FAN73402 Datasheet, PDF (1/16 Pages) Fairchild Semiconductor – LED Backlight Driving Boost Switch

July 2012
FAN73402
LED Backlight Driving Boost Switch
Features
 Single-Channel Boost LED Switch
 Internal Power MOSFET for PWM Dimming:
R_DS(ON)=1.0Ω at V_GS=10V, BV_DSS=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)
 Error Flag Generation (for External Load Switch)
 Internal Soft-Start
 16-Lead SOIC Package
Applications
 LED Backlight for LCD TV
 LED Backlight for LCD Monitor
 LED Lighting
Description
The FAN73402 is a single-channel boost controller that
integrates an N-channel power MOSFET for PWM
dimming using Fairchild’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.
Ordering Information
Part Number
Operating
Temperature Range
Package
Packing Method
FAN73402MX
-40°C to +125°C
16-Lead, Small-Outline Integrated Circuit (SOIC)
Tape & Reel
© 2012 Fairchild Semiconductor Corporation
FAN7340 • 1.0.0
www.fairchildsemi.com