead Pb free. Operating
temperature range of the OCP8129 is from -40°C to
85°C.
Features
Number of LEDs in series limited by external
MOSFETs rating
Spread Spectrum Feature on Operating
Frequency for EMI
Maximum Duty Cycle Limit
Support External EN PWM Dimming
Synchronized Operation with External Signal
External MOSFET Over Current Protection
LED Open Circuit Protection
LED Short Circuit Protection
LED +/- Short to GND Protection
FB Over Voltage Protection Latch
Inductance Short Circuit Protection
GATE pin Clamper
LED Fault Status Feedback
RSET Pin Short Circuit Protection
Under-voltage lock-out
Internal Over Temperature Protection
Linear Voltage Compensation
Power On Soft Start
Wide Supply Voltage Range: 10V ~ 30V
Low Standby current <2uA
TA= -40 ~ 85
Available in SOP-8L Package
Applications
LCD White or RGB Backlighting
LCD TVs
Automotive and Infotainment Displays
Battery Powered LED Lamps
Other DC/DC LED Drivers
General LED Lighting Applications
General Purpose Constant Current Source
Signage and Decorative LED Lighting
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Pin Configuration
SOP-8L (Top View)
OCP8129
Pin
Name
VCC
EN/PWM
SYNC
RSET
FB
Pin No.
SOP-8L
1
2
3
4
5
FLG
GND
GATE
6
7
8
Figure 1, Pin Assignments of OCP8129
I/O Pin Function
P Power Supply Input
I Enable Pin, On/Off control for the controller and external
I Synchronization Signal Input Pin
I/O Set the Operation Frequency Resistance Pin
I/O
Set LED Current. Connect a setting resistor from this pin to GND.
The LED Current is programmed by ILED=VFB/(Setting Resistance).
I/O
Fault Operation Status Output (Open Drain Output). If FLG fault
function is not used, the FLG pin should be floating.
P Ground
O External MOSFET Gate Drive
Typical Application Circuit
Figure 2, Typical Application Circuit of OCP8129
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OCP8129
Ordering Information
OCP8129XXX
Package
S:SOP-8L
Packing
A:Tape&Reel
Temperature Grade
D: -40°C~85°C
Part Number Package Type
OCP8129SAD
SOP-8L
Package Qty
Temperature
13-in reel 2500pcs/reel -4085
Eco Plan
Green
Lead
Cu
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