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A6263 Protected LED Array Driver

Allegro MicroSystems

A6263-1 : Protected LED Array Driver

The A6263 is a linear, programmable current regulator providing up to 100 mA from each of 4 outputs to drive arrays of high brightness LEDs. Outputs can be connected in parallel or left unused, as required. 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.
The IC provides protection against the following common faults:
• LED string shorted to GND
• Single or multiple LED short
• LED string open
• IC pin open/short
• Overtemperature
If one LED string is open or shorted to ground, the offending string is disabled, while other LED strings continue to work.
A temperature monitor is included to reduce the LED drive current if the chip temperature exceeds a thermal threshold. If necessary, this thermal derating threshold can be adjusted or disabled.
The device comes in an 8-pin SOIC ( package LJ ) with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.

Product Number: A6263

Class: Integrated Circuits(ICs), Power Management(PMIC), LED Drivers

Tag: LED Drivers, Protected LED Array Driver

AEC-Q100 qualified
Total LED drive current up to 400 mA
Current shared equally up to 100 mA by up to 4 strings
Wide input voltage range of 6 to 50 V for start/stop, cold crank, and load dump requirements
Low dropout voltage
LED current levels set by single reference resistor
LED string shorted to GND protection
Overtemperature protection with optional thermal derating function
Automotive temperature range

Applications :
Automotive interior and exterior lighting

Part Number Type Output Current Topology Mounting Style Operating Frequency Dimming Applications Maximum Frequency Operating Temperature Voltage - Supply Package Type
A6263 DC DC Regulato 400 mA Step-Down (Buck) Surface Mount - PWM Automotive 2 kHz -40 °C ~ 125 °C(TA) 6V ~ 50V 8-SOIC (0.154, 3.90mm Width) Exposed Pad

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    Datasheet Download on Jun, 2022

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