General Description

The AP3154A is a high efficiency charge-pump white LED driver with 1x, 1.5x, 2x operating modes. The AP3154A operates on power supplies from 2.7v to 5.5v. It drives up to four channels of white LEDs while the intensity of each channel is configured by varying the respective current levels. Each channel can supply up to 30mA current. Up to four channels can be ganged together to provide maximum load current of 120mA. By default, all 4 channels are set to the minimum current level after the chip is enabled or back from shutdown mode.

Features

• Up to 88 Max power efficiency

• Wide input voltage range: 2.7V ~ 5.5V

• 1x, 1.5x, and 2x charge-pump modes

• Drive up to 4 white LEDs

• Default maximum current setting: 20mA each channel

• 120mA maximum output current through 4 channels

• Programmable switching frequency, default 1.2MHz

• Spread Spectrum Control with 10 frequency deviation

• 1-wire Serial Digital Interface (SDI) or PWM for dimming control

• Soft-start during power-up and mode switching

• Soft-stop during shutdown

• Short-circuit protection

• Over-voltage protection and under-voltage lockout

• Low shutdown current < 6µA

• Industry-leading low profile package

• Lead Free package: DFN3030-12

• DFN3030-12: Available in “Green” Molding Compound (No Br, Sb)

• Lead Free Finish / RoHS Compliant (Note 1)

Applications

• Mobile Phone

• PDA (Personal Digital Assistant)

• White LED Backlighting

• Camera Flash LED Lighting

• LCD Modules

• Portable Devices