ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)

AS3642 LED-flash Driver

500mA single LED-flash driver

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The AS3642 is an inductive high efficient DCDC step up converter driving a current source. The DCDC step up converter operates at a fixed frequency of 4MHz and includes soft startup to allow easy integration into noise sensitive RF systems. The AS3642 includes flash timer, overvoltage, overtemperature, undervoltage and LED short circuit protection functions.

Key Features

  • 4MHz fixed frequency DCDC
  • Small chip-scale package
  • Overvoltage, overtemperature, undervoltage and LED short circuit protection functions

Key Benefits

  • Tiny external coils
  • Small system size
  • High system safety

Product Facts

Topology Inductive
DC-DC frequ. [MHz] 4
Performance [ILed max] 500mA
- [Vout max] 5.5
LED channels [Curr. sinks] 1
- [Curr. source] high-side
- [Flash LEDs] 1
- [Indicator LED] Flash LED
Interfaces [I²C]
- [Enable]
Safety features [TimeOut]
- [TXMask]
Package WL-CSP6 (1.5x1.1)-0.5p

Additional Information


Smallest size LED flash solution for mobile phones