onsemi

FAN5343 Series Boost LED Driver

onsemi's FAN5343 features integrated over-voltage, over-current, short circuit detection

Image of Fairchild's FAN5343 Series Boost LED Driveronsemi's FAN5343 is an asynchronous constant-current LED driver capable of efficiently delivering up to 500 mW to a string of six LEDs in series. Optimized for small form factor applications, the 1.2 MHz fixed switching frequency allows the use of small chip inductors and capacitors. The FAN5343 uses a single-wire digital control interface to program the brightness levels of the LEDs in 32 linear steps applying digital pulses.

For safety, the device features integrated overvoltage, overcurrent, short-circuit detection, and thermal shutdown protection. In addition, input undervoltage lockout protection is triggered if the battery voltage is too low.

Features
  • Asynchronous boost converter
    • VOUT up to 24 V
  • Internal Schottky diode
  • Up to 500 mW output power
  • 2.7 V to 5.5 V input voltage range
  • Fixed switching frequency: 1.2 MHz
  • Soft-start capability
  • Input undervoltage lockout (UVLO)
  • Output overvoltage protection (OVP)
  • Short-circuit detection
  • Thermal shutdown protection (TSD)
Published: 2011-01-18

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