描述 Description

The MP1519 is a fully automatic driver for powering four white LEDs, with up to 4V forward voltage, from a single Li-Ion or three NiMH cells. The driver performs all of the sensing and control to run the LEDs at an optimum charge pump ratio for efficiency without an expensive inductor. The driver allows PWM operation to support brightness control. The tiny 3mm x 3mm QFN16 package and small external capacitors allow for the most compact white LED solution available.

特性 Features

● 2% LED Current Matching
● High Efficiency (>93%)
● Current Source Outputs
● No Ballast Resistors Required
● 1x, 1.5x and 2x Automatic Modes
● Constant Frequency Operation
● Automatic LED Detection
● High and Low Frequency PWM Capability
● 2.5V to 5.5V Operation
● Less than 1? Leakage during Shutdown
● Detects Changes in Battery Level
● No External Schottky Diode Required
● Soft-Start and Soft Switching Operation

簡(jiǎn)介

MP1519屬于集成電路（IC）的LED驅(qū)動(dòng)器。由制造生產(chǎn)的MP1519LED 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?？蓪?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。