The A6262 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 when driving 4 strings with 1 to 3 LEDs in each string, at a total current of up to 100 mA in each string. 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 (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.