LED Backlight Driving Boost Switch

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Overview

The FAN73402 is a single-channel boost controller that integrates an N-channel power MOSFET for PWM dimming using ON Semiconductor’s proprietary planar Double-diffused MOSFET (DMOS) technology.
The IC operates as a constant-current source for driving high-current LEDs.
It uses Current Mode control with programmable slope compensation to prevent subharmonic oscillation. The IC provides protections including: open-LED protection, over-voltage protection, and direct-short protection for high system reliability.
The IC internally generates a FAULT signal with delay if an abnormal LED string condition occurs. PWM dimming and analog dimming functions can be implemented independently. Internal soft-start prevents inrush current flowing into output capacitor at startup.

  • LED TV
  • Single-Channel Boost LED Switch
  • Internal Power MOSFET for PWM Dimming: RDS(ON)=1.0Ω at VGS=10V, BVDSS=200V
  • Current Mode PWM Control
  • Internal Programmable Slope Compensation
  • Wide Supply Voltage Range: 10V to 35V
  • LED Current Regulation: ±1%
  • Programmable Switching Frequency
  • Analog and PWM Dimming
  • Wide Dimming Ratio: On Time=10µs to DC
  • Cycle-by-Cycle Current Limiting
  • Thermal Shutdown: 150°C
  • Open-LED Protection (OLP)
  • Over-Voltage Protection (OVP)
  • Over-Current Protection (OCP)
  • Internal Soft-Start
  • Error Flag Generation (for External Load Switch)
  • 16-Lead SOIC Package

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FAN73402MX

Obsolete

Pb

A

H

P

SOIC-16

1

260

REEL

2500

N

Step-Up

10

35

4

280

200

Price N/A

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