Cxle8439a chip is internally integrated with 650V power switch, which adopts the original side feedback mode, without secondary feedback circuit and compensation circuit, and only requires a few peripheral components to achieve excellent constant current characteristics. With patented drive and current detection mode, the working current of the chip is very low, no need for transformer auxiliary winding detection and power supply, further reducing peripheral components, greatly saving the system cost and volume. The cxle8439a chip has a high-precision current sampling circuit and a patented constant current control technology, which can achieve high-precision LED constant current output and excellent line voltage regulation. The LED open circuit voltage can be precisely controlled by adjusting the external resistance. Cxle8439a has multiple protection functions, including LED open / short circuit protection, CS resistance short circuit protection, undervoltage protection, chip temperature overheat regulation
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[ CXLE8439A ]"
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）
一.产品概述
CXLE8439A是一款高精度原边反馈的LED恒流驱动芯片。芯片工作在电感电流断续模式，适用于 85Vac~265Vac全范围输入电压、功率 5W 以下的反 激式隔离LED恒流电源。 CXLE8439A 芯片内部集成650V功率开关，采用原边反馈模式，无需次级反馈电路，也无需补偿电路，只需要极少的外围元件即可实现优异的恒流特性。采用专利的驱动和电流检测方式，芯片的工作电流极低，无需变压器辅助绕组检测和供电，进一步减少外围元器件，极大的节约了系统成本和体积。 CXLE8439A芯片内带有高精度的电流采样电路，同时 采用了专利的恒流控制技术，可实现高精度的LED恒流输出和优异的线电压调整率。通过调整外部电阻可精确控制 LED 开路电压。 CXLE8439A具有多重保护功能，包括LED开路/短路保 护，CS电阻短路保护，欠压保护，芯片温度过热调节等。 CXLE8439A采用SOP8封装。
二.产品特点
内部集成650V功率管
原边反馈恒流控制，无需次级反馈电路
无需变压器辅助绕组检测和供电
LED开路电压可通过外部电阻调整
芯片超低工作电流
宽输入电压
±6%LED输出电流精度
LED短路/开路保护
CS电阻短路保护
芯片供电欠压保护
过热调节功能
采用SOP8封装
三.应用范围
GU10 LED射灯
LED球泡灯
其它LED照明
四.技术规格书（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
六.电路原理图
七.相关芯片选择指南 更多同类产品......
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AC/DC隔离低PF |
||||||||
|
Part |
PF |
Number of |
Internal MOS |
Internal MOS |
Open circuit |
Pout@Vin: |
Pout@Vin: |
Package |
|
number |
windings |
Rdson（Ω） |
BVDSS（V） |
protection |
85-265V（W) |
176-265V（W) |
||
|
0.5 |
2 |
30 |
650 |
Internal |
3 |
4 |
CPC4 |
|
|
0.5 |
2 |
18 |
650 |
Internal |
5 |
6 |
CPC4 |
|
|
0.5 |
2 |
30 |
650 |
Internal |
3 |
4 |
TO92 |
|
|
0.5 |
2 |
18 |
650 |
Internal |
5 |
6 |
TO92 |
|
|
0.5 |
2 |
30 |
650 |
Internal |
3 |
4 |
SOP8 |
|
|
0.5 |
2 |
18 |
650 |
Internal |
5 |
6 |
SOP8 |
|
|
0.5 |
2 |
12 |
650 |
Internal |
5 |
6 |
SOP8 |
|
|
0.5 |
2 |
14 |
650 |
Internal |
5 |
6 |
SOP8 |
|
|
0.5 |
2 |
9 |
650 |
External |
7 |
10 |
SOP8 |
|
|
0.5 |
2 |
9 |
650 |
External |
12 |
15 |
DIP8 |
|
|
0.5 |
2 |
4.5 |
650 |
External |
18 |
21 |
DIP8 |
|
|
0.5 |
2 |
24 |
650 |
External |
3 |
5 |
SOP8 |
|
|
0.5 |
2 |
14 |
650 |
External |
5 |
7 |
SOP8 |
|
|
0.5 |
2 |
9 |
650 |
External |
7 |
10 |
SOP8 |
|
|
0.5 |
3 |
9 |
600 |
External |
12 |
15 |
DIP8 |
|
|
0.5 |
3 |
4.5 |
650 |
External |
18 |
21 |
DIP8 |
|
|
0.5 |
3 |
2 |
650 |
External |
24 |
30 |
DIP8 |
|
|
0.5 |
3 |
- |
- |
External |
50 |
75 |
SOT23-5 |
|
|
0.5 |
3 |
- |
- |
External |
50 |
75 |
SOT23-5 |
|
