Linear LT3512高压绝缘反激开关电源解决方案

Linear公司的LT3512是高压单片开关稳压电源,特别为绝缘反激拓扑而设计.该电源集成了`420mA150V功率开关,高压电路和控制电路,不需要第三个绕组或光隔离器,输入电压从4.5V到100V,输出功率高达4.5W,主要应用作绝缘的通信电源,工业,汽车和医疗设备电源以及绝缘的辅助/家用电源.本文介绍了LT3512主要特性,方框图以及多种降压和升压绝缘反激转换器电路图.

The LT3512 is a high voltage monolithic switching regulator specifically designed for the isolated flyback topology.

No third winding or opto-isolator is required for regulation as the part senses output voltage directly from the primary-side flyback waveform. The device integrates a 420mA, 150V power switch, high voltage circuitry, and control into a high voltage 16-lead MSOP package with four leads removed.

The LT3512 operates from an input voltage range of 4.5V to 100V and delivers up to 4.5W of isolated output power.

Two external resistors and the transformer turns ratio easily set the output voltage. Off-the-shelf transformers are available for several applications. The high level of integration and the use of boundary mode operation results in a simple, clean, tightly regulated application solution to the traditionally tough problem of isolated power delivery.

LT3512主要特性:

4.5V to 100V Input Voltage Range

Internal 420mA, 150V Power Switch..

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