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AS3676 - Flexible Lighting Management

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.

Features

  • High-Efficiency Step Up DC/DC Converter - Up to 26V/50mA for White LEDs - Programmable Output Voltage with External Resis- tors and Serial Interface - 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 mode can be blocked) - 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: 2 x 1µF Flying Capa.

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Datasheet preview – AS3676

Datasheet Details

Part number AS3676
Manufacturer austriamicrosystems
File Size 2.15 MB
Description Flexible Lighting Management
Datasheet download datasheet AS3676 Datasheet
Additional preview pages of the AS3676 datasheet.

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Full PDF Text Transcription

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Technical coantmesntAsGtill valid Datasheet AS3676 Flexible Lighting Management (CP, DCDC, 13 Current Sinks, ADC, LED Test, LDO, DLS and Ambient Light sensing) 1 General 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 supports ambient light sensor processing and a Dynamic Luminance Scaling (DLS) input. Output voltages and output currents are fully programmable.
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