2results about How to "Raise the voltage difference" patented technology

A surge protection circuit and an electronic device, the surge protection circuit comprising a first signal line, a second signal line, a first overvoltage protection module, a second overvoltage protection module, a third overvoltage protection module and a first voltage divider module. The first overvoltage protection module can take the voltage of the signal ground as a reference, release the surge current on the first signal line and the second signal line to the signal ground, limit the upper limit of the voltage of the first signal line and the second signal line, and the second overvoltage protection module and the third overvoltage protection module can avoid the voltage difference between the first signal line and the second signal line being too large, and further release the differential mode surge current on the first signal line and the second signal line. The first voltage divider module is arranged between the second overvoltage protection module and the third overvoltage protection module, which can avoid the excessively high voltage between the two ends of the second overvoltage protection module from affecting the protected module.

This application provides a driving circuit, a driving chip, and a motor driving device. The driving circuit includes a full-bridge unit, a switching unit, and a driving unit. The first terminal of the switching unit is electrically connected to a first power supply, the second terminal of the switching unit is electrically connected to the first terminal of a first energy storage unit, and the third terminal of the switching unit is electrically connected to the power supply terminal of the driving unit and the first terminal of the second energy storage unit. The source of the target upper transistor in the full-bridge unit is electrically connected to the second terminal of the first energy storage unit. The second terminal of the second energy storage unit and the drains of all upper transistors in the full-bridge unit are electrically connected to the second power supply. The sources of all upper transistors and the drains of all lower transistors in the full-bridge unit are correspondingly electrically connected, and the sources of all lower transistors in the full-bridge unit are grounded. Multiple signal output terminals of the driving unit are correspondingly electrically connected to the control terminal of the switching unit, the gates of all upper transistors and the gates of all lower transistors in the full-bridge unit, which can solve the problem of high on-resistance of the upper transistors in the full-bridge circuit.