The cxac8505 uses the original edge sampling for precise constant current and constant voltage control, which can eliminate the optocoupler and TL431 in general application. In the constant current mode, the output power can be set by the sampling resistance Rs external to the CS pin. In the constant voltage mode, the chip can work in a variety of modes to ensure a high overall conversion efficiency. In addition, the chip is built-in wired voltage drop compensation
As a result, the cxac8505 achieves good load adjustment rate. Cxac8505 works in PFM state in constant current mode, PWM state in constant voltage mode, frequency reduction in light load.
Cxac8505 provides power on soft start function and various self recovery protection functions, including OCP, OVP, UVLO
Cxac8505 over temperature protection, etc. Cxac8505 can provide better EMI performance due to its buffing function

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[ CXAC8505 ]"
目录
产品概述 返回TOP
CXAC8505是一颗高精度离线式开关电源电路,应用于低功耗AC/DC充电器与适配器。CXAC8505最大输出功率12W,采用SOP8封装.
CXAC8505使用原边取样来进行精确的恒流、恒压控制,可以省去一般应用中的光耦与TL431。在恒流模式下,输出功率可由CS脚外接的取样电阻Rs设定。在恒压模式下,芯片的多种工作模式可以保证较高的整体转换效率。此外,芯片内置有线压降补偿.
CXAC8505由此取得良好的负载调整率。CXAC8505在恒流模式下工作于PFM状态,在恒压模式下工作于PWM状态,轻载时降频工作。
CXAC8505提供上电软启动功能与各种可自恢复的保护功能,包括逐周期限流保护(OCP),VDD过压保护(OVP),VDD过压箝位,欠压保护(UVLO).
CXAC8505过温保护等。CXAC8505具有的抖频功能,可以提供更好的EMI性能。
产品特点 返回TOP
l 全电压范围内5%的恒压精度、5%的恒流精度
l 使用原边反馈控制,可省去光耦与TL431
l 外部可设定恒流值与输出功率
l 内置原边反馈恒流控制
l 内建自适应峰值电流控制
l 内建原边电感补偿
l 可外部调整的线压降补偿
l 上电软启动
l 内置前沿消隐(LEB)功能
l 逐周期限流保护(OCP)
l 欠压保护(UVLO)、过压保护(OVP)、VDD 电压箝位保护
应用范围 返回TOP
手机充电器
PDA、数码相机充电器
电视、个人电脑的辅助电源
可替代线性稳压器、RCC 电源
技术规格书(产品PDF) 返回TOP
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!
产品封装图 返回TOP
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电路原理图 返回TOP
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相关芯片选择指南 返回TOP 更多同类产品.....
Small& Medium Power Controller (中小功率控制芯片) |
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Part Number |
Power |
Power |
Standby |
MODE |
Freq |
Accu |
OTP/ |
Package |
(80-265V) |
(175-265V) |
(mW) |
(Flyback) |
(KHz) |
OVP |
|||
10W |
12W |
≤300 |
PFM |
65 |
±1% |
-/ Y |
TO92 |
|
15W |
18W |
≤200 |
PWM |
45-80 ADJ |
±1% |
Y/ Y |
DIP8 |
|
15W |
18W |
≤150 |
PWM |
45-80 ADJ |
±1% |
-/ Y |
DIP8 |
|
12W |
18W |
≤150 |
PWM |
45-80/ADJ |
±1% |
Y/ Y |
DIP8 |
|
5W |
7W |
≤150 |
PWM |
45-80/ADJ |
±5% |
Y/ Y |
SOP8/ESOP8 |
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
-/ Y |
DIP8 |
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
-/ Y |
DIP8 |
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
-/ Y |
DIP8 |
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
Y/ Y |
DIP8 |
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
Y/ Y |
DIP8 |
|
15W |
18W |
≤100 |
PWM |
65 |
±1% |
Y/ Y |
DIP8 |
|
18W |
24W |
≤100 |
PWM |
65 |
±1% |
Y/ Y |
DIP8 |
|
12W |
18W |
≤100 |
PWM |
60 |
±1% |
Y/ Y |
DIP8 |
|
12W |
18W |
≤100 |
PWM |
60 |
±1% |
Y/ Y |
DIP8 |
|
18W |
24W |
≤100 |
PWM |
65 |
±1% |
Y/ Y |
DIP8 |
|
15W |
18W |
≤100 |
QR |
90 |
±1% |
Y/ Y |
DIP7 |
|
12W |
18W |
≤100 |
PWM |
60 |
±1% |
Y/ Y |
DIP8 |