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A6262

Allegro MicroSystems
Part Number A6262
Manufacturer Allegro MicroSystems
Description Automotive LED Array Driver
Published Dec 5, 2011
Detailed Description FEATURES AND BENEFITS ▪ AEC-Q100 qualified ▪ Total LED drive current up to 400 mA ▪ Current shared equally up to 100 mA ...
Datasheet PDF File A6262 PDF File

A6262
A6262


Overview
FEATURES AND BENEFITS ▪ AEC-Q100 qualified ▪ Total LED drive current up to 400 mA ▪ Current shared equally up to 100 mA by 4 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 temperature range APPLICATIONS: ▪ Dome light, map light, space lighting, mood lighting PACKAGES: 10-pin MSOP with exposed thermal pad (suffix LY) 16-pin TSSOP with exposed thermal pad (suffix LP) A6262 Automotive LED Array Driver DESCRIPTION TheA6262 is a linear, programmable current regulator providing up to 100 mA from each of four 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 4 strings at 100 mA each.
Outputs can be connected in parallel or left unused as required.
Short detection is provided to protect the LEDs and the A6262 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 packages are a 10-pin MSOP (suffix LY), and a 16-pin TSSOP (LP), both with exposed pad for enhanced thermal dissipation.
They are lead (Pb) free, with 100% matte tin leadframe plating.
A6262-DS, Rev.
10 MCO-0000875 Not to scale Typical Application Diagram + Automotive 12 V power net VIN PWM dimm...


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