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首页 > Products > Led Driver > Isolated LED Driver > Isolated No PFC >Cxle8421 is a kind of high-precision constant current driver chip with primary feedback flyback led. It is suitable for the application of isolated LED lighting system with full voltage input range of 85VAC~265VAC
Cxle8421 is a kind of high-precision constant current driver chip with primary feedback flyback led. It is suitable for the application of isolated LED lighting system with full voltage input range of 85VAC~265VAC

Cxle8421 adopts the control mode of original side feedback, through the information of original side feedback, high-precision LED constant current output can be realized, without optocoupler, secondary feedback and other circuits. This saves the cost and volume of the system and simplifies the design of LED lighting system.
Cxle8421 integrates line voltage compensation and load compensation functions, and the system has excellent line voltage regulation and load regulation. Cxle8421 works in quasi resonant switch mode, and the power tube is in zero current state. This effectively reduces the switching loss of the power tube, improves the system efficiency, and improves the EMI characteristics of the system.
Cxle8421 has a wide working voltage range and is suitable for AC input of 85vac ~ 265vac full voltage range. At the same time, cxle8421 integrates multiple protection functions to ensure the stability and reliability of the system. Including VCC power supply over-voltage protection, VCC power supply under voltage protection, led open circuit, short circuit protection, chip over temperature protection

Cxle8421 is a kind of high-precision constant current driver chip with primary feedback flyback led. It is suitable for the application of isolated LED lighting system with full voltage input range of 85VAC~265VAC
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目录sH7嘉泰姆

1.产品概述       2.产品特点     3.应用范围      4.技术规格书下载(产品PDF文档) sH7嘉泰姆
5.产品封装图   6.电路原理图  7.功能概述      8.相关产品
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一,产品概述(General Description)      sH7嘉泰姆


   CXLE8421是一款高精度的原边反馈反激型LED恒流驱动芯片。适合于85VAC~265VAC全电压输入范围的隔离式LED照明系统应用sH7嘉泰姆
     CXLE8421采用原边反馈的控制方式,通过原边反馈的信息即可以实现高精度的LED恒流输出,并不需要光耦、次级反馈等电路。这节约了系统的成本和体积,简化了LED照明系统的设计。sH7嘉泰姆
    CXLE8421集成了线电压补偿和负载补偿功能,系统具有优异的线电压调整率和负载调整率。CXLE8421工作在准谐振开关模式,功率管处于零电流状态导通。这有效地减小了功率管的开关损耗,提高了系统效率,同时也改善了系统的EMI特性。sH7嘉泰姆
    CXLE8421工作电压范围宽,适用于85VAC~265VAC全电压范围的交流输入。同时CXLE8421集成了多种保护功能以保证系统的稳定和可靠。包括VCC供电过压保护,VCC供电欠压保护,LED开路、短路保护,芯片过温保护等。sH7嘉泰姆
二.产品特点(Features)
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原边反馈恒流控制,无需次级反馈电路sH7嘉泰姆
准谐振开关模式,开关损耗小sH7嘉泰姆
±3%的 LED 输出电流精度sH7嘉泰姆
优异的线电压调整率和负载调整率sH7嘉泰姆
超低启动电流sH7嘉泰姆
LED 输出开路保护sH7嘉泰姆
LED 输出短路保护sH7嘉泰姆
VCC 供电过压保护sH7嘉泰姆
VCC 供电欠压保护sH7嘉泰姆
自动重启动功能sH7嘉泰姆
芯片过温保护sH7嘉泰姆
采用 SOT23-6L 封装sH7嘉泰姆
三,应用范围 (Applications)
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LED 球泡灯,LED 射灯sH7嘉泰姆
LED 日光灯,LED 筒灯sH7嘉泰姆
LED 吸顶灯,LED PAR 灯sH7嘉泰姆
其它 LED 照明sH7嘉泰姆
四.技术规格书下载(产品PDF)
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需要详细的PDF规格书请扫一扫微信联系我们,还可以获得免费样品以及技术支持!sH7嘉泰姆

 QQ截图20160419174301.jpgsH7嘉泰姆

五,产品封装图 (Package)sH7嘉泰姆


image.pngsH7嘉泰姆

管脚编号sH7嘉泰姆

管脚名称sH7嘉泰姆

描述sH7嘉泰姆

1sH7嘉泰姆

CSsH7嘉泰姆

变压器初级绕组电流采样引脚,连接电阻到地sH7嘉泰姆

2sH7嘉泰姆

GNDsH7嘉泰姆

芯片地sH7嘉泰姆

3sH7嘉泰姆

COMPsH7嘉泰姆

环路补偿引脚,连接 RC 网络到地sH7嘉泰姆

4sH7嘉泰姆

ZCDsH7嘉泰姆

变压器次级绕组电流过零检测、LED 输出开路保护检测和线电压补偿微调引脚sH7嘉泰姆

5sH7嘉泰姆

VCCsH7嘉泰姆

芯片电源引脚sH7嘉泰姆

6sH7嘉泰姆

DRVsH7嘉泰姆

外部功率管的栅极驱动引脚sH7嘉泰姆

六.电路原理图sH7嘉泰姆


image.pngsH7嘉泰姆

七,功能概述sH7嘉泰姆


参数sH7嘉泰姆

额定值sH7嘉泰姆

单位sH7嘉泰姆

VCC, DRV 到 GND 电压sH7嘉泰姆

-0.3~+25sH7嘉泰姆

VsH7嘉泰姆

CS,COMP,ZCD 到 GND 电压sH7嘉泰姆

-0.3~+6sH7嘉泰姆

VsH7嘉泰姆

VCC 引脚电源电流sH7嘉泰姆

5sH7嘉泰姆

mAsH7嘉泰姆

功率损耗sH7嘉泰姆

0.5sH7嘉泰姆

WsH7嘉泰姆

储存环境温度sH7嘉泰姆

-50~+150sH7嘉泰姆

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工作结温范围sH7嘉泰姆

-40~+150sH7嘉泰姆

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ESD 水平(HBM)sH7嘉泰姆

2000sH7嘉泰姆

VsH7嘉泰姆

ESD 水平(MM)sH7嘉泰姆

200sH7嘉泰姆

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八,相关芯片选择指南sH7嘉泰姆


LED驱动芯片>隔离不带PFCsH7嘉泰姆

产品名称sH7嘉泰姆

功率管sH7嘉泰姆

调光方式sH7嘉泰姆

封装sH7嘉泰姆

典型应用sH7嘉泰姆

最大功率sH7嘉泰姆

应用领域sH7嘉泰姆

CXLE8419sH7嘉泰姆

外置sH7嘉泰姆

三段开关sH7嘉泰姆

SOP8sH7嘉泰姆

5~36WsH7嘉泰姆

40WsH7嘉泰姆

LED日光灯sH7嘉泰姆

CXLE8420sH7嘉泰姆

650V/4ΩsH7嘉泰姆

不支持sH7嘉泰姆

SOP8sH7嘉泰姆

36V/300mAsH7嘉泰姆

12WsH7嘉泰姆

LED日光灯sH7嘉泰姆

CXLE8421sH7嘉泰姆

外置sH7嘉泰姆

不支持sH7嘉泰姆

SOT23-6sH7嘉泰姆

5~36WsH7嘉泰姆

40WsH7嘉泰姆

LED吸顶灯sH7嘉泰姆

CXLE8422sH7嘉泰姆

650V/10ΩsH7嘉泰姆

三段开关sH7嘉泰姆

SOP8sH7嘉泰姆

23V/300mAsH7嘉泰姆

7WsH7嘉泰姆

LED筒灯sH7嘉泰姆

CXLE8423sH7嘉泰姆

650V/10ΩsH7嘉泰姆

不支持sH7嘉泰姆

SOP8sH7嘉泰姆

23V/300mAsH7嘉泰姆

7WsH7嘉泰姆

LED球泡灯sH7嘉泰姆

CXLE8424sH7嘉泰姆

650V/17ΩsH7嘉泰姆

不支持sH7嘉泰姆

SOP8sH7嘉泰姆

16V/300mAsH7嘉泰姆

5WsH7嘉泰姆

LED蜡烛灯sH7嘉泰姆

CXLE8425sH7嘉泰姆

650V/23ΩsH7嘉泰姆

不支持sH7嘉泰姆

SOP8sH7嘉泰姆

10V/300mAsH7嘉泰姆

3WsH7嘉泰姆

GU10射灯sH7嘉泰姆