DN05049/D,设计说明描述了一种简单、低功耗(25W 或更低)、通用交流输入、
恒压电源,旨在为需要与
交流电源隔离且成本较低的公用电表或类似工业设备或白色家电供电高效率是必不可少的。该电源采用简单的 CCM 反激式拓扑,采用 SOT-223 封装中的新型 NCP1076/1077 系列单片开关。本设计说明提供了 5V/4A 电源的完整电路原理图详细信息和变压器设计
说明
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DN05049/D, Design Note describes a simple, low power (25W or less), universal AC input, constant voltage power supply intended for powering utility electric meters or similar industrial equipment or white goods where isolation from the AC mains is required and low cost and high efficiency is essential. The featured power supply is a simple CCM flyback topology utilizing new NCP1076/1077 series of monolithic switchers in an SOT-223 package. This Design Note provides the complete circuit schematic details and transformer design for 5V/4A power supplies
主要特色
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Conversion Type
AC to DC
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Input Voltage
85 to 270 (AC) V
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Output Voltage
5 V
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Output Current
4.5 A
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Output Power
15 to 25 W
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Efficiency
80 %
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Topology
Flyback- CCM