A Power Transistor Gate Drive Circuit with Segment Drive Function
A gate drive circuit and segmental drive technology, which is applied in the direction of output power conversion device, DC power input conversion to DC power output, electrical components, etc., can solve the problem of high gate charging current, difficult implementation, and segmental drive Complex structure and other issues, to achieve the effect of reducing circuit complexity and simple implementation
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[0041] The specific implementation manner and principle of the present invention will be further elaborated below in conjunction with the drawings.
[0042] The present invention proposes a gate drive circuit for driving N-type power tubes, which is suitable for DC-DC converters and can be used to drive high-side power tubes or low-side power tubes of DC-DC converters. When the power tube is used, the power rail of the gate drive circuit is the high-side floating power rail (BST-SW) of the DC-DC converter, and the relatively high level of the high-side floating power rail is the floating power supply BST of the DC-DC converter. The relatively low level of the side floating power rail is the level at the switch node SW of the DC-DC converter; when driving the low-side power tube, the power rail of the gate drive circuit is the low-side power rail of the DC-DC converter ( VDD-GND), the relatively high level of the low-side floating power supply rail is the internal low-voltage p...
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