Multi-voltage supply power source conversion circuit, vehicle-mounted embedded power source and power supply system

Abstract

The invention belongs to the technical field of power supplies and provides a multi-voltage supply power source conversion circuit, a vehicle-mounted embedded power source and a power supply system. The power source conversion circuit comprises a first direct-current power source, a direct-current conversion module, a battery management module and a dual-power-source switching module; the direct-current conversion module comprises a direct-current conversion circuit and at least one diode voltage reduction circuit; when the direct-current conversion module performs voltage conversion on a first direct-current voltage to obtain a second direct-current voltage, the diode voltage reduction circuit can perform voltage reduction on the second direct-current voltage and outputs direct-current voltages with different amplitudes; the battery management module generates a third direct-current voltage through charging and discharging; and the dual-power-source switching module generates and outputs a fourth direct-current voltage according to the third direct-current voltage or the voltage output by the diode voltage reduction circuit. With the multi-voltage supply power source conversion circuit, the vehicle-mounted embedded power source and the power supply system of the invention adopted, the problem that a power supply voltage reduction circuit in the prior art cannot compatibly output working voltages with different amplitudes, is relatively low in compatibility, and is relatively high in multi-voltage power supply cost can be solved.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to a multi-voltage power supply power conversion circuit, a vehicle-mounted embedded system power supply and a vehicle-mounted power supply system. Background technique [0002] As the internal circuit structure of electronic equipment becomes more and more complex, electronic equipment usually contains multiple types of circuit units, and each type of circuit unit includes different electronic components, and different circuit circuits can also implement different circuits. function, each type of circuit unit has a different rated power supply; when the corresponding rated power is output to the circuit unit, the electronic components in each circuit unit can be driven in a safe and stable working state; however, in practice Among them, the circuit structure of different circuit units in electronic equipment is quite different, which leads to a large difference i...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a power conversion circuit for multi-voltage power supply, a vehicle-mounted embedded system power supply, and a vehicle-mounted power supply system, aiming to solve the problem that the traditional technology power step-down circuit cannot be compatible with outputting working voltages with different amplitudes, and the compatibility is poor. Multiple power step-down circuits must be used to provide corresponding rated power to multiple circuit units, resulting in high cost of multi-voltage power supply, complex circuit structure, and difficult power management of electronic equipment.

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