Supertex SR10离线开关电源解决方案

Supertex公司的SR10是非隔离的电容耦合的离线开关电源稳压器,能直接从AC火线工作, 120VAC 到240VAC输入,输出电压采用内部反馈分压器可设定为6.0V,12V或24V,也可用外接电阻设定6.0V-28V,输出电流可达50mA,效率达75%,主要用在家用电器,白色家电,照明控制和三表.本文介绍了SR10主要特性,方框图, 全波和半波整流应用电路图, EMI测试电路图以及SR10评估板主要指标,电路图和材料清单.

The Supertex SR10 is a non-isolated, capacitor-coupled, switched shunt regulator designed to operate directly from the AC line. Output voltage can be either fixed at 6.0V, 12V, or 24V using an internal feedback divider or be adjusted over a 6.0V to 28V range using an external feedback divider. Output current capability is scalable to 50mA, by selection of the series coupling capacitor (CS) on the AC line. Standby power can be under 20mW, and efficiencies of 75% are possible depending upon configuration and degree of transient protection.All components except for CS are low voltage, easing PCB layout and alleviating high voltage creepage concerns.

Inherent short circuit protection is afforded by the reactance of the CS series capacitor, which limits current even with a dead short on the output. Overcurrent protection (OCP) shuts off the shunt during a line transient.

SR10主要特性:

Efficiencies up to 75% at 20mA
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