AP8800A中文资料medium-voltage-dc-dc-led-drivers数据手册Diodes规格书

描述 Description

The AP8800A is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 7 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 8V to 28V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AP8800A switches at frequency up to 600kHz. This allows the use of small size external components, hence minimizing the PCB area needed. Maximum output current of AP8800A is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.2V or lower at CTRL switches off the output MOSFET simplifying PWM dimming.

特性 Features

LED driving current up to 370mA
Better than 5% accuracy
High efficiency up to 95%
Operating input voltage from 8V to 28V
Simple, versatile solution requiring only 4 components
PWM/DC input for dimming control
Built-in output open-circuit protection
TSOT25: Available in “Green” Molding Compound (No Br, Sb) with lead Free Finish/ RoHS Compliant

应用 Application

MR16 lamps
General illumination lamps
1-W LED driver

简介

AP8800A属于集成电路（IC）的LED驱动器。由Diodes制造生产的AP8800ALED 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。