• Part: AS3687
  • Manufacturer: austriamicrosystems
  • Size: 1.40 MB
Download AS3687 Datasheet PDF
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AS3687 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 Capacitors, 2 x 1µF Input/Output Capacitors

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AS3687 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...