The CXAC85171 is a high performance controller used to secondary side synchronous rectifier (SR). The fundamental of CXAC85171 is utilized N-channel MOSFET power devices used for secondary side synchronous to emulate a near-ideal diode rectifier. This method not only directly reduces power dissipation of the rectifier but also reduces primary side losses as well. The CXAC85171 is applied voltage-second balancing control method and not directly connected to the MOSFET drain, so it is ideal for flyback power supplies over the wide-output voltage range. The SR drive turn-off threshold is not related to the MOSFET RDS(on), which allows optimizing for maximum conduction time
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[ CXAC85171 ]"
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产品概述 返回TOP
CXAC85171是一款高性能二次侧同步整流控制器。CXAC85171控制NMOS以实现近乎理想二极管的特性进行整流，从而实现系统节能。CXAC85171采用伏秒平衡控制方法而不直接与MOSFET的漏端相连，可实现更宽的输出电压应用范围。CXAC85171内置系统频率检测，在极轻负载时进入待机模式。其适用于DCM、临界和CCM模式The CXAC85171 is a high performance controller used to secondary side synchronous rectifier (SR). The fundamental of CXAC85171 is utilized N-channel MOSFET power devices used for secondary side synchronous to emulate a near-ideal diode rectifier. This method not only directly reduces power dissipation of the rectifier but also reduces primary side losses as well. The CXAC85171 is applied voltage-second balancing control method and not directly connected to the MOSFET drain, so it is ideal for flyback power supplies over the wide-output voltage range. The SR drive turn-off threshold is not related to the MOSFET RDS(on), which allows optimizing for maximum conduction time. The CXAC85171 offers a frequency detector to automatically switch to standby mode during low power conditions and pin fault protections. It is compatible with DCM, TM and CCM operation
产品特点 返回TOP
•适用5V-24V系统
•伏秒平衡控制方式
•适用DCM、临界和CCM模式
•短路保护
•SOT23-6和SOP-8 封装
•符合RoHS规范及Pb-Free
Secondary-Side SR Optimized Controller for 5V to
24V Flyback Systems
Volt-Second Balance SR On-Time Control
Compatible with Primary-Side and Second-Side
Control
CCM Operation Compatibility
Short Pin Fault Protection
Available in SOP-8 and SOT23-6 Packages
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
应用范围 返回TOP
•电视、显示器、网通电源等
•其它消费电子电源。
Switching Mode Power Supply(DCM, TM and CCM)
Chargers for Smart Phones and Tablets
High Efficiency Auxiliary Power in Server
Desktop and Appliance Application
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AC/DC电源管理 |
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Part Number |
remark |
Topology |
Control Method |
Frequency (max)(kHz) |
UVLO Thresholds On/Off (V) |
Controller /Driver |
Package |
|
Synchronous Rectifier Controller |
SSR |
Volt-second Balance |
150 |
3.8/3.5 |
Controller |
SOT23-6 |
|
|
Synchronous Rectifier Controller |
SSR |
Volt-second Balance |
150 |
3.8/3.5 |
Controller |
SOT23-6 |
|
|
Synchronous Rectifier Controller |
PSR |
Volt-second Balance |
150 |
3.8/3.5 |
Controller |
SOT23-6 |
|
|
Constant-Voltage, Constant-Current Controller with Primary-Side Regulation |
PSR |
current |
100 |
22/7.8 |
Controller |
SOT23-6 |
|
|
Constant-Voltage, Constant-Current Controller |
SSR |
current |
100 |
22/6.5 |
Controller |
SOT23-6;SOP-8 |
|
