Fairchild Semiconductor's LED Backlight Boost Switches Reduce Power Losses, Minimize Sub-Harmonic Oscillation in High-Power LED Applications

These backlight driving boost switches use a current-mode control topology with programmable slope compensation to prevent sub-harmonic oscillation. Designed with an internal dimming and analog pulse-width modulation (PWM), these devices overcome the short falls of a DCM boost converter by achieving a fast PWM dimming response.



Both devices offer integrated protection features such as under-voltage lockout, open LED protection, and over-voltage protection that help to minimize component count. Additionally, these devices provide error prevention by generating a FAULT signal with delay if an abnormal LED string condition occurs.



Features and Benefits:

FAN7340: RDS(ON) = 3.4Ω at VGS = 10V, BVDSS = 400V

FAN73402: RDS(ON) = 1.0Ω at VGS = 10V, BVDSS = 200V

Wide-supply voltage range: 10V to 35V

Cycle-by-cycle current limiting

Internal soft-start prevents in-rush current flowing into output capacitor at startup

Programmable switching frequency



Packaging and Pricing Information (in US 1,000 quantity pieces)

Samples available upon request - Delivery 8-12 weeks ARO

Both available in a 16-lead SOIC package the FAN7340 is priced at $0.85 and the FAN73402 is

priced at $1.06



Fairchild enables engineers to drive innovation in their designs by developing solutions like the FAN7340 and FAN73402. The company offers a broad portfolio of full range power semiconductor devices that cover high-, mid-, and low-power ranges to help designers maximize energy savings in virtually every

power-sensitive application.