A6269: Automotive LED Array Driver

Description

These parts are in production but have been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available.

Date of status change: July 1, 2019.

Deadline for receipt of LAST TIME BUY orders: December 27, 2019.

Recommended Substitutions: A6261KLJTR-T, A6262KLPTR-T, A6262KLYTR-T.

The A6269 is a linear, programmable current regulator providing up to 200 mA from each of two outputs to drive arrays of high brightness LEDs. The regulated LED current from each output, accurate to 5%, is set by a single reference resistor. Current matching in each string is better than 10% without the use of ballast resistors. Driving LEDs with constant current ensures safe operation with maximum possible light output.

Output control is provided by an enable input, giving direct control for PWM applications, and by a debounced switch input, proving an on/off toggle action.

Optimum performance is achieved driving 1 to 3 LEDs in each string: up to 2 strings at 200 mA each. Outputs can be connected in parallel or left unused as required.

Short detection is provided to protect the LEDs and the A6269 during a short-to-ground at any LED output pin. The output will automatically resume the regulated current when the short is removed.

A temperature monitor is included to reduce the LED drive current if the chip temperature exceeds an adjustable thermal threshold.

The device package is an 8-pin SOICN (LJ) with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.

Applications

  • Dome light, map light, space lighting, mood lighting

Top Features

  • AEC-Q100 qualified
  • Total LED drive current up to 400 mA
  • Current shared equally up to 200 mA by 2 strings
  • 6 to 50 V supply
  • Low dropout voltage
  • LED output short-to-ground and thermal protection
  • On/off toggle switch input
  • Enable input for PWM control
  • Current slew rate limit during PWM
  • Current set by reference resistor
  • Automotive K-temperature range (–40°C to 150°C)

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A6269KLJTR-T 8-lead SOIC -40°C to 125°C Yes View Data Last time buy Contact your
local sales rep
Check
Distributor Stock
APEK6269KLJ-01-MH DEMO BOARD -40°C to 125°C No -- Last time buy 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.

Packaging

Package