NCP1370 Series

LED Driver, Dimmable Quasi-Resonant Primary Side Current-Mode Controller for TV Backlight

Catalog

LED Driver, Dimmable Quasi-Resonant Primary Side Current-Mode Controller for TV Backlight

Part	Number of Outputs	Type	Mounting Type	Package / Case	Package / Case [y]	Package / Case [x]	Dimming	Operating Temperature [Min]	Operating Temperature [Max]	Applications	Supplier Device Package	Internal Switch(s)	Voltage - Supply (Max) [Max]	Topology
ON Semiconductor NCP1370BDR2G	1	DC DC Controller	Surface Mount	8-SOIC	3.9 mm	0.154 in	Analog PWM	-40 °C	125 ¯C	Backlight Lighting	8-SOIC		26 V	Flyback SEPIC Step-Down (Buck) Step-Up (Boost)

Catalog

LED Driver, Dimmable Quasi-Resonant Primary Side Current-Mode Controller for TV Backlight

Key Features

• Accurate Primary Side Sensing

• Quasi−resonant Peak Current−mode Control Operation

• Line Feed−forward

• Programmable Cycle−by−Cycle Peak Current Limit

• Analog and/or PWM dimming

• Secondary Diode Short Protection

• VCCUndervoltage and overvoltage protection

• Open and Shorted Output LED Protection

• Brown−out

Description

The NCP1370 is a PWM current mode controller targeting isolatedflyback and non−isolated constant current topologies. The controlleroperates in a quasi−resonant mode to provide high efficiency. Thanksto a novel control method, the device is able to precisely regulate aconstant LED current from the primary side. This removes the needfor secondary side feedback circuitry, biasing and an opto−coupler.The device is highly integrated with a minimum number of externalcomponents. A robust suite of safety protection is built in to simplifythe design. This device supports analog/digital dimming and bothmodes can be combined to enhance dimming precision. The NCP1370has a programmable peak current limit to optimize designcompatibility over a wide range of applications. The controllerfeatures a standby mode with reduced current consumption.