Cxle8448 is a high precision LED constant current control switch with primary side feedback. The chip works in the discontinuous mode of inductive current, which is suitable for flyback isolation LED constant current power supply with full input voltage range and power below 18W. The cxle8448 chip is internally integrated with 650V power switch. It adopts the original side feedback mode, without secondary feedback circuit and compensation circuit, and only needs a few peripheral components to achieve constant current, which greatly saves the cost and volume of the system. The cxle8448 chip has a high-precision current sampling circuit, which makes the LED output current accuracy within ?3%. The chip adopts the patented constant current control mode, which can achieve excellent linear adjustment rate and load adjustment rate. Cxle8448 has multiple protection functions, including LED open circuit protection, led short circuit protection, chip over temperature protection, over-voltage protection, under voltage protection and FB short circuit protection
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[ CXLE8448 ]"
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
CXLE8448是一款高精度原边反馈的LED恒流控制开关。芯片工作在电感电流断续模式，适用于全输入电压范围功率18W以下的反激式隔离LED恒流电源。 CXLE8448 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恒流,极大的节约了系统的成本和体积。CXLE8448芯片内带有高精度的电流取样电路，使得LED 输出电流精度达到±3%以内。芯片采用了专利的恒流控制方式，可以达到优异的线性调整率和负 载调整率。 CXLE8448具有多重保护功能,包括LED开路保护、LED短路保护、芯片过温保护、过压保护、欠压保护和FB短路保护等。 CXLE8448采用DIP-8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
±3%的输出电流精度
芯片超低工作电流，功耗低
FB反馈电阻阻值高，功耗低
宽输入电压
LED短路/开路保护
欠压保护
FB对地短路保护
CS采样电阻开路保护
过温保护
无需环路补偿
三.应用范围
LED球泡灯 射灯
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 |
|
