Control method for reducing radiation, bootstrap driving circuit, device, medium, and product

CN122932339APending Publication Date: 2026-10-16CHINA MOBILE COMM GRP TERMINAL +1
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Patent Information

Application Number
CN202610746987.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-27
Publication Date
2026-10-16

AI Technical Summary

Technical Problem

[0003]目前为了降低电源转换电路辐射骚扰的技术方案主要有:1、加屏蔽罩,通过屏蔽罩把电源电路包住,使得辐射骚扰被屏蔽掉,但是这样会增加成本,对产品的价格优势会造成影响;2、在输出节点(电源转换电路中开关模块中的MOS管开关和功率电感之间的节点)增加RC滤波电路来减弱辐射骚扰,这个方法增加了贴片焊接点,并且减弱辐射骚扰的效果不佳;3、更换电感,使得产生的辐射减小,但是修改电感值可能对输出电压的动态响应会有影响;如果更换为屏蔽型电感会增加成本,没有从根源上解决辐射问题;4、修改PCB的布局布线,把回流路径做到最小,但是需要在PCB上改版,改板后才能进行验证测试,并且仍然存在验证周期太长,导致样板费用增加等问题

Benefits of technology

[0015]本申请实施例提供的一种降低电源转换电路辐射的控制方法、自举驱动电路、设备、介质及产品,能够利用获取到的自举驱动模块中新增的目标阻抗值确定目标RC响应时长;进而控制开关模块进行延迟导通,使得开关模块中的开关缓慢导通,通过调节后的目标导通信号减少开关模块输出端由于电压变化率或电流变化率高带来的高辐射问题。通过在自举驱动模块中引入RC 响应结构,调控自举驱动模块响应时间以延缓开关模块的导通时间,从而减小开关模块输出端对应后续电路的电流变化率、电压变化率及过冲振铃幅度,实现从根源降低辐射骚扰的技术效果。

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Abstract

The application discloses a control method for reducing radiation, a bootstrap driving circuit, equipment, a medium and a product. The method is applied to a power conversion circuit and comprises the following steps: obtaining a target impedance value newly added in a bootstrap driving module; determining a target RC response time length based on the target impedance value; performing delay turn-on control on a switch module by using the target RC response time length to obtain a target conduction signal of the switch module; and reducing the change rate of an electric signal input to a rectification filtering module according to the target conduction signal, so that the radiation value received by the rectification filtering module is reduced. According to the embodiment of the application, the RC response structure is introduced, the response time of the bootstrap driving module is regulated and controlled, and the turn-on time of the switch module is delayed, so that the current change rate, the voltage change rate and the overshoot ringing amplitude of the subsequent circuit are reduced, and the technical effect of reducing the radiation disturbance from the root is realized.
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