Fairchild Semiconductor's LED Drivers for Mobile Handsets

Jun 5, 2010 Fairchild Semiconductor introduces two LED drivers, FAN5701 and FAN5702 which deliver 92 percent peak efficiency and are designed for mobile handsets, gaming devices, MP3 players and other small display applications.

The FAN5701 and FAN5702 are 1x to 1.5x charge pump-based 180mA, 6-channel LED drivers that backlight TFT LCD displays in mobile electronics. Their transition voltage fr om 1x to 1.5x mode allows them to operate in 1x mode for a longer time period.

The FAN5702 is a configurable, 180mA, 6-channel LED driver with I(2)C interface and provides:
-- Design flexibility.
-- An I(2)C interface.
--Each LED output supports 64 logarithmic-dimming steps.
-- An enable pin, providing the baseband chipset direct control to turn it on or off.
-- A PWM signal input to support dynamic backlight control (DBC).
-- A DBC feature with an ambient light sensor providing both dynamic backlight and ambient light control, saving up to 50 percent in power consumption.

The FAN5701 is a cost-effective LED driver that uses two PWM inputs to control the brightness of a grouping of four and two LED outputs. It is ideal for applications wh ere there is a requirement to backlight two LCD displays or to drive a high brightness LED for low power camera flash in mobile handsets.

The FAN5701 and FAN5702 are housed in 16-bump WL-CSP and 16-lead UMLP packages. In WL-CSP form factor the FAN5701 and FAN5702 occupy 2.56mm(2).
The FAN5701 is priced at US$0.72 rice (each 1,000pcs), and FAN5702 is priced at US$0.95. FAN5701 and FAN5702 in WL-CSP form factor is in production now while the UMLP package version will be available in June 2010.

www.fairchildsemi.com

Author:  BIO T&T

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