APW7001 - ANPEC

APW7001 1X/1.5X/2X Charge Pump White LED Driver

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. The APW7001 operates in 1x, 1.5x, and 2x.

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: 2µA 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 .