MIC3202-1中文资料37V/ 1A HBLED Driver with High-Side Current Sense数据手册Microchip规格书

描述 Description

The MIC3202 is a hysteretic, step-down, constant-current, High-Brightness LED (HB LED) driver. It provides an ideal solution for interior/exterior lighting, architectural and ambient lighting, LED bulbs, and other general illumination applications.The MIC3202 is well suited for lighting applications requiring a wide-input voltage range. The hysteretic control gives good supply rejection and fast response during load transients and PWM dimming. The high-side current sensing and on-chip current-sense amplifier delivers LED current with ±5% accuracy. An external high-side current-sense resistor is used to set the output current.The MIC3202 offers a dedicated PWM input (DIM) which enables a wide range of pulsed dimming. High-frequency switching operation of up to 1MHz allows the use of smaller external components, minimizing space and cost. The MIC3202 offers a frequency dither feature for low-EMI applications.The MIC3202 operates over a junction temperature from -40°C to +125°C and is available in an 8-pin e-Pad SOIC package.A dither disabled version MIC3202-1 is also available in the same package as the MIC3202.

特性 Features

• 6V to 37V input voltage range
• ±5% LED current accuracy
• MIC3202-1: Dither disabled
• Dedicated dimming control input
• Up to 1MHz switching frequency
• Over-temperature protection
• -40°C to +125°C junction temperature range

简介

MIC3202-1属于集成电路（IC）的LED驱动器。由制造生产的MIC3202-1LED 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。