Cxle8378 cxle8379 integrated active power factor correction circuit, can achieve very high
Low power factor and total harmonic distortion. Due to the operation in the critical continuous mode of inductor current, the power MOS transistor is in the zero current on state, the switching loss can be reduced, and the utilization rate of inductor is also high.
Cxle8378 cxle8379 is internally integrated with 600V power MOSFET, which only needs a few peripheral devices to achieve excellent constant current characteristics. Cxle8378 cxle8379 samples inductor current in full cycle, which can achieve high-precision output constant current control, and achieve excellent line voltage adjustment rate and load adjustment rate.
Cxle8378 cxle8379 has multiple protection functions to enhance system reliability, including LED open circuit protection, led short circuit protection, chip power supply undervoltage protection, current sampling resistance open circuit protection and cycle by cycle current limiting. All protection states have automatic restart function. In addition, cxle8378 cxle8379 has
Overheat regulation function reduces the output current when the driving power is overheated, so as to improve the reliability of the system
-
[ CXLE8378 ]"
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)
CXLE8378 CXLE8379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。CXLE8378 CXLE8379集成有源功率因数校正电路，可以实现很高的功率因数和很低的总谐波失真。由于工作在电感电流临界连续模式，功率MOS 管处于零电流开通状态，开关损耗得以减小，同时电感的利用率也较高。
CXLE8378 CXLE8379内部集成600V 功率MOSFET,只需要很少的外围器件，即可实现优异的恒流特性. CXLE8378 CXLE8379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。CXLE8378 CXLE8379 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，CXLE8378 CXLE8379 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。CXLE8378 CXLE8379 采用 SOP-8/DIP-7 封装。
二.产品特点(Features)
单级、有源功率因数校正，高PF 值，低THD
内置600V 功率 MOSFET
±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
超低 (33uA) 启动电流
高达95%的系统效率
超低 (300uA) 工作电流
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 |
COMP |
补偿脚 |
|
2 |
GND |
地 |
|
3 |
VDD |
电源 |
|
4 |
FB |
过零检测端,兼过压保护功能 |
|
5/6 |
DRAIN |
内部高压 MOSFET 的漏端 |
|
7/8 |
ISEN |
电流采样端，接电阻到地 |
六.电路原理图
七,功能概述
|
项目 |
符号 |
参数范围 |
单位 |
|
漏极电压 |
VDRN |
-0.3～600 |
V |
|
电流采样端电压 |
VISEN |
-0.3～6 |
V |
|
补偿端电压 |
Vcomp |
-0.3～6 |
V |
|
过零检测端电压 |
VFB |
-0.3～6 |
V |
|
最大工作电流 |
IDDMAX |
10 |
mA |
|
o |
Ptot |
0.45@ SOP-8 |
W |
|
0.90@ DIP-7 |
|||
|
热阻结-环境 |
|||
|
Rthj-a |
145@ SOP-8 |
℃/W |
|
|
80@ DIP-7 |
|||
|
工作结温范围 |
|||
|
TJ |
-40～150 |
℃ |
|
|
存储温度范围 |
TSTG |
-55～150 |
℃ |
|
ESD |
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 |
||
