一种包含软启动电路的隔离电源芯片及软启动方法
By designing a soft-start circuit in the isolated power supply chip, sampling the VISO voltage to generate different signals, the problem of VISO voltage overshoot during power-up is solved, improving the chip's reliability and lifespan.
CN116191855BActive Publication Date: 2026-07-17BEIJING GL MICROELECTRONICS TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING GL MICROELECTRONICS TECHNOLOGY CO LTD
- Filing Date
- 2023-03-13
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing isolated DC-DC power supply chips experience VISO voltage overshoot during power-up, affecting chip reliability and lifespan.
Method used
Design an isolated power supply chip that includes a soft-start circuit. By sampling the VISO voltage, a first-level signal or a feedback square wave signal is generated. Different signals are generated according to the state of the power supply chip to prevent the oscillator from being continuously turned on during power-up and to prevent overshoot during the VISO voltage build-up process.
Benefits of technology
This effectively prevents the oscillator from remaining on during power-up, thus preventing overshoot during VISO voltage build-up and improving chip reliability and lifespan.
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Abstract
本文提供了一种包含软启动电路的隔离电源芯片及软启动方法，包括：所述反馈控制电路，采样所述VISO电压，并根据所述VISO电压生成第一电平信号或反馈方波信号；所述解码电路，根据所述第一电平信号或所述反馈方波信号，生成触发信号；所述软启动控制电路根据所述触发信号生成调节方波信号或继续沿用所述反馈方波信号，所述软启动控制电路将所述调节方波信号或反馈方波信号发送至所述信号传递电路，本文直接通过方波信号区分副边电路的欠压状态，因此，电源芯片正常工作时，在副边无需信号叠加处理，在原边也无需信号分离处理，与现有技术相比，简化信号处理复杂度，无需在电路延时及通道速率之间折中设计。
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