AP8800A中文資料medium-voltage-dc-dc-led-drivers數(shù)據(jù)手冊Diodes規(guī)格書

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

應(yīng)用 Application

MR16 lamps
General illumination lamps
1-W LED driver

簡介

AP8800A屬于集成電路（IC）的LED驅(qū)動(dòng)器。由Diodes制造生產(chǎn)的AP8800ALED 驅(qū)動(dòng)器器件屬于 LED 驅(qū)動(dòng)器電源管理集成電路 (PMIC) 系列，可通過標(biāo)稱固定電壓的電源為負(fù)載（通常為發(fā)光二極管）提供電流，并且電流可控。它與用于電壓調(diào)節(jié)的類似產(chǎn)品的主要區(qū)別在于，這類器件提供較低的反饋電壓（以提高系統(tǒng)能效），而且通常可對器件工作點(diǎn)進(jìn)行外部控制，可在照明應(yīng)用中用于實(shí)現(xiàn)調(diào)光功能。