MIC2870中文资料1.5A Synchronous Boost Flash LED Driver数据手册Microchip规格书

描述 Description

The MIC2870 is a high-current, high-efficiency flash LED driver for one or two high-brightness camera flash LEDs.The LED driver current is generated by an integrated inductive boost converter with 2MHz switching frequency which allows the use of a very-small inductor and output capacitor. These features make the MIC2870 an ideal solution for high-resolution camera phone LED flashlight driver applications.MIC2870 supports two 750mA white-LEDs (WLEDs) or a single 1.5A WLED configuration. When two WLEDs are connected, their currents are matched automatically.MIC2870 operates in either flash or torch modes that can be controlled through either an I2C interface or external pins. The brightness in the flash and torch mode can be adjusted via two external resistors individually. High-speed mode I2C interface provides a simple control at a clock speed up to 3.4MHz to support most camera functions such as auto-focus, white balance, and image capture (flash mode).The MIC2870 is available in 16-pin, 2mm × 2mm TQFN package with a junction temperature range of −40°C to +125°C.

特性 Features

• Up to 1.5A flash LED driving current with a 2.7V to 5.0V input voltage range
• High-efficiency 2MHz VFadaptive boost driver
• Configurable 1 or 2 channel(s) WLED driver
• LED driving current soft-start
• Control through I2C interface or external pins
• Flash inhibit function for GSM pulse synchronization
• True load disconnect
• Flash time-out protection
• 1µA shutdown current
• Available in 16-pin 2mm × 2mm TQFN package

简介

MIC2870属于集成电路（IC）的LED驱动器。由制造生产的MIC2870LED 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。