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onsemi / Fairchild FAN5646 Programmable Indicator Soft LED Blinker

onsemi / Fairchild FAN5646 programmable indicator soft LED blinker is a flexible and compact solution with TinyWire™ single-wire interface. The internal programmable blink algorithm eliminates the need for continual system processor control that provides longer battery life for a hand-held system. The onsemi / Fairchild FAN5646 LED blinker also features a follow or repeat pattern mode for blinking when the applications processor is powered down. This LED blinker features blink rate, rise and fall time, and CTRL line behavior that can be programmed by the TinyWire single-wire digital interface.

Features

  • Logarithmic fade up and fade down for power savings
  • Follow or repeat pattern mode for blinking when the applications processor is powered down
  • Default pattern optionally modified using TinyWire single-wire digital control for
    • LED current rise/fall time
    • tON and tOFF for up to two pulses
  • High-side constant current LED driver
    • 20mA maximum output current
    • 80mV drop-out at 20mA IOUT
    • External RSET (SC70 only) or internal current programming
  • 35µA operating quiescent current
  • Short-circuit, under-voltage, and thermal protection
  • 2.7V to 5.5V wide input range
  • 4-bump WLCSP, 0.4mm pitch

Applications

  • Cell phone
  • Pocket PCs and digital cameras
  • Bluetooth® headsets PMP and MP3 players

Typical Application Circuit Diagram

Application Circuit Diagram - onsemi / Fairchild FAN5646 Programmable Indicator Soft LED Blinker

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Veröffentlichungsdatum: 2009-12-04 | Aktualisiert: 2022-07-14