A single-cycle current control power module device

Abstract

The present invention relates to a single-cycle current control power module device, which includes a drive circuit for receiving a PWM signal and driving the power switch assembly B1 to work; and a current detection device for collecting the working current of the power switch assembly B1, the current The detection device is connected to the single-cycle current control circuit, the output terminal of the single-cycle current control circuit is connected to the driving circuit, and the input terminal of the single-cycle current control circuit receives the PWM signal; the current detection device transmits the detected working current of the power switch component B1 To a single-cycle current control circuit; the present invention can generate an overcurrent protection signal, which can immediately close and latch the switch assembly to ensure that the current in the switch assembly will not be too large. When the next PWM pulse signal arrives, it can Automatically unlock and actuate the switch assembly, allowing the power module to continue to work effectively.

Description

technical field [0001] The invention relates to a power module device, in particular to a single-cycle current control power module device, which belongs to the technical field of power module control. Background technique [0002] At present, the protection measures for traditional power modules in the market are generally sampling current output to the external control circuit, and then the external control circuit gives a protection signal to protect the power module by closing the drive circuit through the protection signal, which has the following disadvantages at: [0003] 1. The current detection device inside the power module sends an overcurrent signal to the external control circuit, and then the external control circuit judges and closes the drive circuit. This control method has a signal delay. Because the time for the overcurrent damage of the switching component to occur is very short, when an overcurrent situation occurs, the controller has not made a protect...

AI Technical Summary

Problems solved by technology

Because the time for the overcurrent damage of the switch component is very short, when the overcurrent situation occurs, the controller has not made a protective action within this signal delay time, and the switch component may have been damaged by the overcurrent

[0004] 2. The current detection device inside the power module sends an overcurrent signal. After the control circuit closes and latches the drive circuit, the shutdown and latch signals cannot be automatically restored, and the power module may stop working.

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