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中文摘要：
针对便携式医疗康复设备领域中电池供电、高隔离度和高电压输出的要求,设计了一款新型低输入电压供电、双路高压输出隔离的开关电源。该设计采用锂电池供电,采用基于占空比〈50%的电流型脉宽调制控制芯片UC3845的反激拓扑结构和光耦反馈网络电路,实现双路隔离正负高压电源输出。电源输入电压为10～14 V,输出电压为双通道＋35/-35 V隔离,功率为14 W,效率是75%,电源模块面积为65 mm×40 mm。仿真与实际测试结果表明,该电源可实现正负高压电源隔离输出。
英文摘要：
A new low-cost isolated flyback switch Li-battery power supply is designed for battery-powered medical instruments with high voltage and isolated function. The chip with current type of pulse width modulation（ PWM） UC3845 and a feedback circuit are used to realize the isolate and dual-output function. The input of the designed power is 10 ～ 14 V and the dual-output are ＋ 35 V and- 35 V. The consumed power is 14 W with an efficiency of 75%. The size of the module is 65 mm × 40 mm. The simulation and experiment results validate that the power supply module can realize the ± 35 V power isolated supply.
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