A6266: Automotive High Current LED Controller

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 This classification indicates that the product is obsolete and notice has been given.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: A6271KLPTR-T-1

The A6266 is a boost converter controller, providing a programmable constant current output for driving high power LEDs in series. Driving the LEDs in series ensures identical currents and uniform brightness. For automotive applications, optimum performance is achieved when driving up to 15 LEDs at currents up to 1 A.

The A6266 provides a cost-effective solution using an external logic-level MOSFET and minimum additional external components. The maximum LED current is set with a single external sense resistor and can be modified using a current reference input. Direct PWM control is possible via the Enable input, which also provides a shutdown mode.

Integrated diagnostics and two fault outputs give indication of undervoltage, chip overtemperature, output open circuit, LED short circuit and LED undercurrent, and can be configured to provide short to supply and short to ground protection for the LED connections. A unique feature is the ability to detect one or more shorted LEDs.

The device is provided in a 16-pin TSSOP package with exposed thermal pad (suffix LP). It is lead (Pb) free, with 100% matte tin leadframe plating.

Applications

  • Automotive high power LED lighting systems
  • Fog lights, reversing lights, daytime running lights
  • Headlights

Related Parts

Top Features

  • AEC-Q100 Grade 0 automotive qualified
  • Constant current LED drive
  • 5 to 50 V supply
  • Boost mode
  • Drives up to 15 LEDs in series
  • Programmable switching frequency 100 to 700 kHz
  • Open LED overvoltage indication and protection
  • Single and multiple LED short indication
  • LED short to ground and supply protection
  • PWM dimming control

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A6266KLPTR-T 16-lead TSSOP -40°C to 125°C Yes View Data 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

The device is provided in a 16-pin TSSOP package with exposed thermal pad (suffix LP). It is lead (Pb) free, with 100% matte tin leadframe plating.

Package

Design Support Tools