MP3304B数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The MP3304 is a monolithic step-up converter designed for driving arrays of WLEDs from 5V input or a single cell Lithium Ion battery. The MP3304 uses current mode, fixed frequency architecture to regulate the LED current, which is measured through an external current sense resistor. Its low 200mV feedback voltage reduces power loss and improves efficiency. The MP3304 features up to 50kHz true PWM dimming, which allows the flexible control of the backlighting luminance under wide range of the ambient brightness, and also avoids the possibility of PWM dimming audible noise. The MP3304 is turned off if an over-voltage condition is present due to an open circuit condition. MP3304 also includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload. The MP3304 is available in small 8-pin QFN 2x3mm package.

特性 Features

●Internal Power MOSFET
●Drives up to 10 Series White LEDs
●Up to 88% Efficiency
●PWM Dimming Frequency from 250Hz to 50kHz
●2.2MHz Fixed Switching Frequency
●Open Load Shutdown
●Low 200mV Feedback Voltage
●UVLO, Thermal Shutdown
●Internal 1.3A Current Limit
●Available in 2x3mm QFN8 Package

简介

MP3304B属于集成电路（IC）的LED驱动器。由制造生产的MP3304BLED 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。