BCR421UW6中文资料BCR421U数据手册Diodes规格书

描述 Description

he BCR420U/BCR421U monolithically integrates a transistor, diodes and resistors to function as a Constant Current Regulator (CCR) for linear LED driving. The device regulates with a preset 10mA nominal that can be adjusted with external resistor up to 350mA. It is designed for driving LEDs in strings and will reduce current at increasing temperatures to self-protect. Operating as a series linear CCR for LED string current control, it can be used in multiple applications, as long as the maximum supply voltage to the device < 40V.
With the low-side control, the BCR421U has an Enable (EN) pin which can be pulse-width modulated (PWM) up to 10 kHz by a micro controller for LED dimming.
With no need for additional external components, this CCR is fully integrated into a SOT26 minimizing PCB area and component count.

特性 Features

LED Constant Current Regulator using NPN Emitter-Follower with Emitter Resistor to Current Limit
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\t\tIout = 10mA ± 10% Constant Current (Preset)
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\t\tIout up to 350mA adjustable with an External Resistor
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\t\tVout = 40V Supply Voltage
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\t\tPd up to 1W in SOT26 (SC-74)
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\t\tNegative temperature coefficient (NTC) reduces IOUT with increasing temperature
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\t\tParallel Devices to Increase Regulated Current
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\t\tTotally Lead-Free & Fully RoHS Compliant
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\t\tHalogen and Antimony Free. “Green” Device
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\t\tQualified to AEC-Q101 Standards for High Reliability

应用 Application

Constant Current Regulation (CCR) in:

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\t\tAutomotive Interior Lighting
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\t\tEmergency Lighting
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\t\tSignage, Advertising, Decorative and Architectural Lighting
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\t\tRetail Lighting in Fridges, Freezer Cases and Vending Machines

简介

BCR421UW6属于集成电路（IC）的LED驱动器。由制造生产的BCR421UW6LED 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。