描述 Description

The MP4012 is a current mode controller designed for driving the high brightness Light Emitting Diodes (LEDs) from extremely wide input voltage 8V-55V. It can be used in Boost, Buck, Buck-boost and SEPIC topologies.?The MP4012 drives external MOSFET with fixed frequency/constant off-time architecture to regulate the LED current, which is measured through an external current sense resistor. Its feedback voltage can be adjusted by the external DC bias voltage. The MP4012 can work in constant frequency operation mode or constant off time mode. It features programmable slop compensation that can optimize the control loop regulation and avoid sub harmonic oscillation.?The MP4012 implements high frequency PWM Dimming with external disconnect MOSFET. It achieves analog dimming by adjusting the feedback voltage. The MP4012 has synchronizing function, which makes multiple ICs synchronized to each other by connecting SYNC pins together.?The MP4012 includes under-voltage lockout, over voltage protection, open and short hiccup mode protection, overload protection and thermal protection to prevent damage in the case of fault condition.?The MP4012 is available in a 16-pin SOIC package.

特性 Features

● Constant-current WLED Driver
● 8V-55V Input Voltage
● Constant Frequency Mode Or Constant Off Time Mode
● Programmable Switching Frequency or Off-Time
● Leading Edge Blanking for Current Sense
● High Frequency PWM Dimming and Analog Dimming
● Output-to-Input Disconnect in Shutdown Mode
● Synchronization Function
● Programmable Over Voltage Protection
● Open Load Hiccup Mode Protection
● Short Load Hiccup Mode Protection
● Programmable Current Limit
● UVLO, Thermal Shutdown
● Soft Start
● Available in 16-pin SOIC package

簡介

MP4012屬于集成電路（IC）的LED驅(qū)動器。由制造生產(chǎn)的MP4012LED 驅(qū)動器器件屬于 LED 驅(qū)動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進(jìn)行外部控制，可在照明應(yīng)用中用于實現(xiàn)調(diào)光功能。