A6262中文资料Automotive LED Array Driver数据手册Allegro规格书

描述 Description

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.

Related Products

A6261 Protected LED Array Driver A6264 Automotive Stop/Tail LED Array Driver

特性 Features

• Total LED drive current up to 400 mA
• 6 to 50 V supply
• LED output short-to-ground and thermal protection
• Enable input for PWM control
• Current set by reference resistor
• Automotive K-temperature range (–40°C to 150°C)

简介

A6262属于集成电路（IC）的LED驱动器。由制造生产的A6262LED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。