Cxle8377 is an active power factor correction LED constant current control chip, which is used in non isolated step-down circuit. The system works in inductive current critical continuous mode, and can achieve high power factor, low total harmonic distortion and high
Efficiency. Cxle8377 can realize high precision output constant current control and excellent line voltage regulation and load regulation by sampling inductance current in full period.
Cxle8377 has multiple protection functions to enhance the reliability of the system, including LED open circuit protection, led short circuit protection, chip power supply undervoltage and overvoltage protection, current sampling resistance open circuit protection and cycle by cycle current limiting. All protective forms
State has automatic restart function. In addition,
Cxle8377 has overheat regulation function, which can reduce the output current when the driving power is overheated, so as to improve the reliability of the system
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[ CXLE8377 ]"
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（产品PDF文档）
5.产品封装图 6.电路原理图 7.功能概述 8.相关产品
一,产品概述(General Description)
CXLE8377是高性能带有源功率因数校正的高精度降压型LED 恒流控制芯片，适用于85Vac-265Vac 全范围输入电压的非隔离降压式LED恒流电源。
CXLE8377 是一款有源功率因数校正 LED 恒流控制芯片，用于非隔离降压型电路，系统工作在电感电流临界连续模式，可以实现很高的功率因数、很低的总谐波失真和高效率。 CXLE8377 对电感电流进行全周期采样，可实现高精度输出恒流控制，并达到优异的线电压调整率和负载调整率。
CXLE8377 具有多重保护功能以加强系统可靠性，包括 LED 开路保护、LED 短路保护、芯片供电欠压和过压保护、电流采样电阻开路保护和逐周期限流等。所有的保护状态都具有自动重启功能。另外，CXLE8377 具有过热调节功能，在驱动电源过热时减小输出电流，以提高系统的可靠性。
CXLE8377 采用 SOT23-6 封装。
二.产品特点(Features)
单级、有源功率因数校正，高PF 值，低THD
无需辅助绕组供电
±3% LED 输出电流精度
优异的线电压调整率和负载调整率
电感电流临界连续模式
高达95%的系统效率
LED 开路/短路保护
电流采样电阻开路保护
逐周期原边电流限流
芯片供电过压/欠压保护
自动重启功能
过热调节功能
三,应用范围 (Applications)
LED
四.技术规格书下载（产品PDF）
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！
五,产品封装图 (Package)
|
引脚号 |
符号 |
功能 |
|
1 |
ISEN |
电流采样端，接电阻到地 |
|
2 |
GND |
地 |
|
3 |
GATE |
外接 MOSFET 管栅极驱动脚 |
|
4 |
VDD |
电源 |
|
5 |
FB |
过零检测端,兼过压保护功能 |
|
6 |
COMP |
补偿脚 |
六.电路原理图
七,功能概述
|
项目 |
符号 |
描述说明 |
最小值 |
最大值 |
单位 |
|
Voltage |
VDD_MAX |
Maximum Voltage On VDD Pin |
43 |
V |
|
|
VGATE_MAX |
Maximum Voltage On Gate Pin |
18 |
V |
||
|
VMAX_ALL |
Maximum Voltage On All others Pins |
-0.3 |
4.5 |
V |
|
|
Power Dissipation |
Ptot |
o |
0.30 |
W |
|
|
Thermal Resistance |
Rthj-a |
Thermal Resistance Junction-ambient |
220 |
℃/W |
|
|
Temperature |
TJ |
Operating Junction Temperature |
150 |
o |
|
|
TSTG |
Storage Temperature Range |
-55 |
150 |
o |
|
|
ESD |
ESD Voltage for Human Body Mode |
2,000 |
V |
八,相关芯片选择指南
|
非隔离产品 |
|||||
|
产品型号 |
功率因素校正 |
内置功率管 |
封装形式 |
功率范围 |
封装 |
|
MOSFET,500V/0.5A |
TO-94 |
<5W |
(TO-94)_CN |
||
|
MOSFET,500V0.8A |
TO-94 |
9W |
(TO-94)_CN |
||
|
MOSFET,500V/0.8A |
SOP-8 |
<9W |
（SOP-8)_CN |
||
|
MOSFET,500V/1A |
SOP-8,DIP-7 |
9-18W |
（SOP-8&DIP-7)_CN |
||
|
MOSFET,500V/2A |
SOP-8,DIP-7 |
Up to 36W |
（SOP-8&DIP-7)_CN |
||
|
MOSFET,500V/0.5A |
TO-94 |
<5W |
(TO-94)_CN |
||
|
MOSFET,500V0.8A |
TO-94 |
9W |
(TO-94)_CN |
||
|
MOSFET,500V/0.8A |
SOP-8 |
<9W |
（SOP-8)_CN |
||
|
MOSFET,500V/1A |
SOP-8,DIP-7 |
9-18W |
（SOP-8&DIP-7)_CN |
||
|
MOSFET,500V/2A |
SOP-8,DIP-7 |
Up to 36W |
（SOP-8&DIP-7)_CN |
||
|
√ |
MOSFET,600V/2.0A |
SOP-8,DIP-7 |
10-20W |
(SOP&DIP-7)_CN |
|
|
√ |
- |
SOT23-6 |
Up to 60W |
(SOT23-6)_CN |
|
|
MOSFET,500V/0.8A |
SOP-8 |
<9W |
(SOP-8)_CN |
||
|
MOSFET,500V/1A |
SOP-8,DIP-7 |
9-18W |
(SOP-8&DIP-7)_CN |
||
|
MOSFET,500V/2A |
SOP-8,DIP-7 |
Up to 36W |
(SOP-8&DIP-7)_CN |
||
