MP4425A数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The MP4425A is a high-frequency, synchronous, rectified, step-down, switch-mode white LED driver with built-in power MOSFETs. It offers a very compact solution to achieve 1.5A of continuous output current with excellent load and line regulation over a wide input supply range. The MP4425A has synchronous mode operation to get high efficiency.

Current mode operation provides fast transient response and eases loop stabilization.

Full protection features include over-current protection (OCP) and thermal shutdown (TSD).

The MP4425A requires a minimal number of readily available, standard external components, and is available in a space-saving QFN-13

(2.5mmx3mm) package.

特性 Features

• Wide 4V to 36V Operating Input Range
• 85mΩ/50mΩ Low RDS(ON) Internal Power MOSFETs
• High-Efficiency Synchronous Mode Operation
• Default 2.2MHz Switching Frequency
• PWM Dimming (Min 100Hz Dimming Frequency)
• Forced CCM Mode
• 0.2V Reference Voltage
• Internal Soft Start
• Fault Indication for LED Short, Open, and Thermal Shutdown
• Over-Current Protection (OCP) with Valley- Current Detection
• Thermal Shutdown
• CISPR25 Class 5 Compliant
• Available in a QFN-13 (2.5mmx3mm) Package

简介

MP4425A属于集成电路（IC）的LED驱动器。由制造生产的MP4425ALED 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。