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Low-voltage DC power supply driver power source anti-reverse-connection circuit based on PMOS transistor

A power supply anti-reverse connection, low-voltage direct current technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problem of no capacitive soft-start protection, etc., and achieve the effect of simple and reliable control, easy implementation, and wide application range

Pending Publication Date: 2019-08-06
SHANGHAI ANPU MINGZHI AUTOMATION EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention protects the circuit with as little power consumption as possible; the protection circuit can pass a large current; it can resist high-intensity surge interference; Use a Zener diode for the V of the MOS tube GS clamp protection

Method used

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  • Low-voltage DC power supply driver power source anti-reverse-connection circuit based on PMOS transistor
  • Low-voltage DC power supply driver power source anti-reverse-connection circuit based on PMOS transistor
  • Low-voltage DC power supply driver power source anti-reverse-connection circuit based on PMOS transistor

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0022] Such as figure 1 As shown, a low-voltage DC power supply driver power supply anti-reverse circuit based on PMOS transistors, through which the switch-type drive load is prevented from being turned on when the power supply is reversed, including: PMOS transistor Q0, Zener diode ZD1, and first resistor R1 , the second resistor R2 and the capacitor C1, the drain pin 2 of the PMOS transistor Q0 is connected to the positive pole of the power supply, the source pin 3 of the PMOS transistor Q0 is respectively connecte...

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Abstract

The invention relates to a low-voltage DC power supply driver power source anti-reverse-connection circuit based on a PMOS transistor, whereby the reverse through short circuit of a switch-type driving load is avoided when a power source is reversely connected. The anti-reverse-connection circuit includes a PMOS transistor, a voltage stabilizing diode, a first resistor, a second resistor and a capacitor, wherein the drain of the PMOS transistor is connected to the positive pole of the power source; the source of the PMOS transistor is connected to the cathode of the voltage stabilizing diode,one end of the first resistor, one end of the capacitor and one end of the switch-type driving load; the gate of the PMOS transistor is connected to the anode of the voltage stabilizing diode, the other end of the first resistor, the other end of the capacitor and one end of the second resistor; the other end of the second resistor is connected to the negative side of the power source and the other end of the switch-type driving load. Compared with the prior art, the low-voltage DC power supply driver power source anti-reverse-connection circuit is easy and reliable to control, easy to implement, low in cost and the like.

Description

technical field [0001] The invention relates to the field of motor driver power supply, in particular to a PMOS transistor-based low-voltage direct current power supply driver power supply anti-reverse connection circuit. Background technique [0002] The motor drive has been widely used in various automatic control fields. Its high efficiency and precise control in the control system make it widely used in various fields such as industry, security, medical treatment, transportation, aerospace, military and so on. It has become an important part of national life and production. Inseparable important part. For all drive schemes and drive products, the same issue needs to be considered - the issue of safe power supply. Because there are two power lines in the actual application of the motor driver, one is positive and the other is negative. In practical applications, it is inevitable that the power lines will be reversed, so it is particularly important to consider the anti-r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H11/00
CPCH02H11/003
Inventor 傅春涛
Owner SHANGHAI ANPU MINGZHI AUTOMATION EQUIP
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