CXLE8450输入电压波动引起的LED电流波动照明离线控制器PFM脉冲频率调制控制功率因数改善功能工作输入电压85VAC至270VAC高功率因数低THD

CXLE8450系列是LED照明离线控制器，使用PFM（脉冲频率调制）控制，具有功率因数改善功能。工作输入电压范围为85VAC至270VAC，电流在一次侧控制，无需使用光耦或二次侧控制电路。由于输入电压波动引起的LED电流波动和LED电压波动可以得到抑制，因此得到了稳定的LED照明电源。通过同步输入电流和输入电压，可以获得高功率因数和低THD，并且在DCM（间断电流模式）下工作，可以实现高效率。内部加速启动电路可使LED灯快速点亮。提供过电压保护、过电流保护、UVLO和热关机等保护功能，在LED开路/短路时保护LED照明。

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXLE8450 series are off-line controller ICs for LED lighting. Through optimization of the external components, these ICs can be made to operate in a range from 85VAC to 270VAC, as well as by DC input, and a diversity of specifications can be achieved by selecting components appropriate for the circuit configuration. Fixed off-time control is used for the basic control method, and by detecting the current that flows to the external power MOSFET, the current that flows to the LED is monitored to provide a stable power supply for LED lighting. Three product series differing by function type are available, the CXLE8450A type, CXLE8450B type and the CXLE8450C type. The circuit configuration of type A is designed for the power factor, achieving a high power factor by synchronizing the LED current to the input current (sine wave). Type B and C holds the peak current due to switching that flows to the external power MOSFET constant, enabling the LED current to be kept constant. With the type C, dimming is possible by inputting a PWM signal into the EN/DIM pin to set the LED current within a range of 1% to 100%.

   产品特点 返回TOP

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   应用范围 返回TOP

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●LED bulb (GU-10, MR-16, Other) 

●LED tube lights

●LED down lights 

●LED spot lights 

●LED stands

   技术规格书（产品PDF) 返回TOP 

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产品封装图 返回TOP

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电路原理图 返回TOP

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LED照明
产品名称	特点	封装	输入电压 (V)	最大输 出功率 (W)	调光	绝缘/ 非绝缘	精度 (%)	温度范围(℃)
CXLE8449	Offline Controller with Power Factor Correction	SOP-8D	85～270	50	-		3	-40～+105
CXLE8450	AC/DC输入的条件下工作	SOT-25  SOT-26	100～120 220～240	25	PWM Analog	非绝缘	±5  ±2.5	-40～＋85