CXAC8577B CXAC8578结合了一个专用的电流模式PWM控制器和一个高压功率MOSFET。它是为高性能，低待机功率和低成本效益离线反激变换器应用在15瓦以下的范围优化。CXAC8577B CXAC8578提供完整的保护范围和自动自恢复功能，包括逐周限流（OCP）、过载保护（OLP）、VDD过电压钳位和欠电压锁定（UVLO）。卓越的电磁干扰性能是通过专有的频率洗牌技术以及图腾极栅极驱动输出的软开关控制实现的。在设计中，将20KHZ以下的声频能量降到最低，并在运行过程中消除了音频噪声
电磁干扰的频率洗牌
扩展突发模式控制，提高效率和最小待机功率设计
音频无噪音操作
固定50KHZ开关频率
内部同步斜坡补偿
低VDD启动电流和低工作电流
电流感应输入前沿消隐良好保护
自动恢复覆盖范围
VDD过电压钳位和欠电压锁定
滞后（UVLO）
·线路输入补偿循环超过电流阈值
通用输入恒定输出功率限制设置
电压范围
过载保护（OLP）
过电压保护（OVP）
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[ CXAC8577B ]"
目录
产品概述 返回TOP
CXAC8577B CXAC8578combines a dedicated current mode PWM controller with a high voltage power MOSFET. It is optimized for high performance, low standby power, and cost effective off-line flyback converter applications in sub 15W range. CXAC8577B CXAC8578 offers complete protection coverage with automatic self-recovery feature including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD over voltage clamp and under voltage lockout (UVLO). Excellent EMI performance is achieved with proprietary frequency shuffling technique together with soft switching control at the totem pole gate drive output. The tone energy at below 20KHZ is minimized in the design and audio noise is eliminated during operation. BCXAC8577B CXAC8578is offered in DIP-8 & DIP-7 package.
产品特点 返回TOP
■Power on Soft Start Reducing MOSFET VDS Stress
■Frequency shuffling for EMI
■Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design
■Audio Noise Free Operation
■Fixed 50KHZ Switching Frequency
■Internal Synchronized Slope Compensation
■Low VDD Startup Current and Low Operating Current
■Leading Edge Blanking on Current Sense Input Good Protection
Coverage With Auto Self-Recovery
VDD Over Voltage Clamp and Under Voltage Lockout with
Hysteresis (UVLO)
Line Input Compensated Cycle-by-Cycle Over-current Threshold
Setting For Constant Output Power Limiting Over Universal Input
Voltage Range
Overload Protection (OLP)
Over voltage Protection (OVP)
■Pb-Free DIP-8L , DIP-7L
应用范围 返回TOP
Offline AC/DC flyback converter for
■Battery Charger
■PDA power supplies
■Digital Cameras and Camcorder Adaptor
■VCR, SVR, STB, DVD&DVCD Player SM
■Set-Top Box Power
■Auxiliary Power Supply for PC and Server
■Open-frame SMPS
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
相关芯片选择指南 返回TOP
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SSR系列 |
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|
Part No. |
Pout (Max.) |
Drive Device |
MODE |
Standby Power |
Power on Soft-Start |
OVP |
Package |
Application |
|
15W |
MOSFET |
SSR |
<0.15W |
Y |
Y |
DIP7 |
电源适配器、机顶盒电源、小家电电源 |
|
|
60W |
External MOSFET |
SSR |
<0.15W |
Y |
Y |
SOT23-6 |
电源适配器、机顶盒电源、小家电电源 |
|
