Driving device and control method thereof and electronic equipment

Abstract

The invention discloses a driving device, which is used for driving a power output circuit, and comprises a first driving circuit, wherein the power output circuit comprises a first power tube, the first driving circuit is used for providing a first gate voltage to the gate electrode of the first power tube so as to control the on or off of the first power tube, the first driving circuit comprisesa charging module, a voltage detection module and a voltage source, the voltage source provides a charging voltage, the gate electrode of the first power tube is charged to a first voltage by using apower supply voltage, and when the voltage detection module detects that the first gate voltage reaches the first voltage, the charging module is controlled to be switched to charge by using the charging voltage. The invention further discloses a control method of the driving device and electronic equipment. The device is relatively low in cost.

Description

technical field [0001] The present application relates to electricity, in particular to a driving device, a control method thereof, and an electronic device. Background technique [0002] Nowadays, more and more product applications require power chips such as class-D power amplifiers and motor drivers to have high-voltage driving capabilities and provide large output power. The working voltage of devices usually needs to be above 10V. High-voltage devices with high performance and small on-resistance usually use thin gate oxide technology devices, and the normal operating voltage of the gate usually requires a low voltage (about 5V) range. Currently. In the prior art, when the lower transistor (NMOS power transistor) is turned on, the method for charging the grid of the lower transistor includes using a battery to charge the grid of the lower transistor. However, the voltage of the battery will decrease as the usage time increases, resulting in a decrease in the grid volt...

AI Technical Summary

Problems solved by technology

However, the voltage of the battery will decrease as the usage time increases, resulting in a decrease in the grid voltage of the lower end tube and an increase in the on-resistance of the lower end tube, which will affect the efficiency of power amplification and generate greater heat.

Moreover, because the battery voltage changes, the edge slope of the output signal of the Class D power amplifier will also change, which will affect the performance of the Class D power amplifier.

Images