FAN5622SX

The FAN5622, FAN5624, and FAN5626 are two-, four-, and six-channel current-sink linear LED drivers used to backlight the main LCD displays or keypads in mobile electronics, such as cellular phone handsets. A very low dropout of 50 mV allows driving LEDs without any inductors or switch capacitors. The brightness levels of the LED outputs are programmed through single-wire digital control interface. The user can program 32 linear dimming steps and turn on and off the LEDs through this interface by applying digital pulses. The FAN562x family of linear LED drivers provides high efficiency due to the low drop-out voltage of the LED driver. Good matching between different channels of LED output is provided across the entire 32 dimming steps. These LED drivers also integrate short circuit, under-voltage, and thermal protection to ensure for a more robust solution. The FAN5622, FAN5624, and FAN5626 are available in very small form-factor packages: 6-pin Super SOT23, 10-lead UMLP, and 10-lead MicroPak MLP, respectively.

Applications

• Mobile Handsets
• Mobile Internet Devices
• PMP and MP3 Players
• LCD Modules

Key features

• Family of Three Linear Current-Sink LED Drivers that Support 2, 4, or 6 LED Outputs
• Current Sink Driver for Each LED Output: -30 mA Maximum Output Current -50 mv Drop-out at 15 mA IOUT – Better than 3% Matching between Channels – External RSET Single-Wire Digital Control Interface for Easy Programming – 32 Linear Steps of Dimming Control
• Less than 1 μA Shutdown Current
• Short-Circuit, Under-Voltage, and Thermal Protection
• Wide Input Voltage Range: 2.7 to 5.5 V
• Small Form-Factor Packages: – FAN5622: 6-Pin Super SOT23 – FAN5624: 10-Lead 1.4×1.8×0.55 mm UMLP – FAN5626: 10-Lead 1.6×2.1×0.55 mm MicroPak MLP