MIC2298数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The MIC2298 is a high power boost-switching regulator that is optimized for constant-current control. The MIC2298 is capable of driving up to two series 1A white LED for photoflash, flashlight and other applications. The feedback voltage is only 200mV, minimizing ballast power dissipa-tion in constant-current control applications for improved operating efficiency.The MIC2298 has a brightness pin that allows for a programmable torch mode as well full flash with a single pin when driving high current LEDs.The MIC2298 implements a constant frequency 1MHz PWM control scheme to make the smallest possible design.The 2.5V to 10V input voltage range of MIC2298 allows direct operation from 1- and 2-cell Li-Ion as well as 3- to 6-cell NiCad/NiMH/Alkaline battery sources. Maximum battery life is assured with a low 1µA shutdown current.

特性 Features

• 3.5A minimum switch current delivers at least 7W of output power over temperature
• 200mV ±10% feedback voltage
• 2.5V to 10V input voltage
• Output voltage up to 30V (max)
• Output over voltage protection (OVP)
• 1MHz operation
• Programmable output current
• <1% line regulation
• 1µA shutdown current
• Over-temperature protection
• Externally programmable soft-start
• Under voltage lockout (UVLO)
• -40°C to +125°C junction temperature range

简介

MIC2298属于集成电路（IC）的LED驱动器。由制造生产的MIC2298LED 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。