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AS3687 Datasheet Flexible Lighting Management

Manufacturer: austriamicrosystems

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Datasheet Details

Part number AS3687
Manufacturer austriamicrosystems
File Size 1.40 MB
Description Flexible Lighting Management
Datasheet AS3687-austriamicrosystems.pdf

General Description

The AS3687/87XM is a highly-integrated CMOS Lighting Management Unit for mobile telephones, and other 1-cell Li+ or 3-cell NiMH powered devices.

The AS3687/87XM incorporates one Step Up DC/DC Converter for white backlight LEDs, one low noise Charge Pump for indicator- or RGB- LEDs, LED test circuit (production test of the soldered LEDs at the customer site), one Analog-to-Digital Converter, seven current sinks, a two wire serial interface, and control logic all onto a single device.

Output voltages and output currents are fully programmable.

Key Features

  • High-Efficiency Step Up DC/DC Converter.
  • Up to 25V/50mA for White LEDs.
  • Programmable Output Voltage with External Resistors and Serial Interface.
  • Overvoltage Protection.
  • High-Efficiency Low Noise 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 150mA.
  • Efficiency up to 95%.
  • Only 4 External Capacitors Required: 2 x 500nF Flying Capacito.

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AS3687 Distributor