The invention belongs to the technical field of automobile power supply, and discloses a vehicle-mounted 24V power supply circuit and a power supply system, the circuit comprises a primary step-down unit, the input end of the primary step-down unit is connected with a filtered + 24V power supply, the output end of the primary step-down unit outputs a step-down voltage to be connected with an LDO power supply unit, and the output end of the LDO power supply unit outputs a startup voltage to be connected to a VCCSOC of a cabin host; after the cabin host is started, a high-level enable signal is output to the enable unit for DC/DC voltage reduction power supply; the filtered + 24V power supply is further connected to the DC/DC voltage reduction power supply unit, and the output end of the DC/DC voltage reduction power supply unit is connected with the USB5V power supply protection unit and the cabin host VCCSOC. According to the scheme of the invention, discrete electronic components and common chips with low unit price are adopted, so that the total cost is reduced. And by optimizing the circuit design, unnecessary elements and complexity are reduced, the cost is further reduced, and the functionality and reliability of the circuit are ensured at the same time.
本发明属于汽车供电技术领域,公开了一种车载24V供电电路及供电系统,所述电路包括一级降压单元的输入端连接滤波后的+24V电源,输出端输出降压电压连接LDO电源供电单元,LDO电源供电单元的输出端输出开机电压连接到座舱主机的VCC_SOC,座舱主机启动后输出高电平的使能信号到DC/DC降压供电的使能单元;滤波后的+24V电源还连接到DC/DC降压供电单元,DC/DC降压供电单元输出端连接USB5V供电保护单元和座舱主机VCC_SOC。本发明的方案采用了分立电子元器件和单价便宜的常用芯片,从而降低了总体成本。通过优化电路设计,减少不必要的元件和复杂度,进一步降低了成本,同时保证了电路的功能性和可靠性。
Vehicle-mounted 24V power supply circuit and power supply system
一种车载24V供电电路及供电系统
2024-09-03
Patent
Electronic Resource
Chinese
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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