通信系统中二次电源电路的滤波与缓启

Filtering and Slowly-start Circuits for Secondary Power Supply in Communication System

稳定可靠的电源,在低电压、高工作频率、大功耗等通信系统中至关重要。论述了在通信系统二次电源电路中DC/DC电源变换模块前置电路的滤波保护电路,以及采用集中供电方式中各个单板对输入电源的缓启电路。实测结果表明上述电路可以显著抑止电源纹波以及单板拔插时的浪涌电流,提高电源系统的稳定性,电路在通信系统中具有广泛的应用价值。

The stable and reliable power supply in communications systems that have low working voltage, high operating frequency and high power dissipation is important. A filtering circuit before the DC/DC module in secondary power supply is introduced, which can improve the power＇s stableness. A surge current could destroy the components and devices when the PCB board is pulled out and inserted, a slowly-start circuit that can remarkably restrain the power supply ripple and surge current is also introduced. The actual result indicates the above circuits work well and can be used widely in communications system.