High-voltage side driving circuit

Abstract

The invention relates to a high-voltage side driving circuit which comprises a bridge rectifier, a bootstrap capacitor, a signal generator and a latch circuit, wherein the bootstrap capacitor is coupled with a source electrode of a high-voltage side transistor; the bridge rectifier is coupled with the signal generator; the signal generator is provided with a first pulse output end and a second pulse output end, wherein the first pulse output end or the second pulse output end outputs a pulse signal after a time interval; and the latch circuit is provided with a setting end, a resetting end and an output end, wherein the setting end is coupled with the first pulse output end, the resetting end is coupled with the second pulse output end, and the output end is coupled with a gate electrode of the high-voltage side transistor.

Description

technical field [0001] The present invention relates to a driving circuit, in particular to a high voltage side driving circuit. Background technique [0002] With the rapid development of technology and the vigorous development of the electronic industry, power converters have been widely used in people's daily life, such as power supplies, motor drivers and so on. Today, many power converters use a high-side driver to control a voltage source coupled to the load. [0003] Please refer to figure 1 , which discloses an equivalent circuit diagram of a conventional high side driver. figure 1 Among them, the high-side transistor 10 is coupled to the low-side transistor 20 . When the high-side transistor 10 is turned off and the low-side transistor 20 is turned on, the capacitor 30 can be charged. On the other hand, the control transistor 45 is turned off so that the floating voltage Vcc is transmitted from the transistor 41 to the high-side transistor 10 . However, this hi...

AI Technical Summary

Problems solved by technology

However, this high-side driver is less stable in high-voltage and high-frequency applications

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