A8513: Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver

Description

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.

Applications

LCD backlighting for:

  • Automotive infotainment
  • Automotive cluster
  • Automotive center stack
  • Industrial LCD displays
  • Portable DVD players
  • Flatbed Scanners
  • LED Lighting

Top Features

  • 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

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
APEK8513KLY-01-MH DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Check
Distributor Stock
A8513KLYTR-1-T 10-lead MSOP -40°C to 125°C Yes View Data Contact factory Contact your
local sales rep
Check
Distributor Stock
A8513KLYTR-2-T 10-lead MSOP -40°C to 125°C Yes View Data Contact factory Contact your
local sales rep
Check
Distributor Stock
A8513KLYTR-3-T 10-lead MSOP -40°C to 125°C Yes View Data Contact factory Contact your
local sales rep
Check
Distributor Stock
A8513KLYTR-T 10-lead MSOP -40°C to 125°C Yes View Data Contact your
local sales rep
Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

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