AS3675 Description
The AS3675 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 AS3675 incorporates one Step Up DC/DC Converter for white backlight LEDs, one high-power Charge Pump, one Analog-to-Digital Converter, 13 current sinks, the RGB and white LEDs can be controlled by an audio input, LED in-circuit function test, a two wire serial...
AS3675 Key Features
- Up to 16V/55mA (or 25V/35mA) 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 300mA/500mA pulsed
- Efficiency up to 95%
- Very Low effective Resistance (2.5Ω typ. in 1:1.5)
- Only 4 External Capacitors Required
- Supports LCD White Backlight LEDs, or RGB LEDs 13 Current Sinks