Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver


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The A8513 is a single-output white LED (WLED) driver for LCD backlighting. It integrates a current-mode boost converter with an internal power switch and one current sink. The A8513 can operate from a single power supply from 4.5 to 40 V, to accommodate start/stop, cold crank, and load dump requirements. A 2 MHz boost converter switching frequency allows the A8513 to operate above the AM radio band.

If required, the fault flag can be used as part of a circuit to drive an external P-FET to disconnect the input supply from the system in the event of a fault. The A8513 provides protection against output short and overvoltage, open or shorted diode, open or shorted LED pin, shorted boost switch or inductor, shorted ISET resistor, and IC overtemperature. A dual level cycle-bycycle current limit function provides soft start and protects the internal current switch against high current overloads.

The A8513 is provided in a 10-pin MSOP package (suffix LY). This package has an exposed thermal pad for enhanced thermal dissipation, and is lead (Pb) free, with 100% matte tin leadframe plating.


LCD backlighting for:

  • Automotive infotainment
  • Automotive cluster
  • Automotive center stack
  • Industrial LCD displays
  • Portable DVD players
  • Flatbed Scanners
  • LED Lighting
  • AEC-Q100 Qualified
  • Wide input voltage range of 4.5 to 40 V for start/stop, cold crank and load dump requirements
  • Boost converter switching frequency up to 2 MHz, allowing operation above the AM band
  • Excellent input voltage transient response
  • Internal secondary OVP for redundant protection
  • Fully integrated LED current sink and boost converter with 60 V DMOS FET
  • Maximum LED current of 150 mA
  • Drives up to 14 series LEDs
  • Single EN/PWM pin interface for PWM Dimming and Enable function
  • 5000:1 PWM dimming at 200 Hz
  • Fault flag pin to alert the controller to a myriad of possible fault conditions
  • Protection Features:
    • Shorted output
    • Open or shorted LED pin
    • Output undervoltage and overvoltage
    • Input undervoltage
    • Shorted boost switch or inductor
    • Shorted ISET resistor
    • Open boost Schottky
    • Overtemperature

10-pin MSOP with exposed thermal pad (LY package)

Part Number Specifications and Availability