General Description

The APW7001 is a high efficiency charge pump white LED driver; the device drives up to four white LEDs in the main display and up to two white LEDs in the sub-display with regulated constant current for uniform intensity. The supply voltage ranges from 2.7V to 5.5V and it is optimized for a Li-ion battery application.

Features

• ±1.5 LED Current Matching

• Powers Main and Sub-Display LEDs

• High Efficiency Up to 90 Over Li-ion Battery Discharge

• Output Current Up to 30mA per LED

• 2.7V to 5.5V Operating Voltage

• 1x/1.5x/2x Charge Pump Modes

• Low Shutdown Current: 2mA Maximum

• Low Input Ripple and EMI

• Internal Soft-Start Limits Inrush Current

• Short Circuit Current Limit

• Thermal Shutdown Protection

• Output Over-Voltage Protection

• 16-pin QFN Package

• Lead Free and Green Devices Available (RoHS Compliant)

Applications

• Cellular Phone White LED Back Light

• Portable Device

• PDA, Handheld Computer

• DSC