CXLE8283是一个高效PWM LED驱动器控制芯片，它在输入电压DC/DC从10V~600V范围内能有效驱动高亮LED。该芯片能以高达300kHz的固定频率驱动外部MOSFET，其频率外部电阻编程决定.为了保正亮度恒定并增强LED的可靠 性，外部高亮LED串采用恒流方式控制，而不是恒压控制. 其恒流值由外部取样电阻值决定，变化范围从几毫安到1安培。使用了一个高压隔离连接工艺能经

   产品概述 返回TOPCqb嘉泰姆

   The CXLE8283 is a PWM high-efficiency LED drivercontrol IC. It allows efficient operation of high-brightness (HB) LEDs from voltage sources ranging from 10VDC up to 600VDC. The controls an externalMOSFET at fixed switching frequencies up to 300 kHz . The frequency can be programmed using a single resistor. The LED string is driven at a constant current rather than a constant voltage, thus providing a constant light output and an enhanced reliability. The output current can be programmed between a few milliamps and up to more than 1.0A. The CXLE8283 uses a rugged high-voltage junction isolated process that can withstand an input voltage surge up to 600V. The output current to a LED string can be programmed to any value between zero and its maximum value by applying an external control voltage at the linear dimming control input of the CXLE8283.The CXLE8283 provides a low-frequency PWM dimming input that can canaccept an external control signal with a duty ratio ofCqb嘉泰姆

0-100% and a frequency of up to a few kilohertz.
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CXLE8283是一个高效PWM LED驱动器控制芯片，它在输入电压DC/DC从10V~600V范围内能有效驱动高亮LED。该芯片能以高达300kHz的固定频率驱动外部MOSFET，其频率外部电阻编程决定.为了保正亮度恒定并增强LED的可靠 性，外部高亮LED串采用恒流方式控制，而不是恒压控制. 其恒流值由外部取样电阻值决定，变化范围从几毫安到1安培。CXLE8283使用了一个高压隔离连接工艺能经受高达600V的浪涌输入电压的冲击。对一个 LED 串的输出电流能被编程设定在零和它的最大值之间的任何值，它由输入到CXLE8283的线性调光器的外部控制电压所控制。另外CXLE8283也提供一个低频的PWM 调光功能，能接受一个外部达几千赫磁的控制信号在0-100% 的占空比下进行调光。</span>Cqb嘉泰姆

   产品特点 返回TOPCqb嘉泰姆

>90% efficiencyCqb嘉泰姆

10V to 600V input rangeCqb嘉泰姆

Constant-current LED driverCqb嘉泰姆

Applications from a few mA to more than 1A outputCqb嘉泰姆

LED string from one to hundreds of diodesCqb嘉泰姆

Linear and PWM dimming capabilityCqb嘉泰姆

Input voltage surge ratings up to 600VCqb嘉泰姆

Over Temperature ProtectionCqb嘉泰姆

   应用范围 返回TOPCqb嘉泰姆

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DC/DC or AC/DC LED driver applicationsCqb嘉泰姆

RGB backlighting LED driverCqb嘉泰姆

Backlighting of flat panel displaysCqb嘉泰姆

General-purpose constant current sourceCqb嘉泰姆

Signage and decorative LED lightingCqb嘉泰姆

AutomotiveCqb嘉泰姆

ChargersCqb嘉泰姆

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