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

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Overview

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.

  • LED TV's Backlight Controller
  • LED TV's
  • LED Power supply
  • LED Light Engines
  • 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
  • VCC Undervoltage and overvoltage protection
  • Open and Shorted Output LED Protection
  • Brown−out

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NCP1370ADR2G

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CAD Model

Pb

A

H

P

SOIC-8

3

260

REEL

2500

N

Flyback

9.4

26

200

3000

Up to 150

Price N/A

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NCP1370BDR2G

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Active

CAD Model

Pb

A

H

P

SOIC-8

3

260

REEL

2500

N

Flyback

9.4

26

200

3000

Up to 150

$0.3867

More Details

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