描述 Description

The MP4008 is a current-mode controller designed for driving high brightness light emitting diodes (LEDs) with a wide input voltage from 9V to 28V. It can be used in boost and SEPIC topologies.
The MP4008 drives an external MOSFET with a fixed frequency architecture to regulate the LED current, which is measured through an external current-sense resistor. The LED current feedback voltage is 280mV. The switching frequency is fixed to 180kHz. The cycle-by-cycle current limit can be programmed by the sense resistor on CS.
The MP4008 employs fast PWM dimming to the LED current with a high dimming ratio.
Integrated protection features include under-voltage lockout, over-voltage protection, over-current protection, short LED protection, short output protection, short inductor/diode protection, and OTP.
The MP4008 is available in a SOIC-8 package.

特性 Features

●Constant Current WLED Driver
●280mV Feedback Voltage with ?.8% Accuracy
●9V to 28V Input Voltage
●Leading Edge Blanking for Current Sense
●Frequency Fixed to 180kHz
●Fast PWM Dimming
●Soft Start
●Over-Voltage Protection
●Short LED Protection
●Short Output Protection
●Over-Current Protection
●Short Inductor/Diode Protection
●VIN UVLO
●Thermal Shutdown
●Available in a SOIC-8 Package

簡(jiǎn)介

MP4008屬于集成電路（IC）的LED驅(qū)動(dòng)器。由制造生產(chǎn)的MP4008LED 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(guò)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(duì)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。