描述 Description

The MIC2292C and MIC2293C are high frequency, pulse-width modulator (PWM) boost regulators optimized for constant-current, white LED driver applications. Because of their constant PWM switching frequencies of 1.6MHz and 2MHz, respectively, the MIC2292/93C can use the smallest external components, allowing designers to avoid sensitive IF bands in their RF applications.The products feature an internal Schottky diode and two levels of output overvoltage protection allowing a small size and efficient DC/DC solution that requires only four external components.The 2.5V to 10V input voltage range of MIC2292/3C allows direct operation from 1- and 2-cell Li-Ion as well as 3- to 4-cell NiCad/NiMH/Alkaline batteries.

特性 Features

? 2.5V to 10V input voltage
? Output voltage up to 34V
? Internal Schottky diode
? 1.6MHz PWM operation (MIC2292C)
? 2.0MHz PWM operation (MIC2293C)
? Stable with ceramic capacitors
? 15V and 34V output overvoltage protection options
? 500mA switch current rating
? 95mV feedback voltage
? <1% line and load regulation
? <1μA shutdown current
? Over-temperature protection
? UVLO
? -40°C to +125°C junction temperature range

簡(jiǎn)介

MIC2293C屬于集成電路（IC）的LED驅(qū)動(dòng)器。由制造生產(chǎn)的MIC2293CLED 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?？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。