中图分类号：TN86 文献标志码：A DOI: 10.16157/j.issn.0258-7998.256478
中文引用格式： 王正之，许娟，董硕，等. 一种TR组件多路隔离电源加电顺序控制电路[J]. 电子技术应用，2025，51(8)：132-135.
英文引用格式： Wang Zhengzhi，Xu Juan，Dong Shuo，et al. A power-on sequence control circuit for multi-channel isolated power supplies in TR modules[J]. Application of Electronic Technique，2025，51(8)：132-135.

A power-on sequence control circuit for multi-channel isolated power supplies in TR modules

Abstract： The multi-channel DC power supplies for TR modules in phased array radar antennas require strict power-on sequencing to prevent latch-up effects and avoid high-voltage false triggering when logic circuits are not initialized. Addressing the engineering requirements for power-on sequence control of three commonly used independent non-common-ground power supplies (+28 V, +5 V, -5 V) in TR modules, this paper proposes a hierarchical control circuit based on the three-terminal voltage regulator TL431 and optocoupler isolation. The circuit achieves electrical isolation between non-common-ground power supplies through optocouplers and precisely controls the power-on timing sequence of each voltage by integrating TL431-based threshold protection circuitry. Featuring low-cost implementation and easy scalability, this solution provides an effective approach to managing power-on sequences in multi-channel independent power supply systems. It offers reliable design references for industrial equipment requiring multi-voltage power supply configurations.

Key words : multi-channel DC power supplies；power-on sequence control；transmit/receive module；isolation