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APW7001

ANPEC
Part Number APW7001
Manufacturer ANPEC
Description 1X/1.5X/2X Charge Pump White LED Driver
Published Jun 22, 2016
Detailed Description APW7001 1X/1.5X/2X Charge Pump White LED Driver for Main and Sub-Displays Features • ±1.5% LED Current Matching • Power...
Datasheet PDF File APW7001 PDF File

APW7001
APW7001

Overview
APW7001 1X/1.
5X/2X Charge Pump White LED Driver for Main and Sub-Displays 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 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.
The APW7001 operates in 1x, 1.
5x, and 2x charge pump modes and automatically switches the charge pump modes depend on the input voltage to maintain the required power for high power efficiency.
The APW7001 provides up to 30mA per LED and allows several methods such as the PWM signals on the ENM pin for main-display dimming and on the ENS pin for sub-display dimming.
The two control logic pins, ENM and ENS, allow disabling or enabling the main and sub-displays.
The supply current is only 2mA in 2x mode, and the ENM and ENS are kept low for 20ms will allow the device to enter shutdown mode with 2µA quiescent current.
The APW7001 features current limit and short circuit protection.
The APW7001 switches at 1MHz frequency and only requires four 1µF ceramic capacitors and one resistor, and ensures low input current ripple and EMI.
The APW7001 is available in a 16-pin QFN package.
Pin Configuration ILED 4 ILED 3 ILED 2 ILED 1 16 15 14 13 ILED 5 1 ILED 6 2 ENM 3 ENS...


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