CXLE8737是一款PWM高效LED驱动控制芯片。它允许高亮度（HB）led从85VAC到265VAC的电压源高效工作。
CXLE8737控制一个固定开关频率高达300kHz的外部MOSFET。频率可以用一个外部电阻编程。LED串是在恒定电流而不是恒定电压下驱动的，从而提供恒定的光输出和增强的可靠性。输出电流可以在几毫安到1.0A之间编程。
CXLE8737采用坚固的高压结隔离工艺，可承受高达500V的输入电压浪涌。通过在CXLE8737的线性调光控制输入端施加外部控制电压，可将LED串的输出电流编程为零到最大值之间的任何值
CXLE8737提供一个低频脉冲宽度调制调光输入，可以接收占空比为0-100%且频率高达几千赫兹的外部控制信号。
效率>90%
·通用整流85–265伏交流输入范围
恒流LED驱动器
从几毫安到超过一安输出的应用
·从一个二极管到数百个二极管的LED串
·通过使能引脚进行脉宽调制低频调光
输入电压浪涌额定值高达500V
内部热过载保护
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[ CXLE8737 ]
目录
产品概述 返回TOP
The CXLE8737 is a PWM high-efficiency LED driver control IC. It allows efficient operation of High Brightness (HB) LEDs from voltage sources ranging from 85VAC up to 265VAC.
The CXLE8737 controls an external MOSFET at fixed switching frequency up to 300kHz. The frequency can be programmed using a single external resistor. The LED string is driven at constant current rather than constant voltage, thus providing constant light output and enhanced reliability. The output current can be programmed between a few milliamps and up to more than 1.0A.
CXLE8737 uses a rugged high voltage junction isolated process that can withstand an input voltage surge of up to 500V. Output current to an 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 CXLE8737
The CXLE8737provides a low-frequency PWM dimming input that can accept an external control signal with a duty ratio of 0-100% and a frequency of up to a few kilohertz.
产品特点 返回TOP
„ > 90% Efficiency
„ Universal rectified 85 – 265VAC input range
„ Constant-current LED driver
„ Applications from a few mA to more than 1A Output
„ LED string from one to hundreds of diodes
„ PWM Low-Frequency Dimming via Enable pin
„ Input Voltage Surge ratings up to 500V
„ Internal thermal overload protection
应用范围 返回TOP
„ AC/DC LED Driver applications
„ RGB Backlighting LED Driver
„ Back Lighting of Flat Panel Displays
„ General purpose constant current source
„ Signage and Decorative LED Lighting
„ Chargers
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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LED日光灯&球泡灯驱动IC |
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型号 |
输入电压 |
驱动电流 |
工作 |
关机 电流 |
采样 阀值 |
调光功能 |
保护功能 |
封装 |
|
8V-600V |
1A |
90% |
0.23mA |
0.25V |
线性调光/PWM调光 |
欠压/过温/过流/短路保护 |
SOP8 |
|
|
8V-600V |
1A |
90% |
0.23mA |
0.25V |
线性调光/PWM调光 |
欠压/过温/过流/短路保护 |
SOP8 |
|
|
10V-24V/500V |
1A/内置500VMOS |
90% |
0.36mA |
0.2V |
带有源PFC |
欠压/过温/过流/短路保护 |
SOP8 |
|
|
7.0V-7.6V/500V |
1A/内置500VMOS |
90% |
0.20mA |
0.4V |
欠压/过温/过流/短路保护 |
SOP8 |
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