MIC2293中文资料2MHz White LED Driver w/15V OVP数据手册Microchip规格书

描述 Description

The MIC2292 and MIC2293 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 MIC2292/93 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 MIC2292/3 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 (MIC2292)
• 2.0MHz PWM operation (MIC2293)
• 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

简介

MIC2293属于集成电路（IC）的LED驱动器。由制造生产的MIC2293LED 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。