Fairchild LED Driver Offers 32 Dimming Steps for Greater Brightness Control in Portable Designs
Fairchild Semiconductor introduced the FAN5341; an LED driver solution that is said to improve brightness and resolution in portable designs, while offering 32 linear dimming steps and driving up to five white LEDs in series. By driving the LEDs in series this device ensures that all the LEDs used in applications such as mobile handsets, digital still cameras, GPS devices, MP3 players and other applications using small LCD displays have equal brightness.
This boost LED driver operates at 1.2MHz switching frequency, and integrates a Schottky diode to minimize the size of the external passive components and overall board space. With the FAN5341’s simple single-wire interface, a designer can easily control the brightness levels of the LEDs by transmitting digital pulses from the microcontroller to the FAN5341. And since this lighting solution drives three to five LEDs in a series, the same current flows through each LED to ensure equal brightness. This LED driver also addresses space and power considerations in portable designs since it offers up to 83% efficiency, minimizing power consumption. The FAN5341 is assembled in a compact, low profile 2 x 2mm UMLP package.
The FAN5341 is priced (each 1,000pcs) at $0.72 with a delivery of 12 weeks ARO.