A controllable power supply output circuit for a vehicle and its control method

Abstract

The invention relates to a controllable power output circuit for a vehicle and a control method thereof. The controllable power output circuit comprises a power supply VCC connected with an overcurrent protection circuit, and the overcurrent protection circuit is connected with the emitter and the base of an audion Q1 in parallel; the base of Q1 is connected with the collector of an audion Q2, the base of Q2 is connected with a resistor R5, a resistor R6 and a resistor R10, R10 is connected with a reference voltage terminal VDD, R5 is connected with the emitter of Q2, the emitter of Q2 is further connected with the electrode A of a diode D1, the electrode K of D1 is connected with the electrode K of a diode D5 and the electrode A of a diode D6 through a resistor R15, and the electrode K of D6 is connected with an output voltage control terminal VIC-Con; the collector of Q1 is connected with the collector of an audion Q3; the base of Q3 is connected with a resistor R7 and a resistor R8, R8 is connected with a power supply output terminal Vout and a resistor R16 at the same time, and R6, the electrode A of D5 and R16 are grounded; R7 is connected with the emitter of Q3, the emitter of Q3 is further connected with the electrode A of a diode D7, and the electrode K of D7 is connected with the electrode K of D1. The controllable power output circuit can control voltage output and is low in power consumption.

Description

【Technical field】 [0001] The invention relates to the field of circuits, in particular to a vehicle-used controllable power supply output circuit and a control method thereof. 【Background technique】 [0002] In today's society, automobiles are becoming more and more intelligent, and there are more and more electronic controls. There are more and more corresponding controllers, and many sensors and actuators require power from the controller to achieve various operations. [0003] Correspondingly, more and more requirements need to be put forward for the port part of the controller, first of all, the power consumption problem. At present, with the diversification of functions of electronic products, various requirements lead to more complex and diverse circuits. Complexity will inevitably increase its power consumption, but current products require small size, multiple functions, and low power consumption, so the power consumption of the entire circuit must be a concern. The...

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Problems solved by technology

[0003] Correspondingly, more and more requirements need to be put forward for the port part of the controller, first of all, the power consumption problem. At present, with the diversification of functions of electronic products, various requirements lead to more complex and diverse circuits. Complexity will inevitably increase its power consumption, but current products require small size, multiple functions, and low power consumption, so the power consumption of the entire circuit must be a concern

The second is the issue of controllability. The diversity of functions requires the regulation of its key functions, opening when needed and closing when not needed; the last is the issue of safety

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