MIC2299中文资料3.5A Minimum, 2MHz Boost, High Brightness White LED Driver数据手册Microchip规格书

描述 Description

The MIC2299 is a high power boost-switching regulator that is optimized for constant-current control. The MIC2299 is capable of driving up to two series 1A white LED for photoflash and other applications. The feedback voltage is only 200mV, minimizing power dissipation in constant-current control applications, and hence extends battery life.The MIC2299 has a brightness pin that allows for a programmable torch mode as well as full flash with a single pin when driving high current LEDs.The MIC2299 implements a constant frequency 2MHz PWM control scheme to make the smallest possible design. The MIC2299's 2MHz operation avoids signal interference in the AM band.The 2.5V to 10V input voltage range of MIC2299 allows direct operation from 1- and 2-cell Li-Ion as well as 3- to 4-cell NiCad/ NiMH/ Alkaline or lithium batteries . Maximum battery life is assured with a low 1µA shutdown current.

特性 Features

• Programmable current control
• 200mV ±10% feedback voltage
• 2.5V to 10V input voltage
• Output over voltage protection (OVP)
• Output voltage up to 30V (max)
• Fixed 2.0MHz Operation
• Guaranteed 3.5A switch current over-temperature
• Solution size of just 0.25in² (1.6cm²)
• Output power range of 7W to 12W
• <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

MIC2299属于集成电路（IC）的LED驱动器。由制造生产的MIC2299LED 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。