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首页 > Products > Led Driver > Non isolated LED Driver >  Non Isolation No PFC >Cxle8381/A/B is a high-precision non isolated step-down LED constant current driver chip which can be divided into three sections and four sections as switch section dimming through external pins
Cxle8381/A/B is a high-precision non isolated step-down LED constant current driver chip which can be divided into three sections and four sections as switch section dimming through external pins

The chip works in the critical continuous and intermittent mode of inductive current, and is suitable for the non isolated step-down LED constant current power supply with the input voltage of 85vac ~ 265vac.
When cxle8381 / A / b adopts four section dimming, the output current of the first switch is 100%, the output current of the second switch is 50%, the output current of the third switch is 25%, and the output current of the fourth switch is 12.5%. If the chip is set in three dimming sections, it will be 100%, 50% and 12.5% respectively. When the switch is closed for more than 5S, the chip will restart to the first power on state of 100% output current.

Cxle8381/A/B is a high-precision non isolated step-down LED constant current driver chip which can be divided into three sections and four sections as switch section dimming through external pins
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目录21W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) 21W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
21W嘉泰姆

一,产品概述(General Description)      21W嘉泰姆


  CXLE8381/A/B是一款高精度非隔离降压型LED恒流驱动芯片,可以通过外部引脚来选择分三段和四段作开关分段调光。芯片工作在电感电流临界连续和断续模式,适用于85Vac~265Vac全范围输入电压的非隔离降压型LED恒流电源。21W嘉泰姆
     当CXLE8381/A/B采用四段调光时,第一次开关上电输出电流时100%,第二次开关输出电流则变为50%,第三次开关输出电流变为25%,第四次开关则变为 12.5% 。如果芯片设置在三段调光则分别为100%,50%,12.5%。当开关关闭的时间超过 5S,再次加电时芯片就会重启到第一次上电100%输出电流状态。21W嘉泰姆
     CXLE8381/A/B芯片内部集成500V功率开关,芯片的工作电流极低,无需辅助绕组检测和供电,只需要很少的外围元件,即可实现优异的恒流特性,极大的节约了系统成本和体积。21W嘉泰姆
    CXLE8381/A/B芯片内带有高精度的电流采样电路,实现高精度的LED恒流输出和优异的线电压调整率,输出电流不随电感量和LED工作电压的变化而变化,实现优异的负载调整率。21W嘉泰姆
    CXLE8381/A/B 具有多重保护功能,包括 LED 开路/短路保护,ISEN 电阻短路保护,欠压保护,芯片温度过热调节等。21W嘉泰姆
    CXLE8381/A/B 采用 SOP-8/DIP-8 封装。21W嘉泰姆
二.产品特点(Features)
21W嘉泰姆


四段、三段调光可通过外部管脚选择21W嘉泰姆
内部集成500V 功率管21W嘉泰姆
无需辅助绕组检测和供电21W嘉泰姆
芯片超低工作电流21W嘉泰姆
宽输入电压21W嘉泰姆
LED开路保护21W嘉泰姆
LED短路保护21W嘉泰姆
ISEN电阻短路保护21W嘉泰姆
芯片供电欠压保护21W嘉泰姆
过热调节功能21W嘉泰姆
三,应用范围 (Applications)
21W嘉泰姆


 LED21W嘉泰姆
四.技术规格书下载(产品PDF)
21W嘉泰姆


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!21W嘉泰姆

 QQ截图20160419174301.jpg21W嘉泰姆

五,产品封装图 (Package)21W嘉泰姆


image.png21W嘉泰姆

引脚号21W嘉泰姆

符号21W嘉泰姆

功能21W嘉泰姆

121W嘉泰姆

GND21W嘉泰姆

电源地21W嘉泰姆

221W嘉泰姆

ROVP21W嘉泰姆

设置开路保护,外接电阻21W嘉泰姆

321W嘉泰姆

SEL21W嘉泰姆

分段选择,悬空三段,接地四段21W嘉泰姆

421W嘉泰姆

VDD21W嘉泰姆

工作电源21W嘉泰姆

5/621W嘉泰姆

DRAIN21W嘉泰姆

功率 MOSFET 的漏端21W嘉泰姆

7/821W嘉泰姆

ISEN21W嘉泰姆

电流采样端,接电阻到地21W嘉泰姆

六.电路原理图21W嘉泰姆


image.png七,功能概述21W嘉泰姆

项目21W嘉泰姆

符号21W嘉泰姆

参数范围21W嘉泰姆

单位21W嘉泰姆

VCC 引脚最大电源电流21W嘉泰姆

ICC_MAX21W嘉泰姆

1021W嘉泰姆

mA21W嘉泰姆

内部高压功率管漏极到源极峰值电压21W嘉泰姆

VDRAIN21W嘉泰姆

-0.3~50021W嘉泰姆

V21W嘉泰姆

电流采样端电压21W嘉泰姆

VISEN21W嘉泰姆

-0.3~621W嘉泰姆

V21W嘉泰姆

开漏保护电压调节端21W嘉泰姆

ROVP21W嘉泰姆

-0.3~621W嘉泰姆

V21W嘉泰姆

o21W嘉泰姆
最大耗散功率(Ta=25 C)21W嘉泰姆

Ptot21W嘉泰姆

0.45 @SOP-821W嘉泰姆

W21W嘉泰姆

0.90 @DIP-821W嘉泰姆

热阻结-环境21W嘉泰姆

     

Rthj-a21W嘉泰姆

145 @SOP-821W嘉泰姆

℃/W21W嘉泰姆

80 @DIP-821W嘉泰姆

 

工作结温范围21W嘉泰姆

     

TJ21W嘉泰姆

-40~15021W嘉泰姆

21W嘉泰姆

 

存储温度范围21W嘉泰姆

TSTG21W嘉泰姆

-55~15021W嘉泰姆

21W嘉泰姆

ESD21W嘉泰姆

 

2,00021W嘉泰姆

V21W嘉泰姆

八,相关芯片选择指南21W嘉泰姆

非隔离产品21W嘉泰姆

产品型号21W嘉泰姆

功率因素校正21W嘉泰姆

内置功率管21W嘉泰姆

封装形式21W嘉泰姆

功率范围21W嘉泰姆

封装21W嘉泰姆

CXLE836921W嘉泰姆

 

MOSFET,500V/0.5A21W嘉泰姆

TO-9421W嘉泰姆

<5W21W嘉泰姆

(TO-94)_CN21W嘉泰姆

CXLE837021W嘉泰姆

 

MOSFET,500V0.8A21W嘉泰姆

TO-9421W嘉泰姆

9W21W嘉泰姆

(TO-94)_CN21W嘉泰姆

CXLE837121W嘉泰姆

 

MOSFET,500V/0.8A21W嘉泰姆

SOP-821W嘉泰姆

<9W21W嘉泰姆

(SOP-8)_CN21W嘉泰姆

CXLE837221W嘉泰姆

 

MOSFET,500V/1A21W嘉泰姆

SOP-8,DIP-721W嘉泰姆

9-18W21W嘉泰姆

(SOP-8&DIP-7)_CN21W嘉泰姆

CXLE837321W嘉泰姆

 

MOSFET,500V/2A21W嘉泰姆

SOP-8,DIP-721W嘉泰姆

Up   to 36W21W嘉泰姆

(SOP-8&DIP-7)_CN21W嘉泰姆

CXLE837421W嘉泰姆

 

MOSFET,500V/0.5A21W嘉泰姆

TO-9421W嘉泰姆

<5W21W嘉泰姆

(TO-94)_CN21W嘉泰姆

CXLE837521W嘉泰姆

 

MOSFET,500V0.8A21W嘉泰姆

TO-9421W嘉泰姆

9W21W嘉泰姆

(TO-94)_CN21W嘉泰姆

CXLE837621W嘉泰姆

 

MOSFET,500V/0.8A21W嘉泰姆

SOP-821W嘉泰姆

<9W21W嘉泰姆

(SOP-8)_CN21W嘉泰姆

CXLE837721W嘉泰姆

 

MOSFET,500V/1A21W嘉泰姆

SOP-8,DIP-721W嘉泰姆

9-18W21W嘉泰姆

(SOP-8&DIP-7)_CN21W嘉泰姆

CXLE837821W嘉泰姆

 

MOSFET,500V/2A21W嘉泰姆

SOP-8,DIP-721W嘉泰姆

Up   to 36W21W嘉泰姆

(SOP-8&DIP-7)_CN21W嘉泰姆

CXLE837921W嘉泰姆

21W嘉泰姆

MOSFET,600V/2.0A21W嘉泰姆

SOP-8,DIP-721W嘉泰姆

10-20W21W嘉泰姆

(SOP&DIP-7)_CN21W嘉泰姆

CXLE838021W嘉泰姆

21W嘉泰姆

-21W嘉泰姆

SOT23-621W嘉泰姆

Up   to 60W21W嘉泰姆

(SOT23-6)_CN21W嘉泰姆

CXLE8381/A/B21W嘉泰姆

 

MOSFET,500V/0.8A21W嘉泰姆

SOP-821W嘉泰姆

<9W21W嘉泰姆

(SOP-8)_CN21W嘉泰姆

CXLE838221W嘉泰姆

 

MOSFET,500V/1A21W嘉泰姆

SOP-8,DIP-721W嘉泰姆

9-18W21W嘉泰姆

(SOP-8&DIP-7)_CN21W嘉泰姆

CXLE838321W嘉泰姆

 

MOSFET,500V/2A21W嘉泰姆

SOP-8,DIP-721W嘉泰姆

Up   to 36W21W嘉泰姆

(SOP-8&DIP-7)_CN21W嘉泰姆