AS3676 Description
The AS3676 is a highly-integrated CMOS Power and Lighting Management Unit for mobile telephones, and other 1-cell Li+ or 3-cell NiMH powered devices. The AS3676 incorporates one Step Up DC/DC Converter for white backlight LEDs, one high-power Charge Pump, one Analog-to-Digital Converter, 13 current sinks, LED in-circuit function test, a two wire serial interface, and control logic all onto a single device. It...
AS3676 Key Features
- High-Efficiency Step Up DC/DC Converter
- Up to 26V/50mA for White LEDs
- Programmable Output Voltage with External Resis
- Over voltage Protection -High-Efficiency High-Power Charge Pump
- 1:1, 1:1.5, and 1:2 Mode
- Automatic Up Switching (can be disabled and 1:2
- Output Current up to 400mA/500mA pulsed
- Efficiency up to 95%
- Very Low effective Resistance (2.5 typ. in 1:1.5)
- Only 4 External Capacitors Required