Date: 05/08/2010

Current sink LEDs for backlighting of LCD displays and keyboards in mobile electronics

Fairchild Semiconductor is sampling FAN5622/24/26 two-, four-, and six-channel current-sink linear LED drivers for backlighting the main LCD displays or keypads in mobile electronics.

With high peak efficiency 92%, the FAN5622/24/26 feature a low drop out voltage of 50 mV and can drive LEDs without an inductor or flyback capacitors. The brightness levels of the LED outputs are programmed through a single-wire control interface. The user can program 32 linear dimming steps and turn on and off the LEDs through this interface by applying digital pulses.

Additional features include a wide input voltage range (2.7 to 5.5V), short-circuit, under-voltage and thermal protection and less than 1µA shut-down current.
Fairchild claims The FAN5624, available in micro-MLP packaging (1.4 x 1.8mm), is nearly 60 percent smaller than competing solutions, while the FAN5626, packaged in the 1.6 x 2.1mm MicroPAK MLP, is nearly 20 percent smaller.

Price:
The FAN5622 is priced at US$0.47 for 1K pieces.
The FAN5624 is priced at US$0.55 for 1K pieces.
The FAN5626 is priced at US$0.63 for 1K pieces.

Availability: Samples available now