MIC2289C数据手册集成电路（IC）的LED驱动器规格书PDF

描述 Description

The MIC2289C is a pulse-width modulated (PWM), boost-switching regulator that is optimized for constant-current white LED driver applications. The MIC2289C features an internal Schottky diode and three levels of output overvoltage protection providing a small size and efficient DC/DC solution that requires only four external components.To optimize efficiency, the feedback voltage is set to only 95mV. This reduces power dissipation in the current set resistor and allows the lowest total output voltage, hence minimal current draw from the battery.The MIC2289C implements a constant frequency 1.2MHz PWM control scheme. The high frequency, PWM operation saves board space by reducing external component sizes. The added benefit of the constant frequency PWM scheme in caparison to variable frequency in much lower noise and input ripple injected to the input power source.The MIC2289C clamps the output voltage in case of open LED conditions, protecting itself and the output capacitor. The MIC2289C is available with an output OVP option of 34V.The MIC2289C is available in low profile 6-pin Thin SOT-23 package. The MIC2289C has a junction temperature range of -40°C to +125°C.

特性 Features

• 2.5V to 10V input voltage
• Output voltage up to 34V with OVP
• Internal Schottky diode
• Over 500mA switch current
• 1.2MHz PWM operation
• 95mV feedback voltage
• <1% line and load regulation
• <1µA shutdown current
• Over-temperature protection
• UVLO
• Thin SOT-23 6-pin package
• -40°C to +125°C junction temperature range
• For higher performance specifications see the MIC2289

简介

MIC2289C属于集成电路（IC）的LED驱动器。由制造生产的MIC2289CLED 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。