High-voltage surge suppression circuit
A surge suppression circuit, high voltage technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. It can reduce the stress and temperature rise, reduce the cost of components, and avoid burning.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0030] A high-voltage surge suppression circuit, including a power supply, a voltage stabilization control circuit, a first switching tube and a second switching tube; the first switching tube and the second switching tube are provided with a drain, a source and a gate; the first The switch tube is connected in series with the second switch tube, the power supply includes an input terminal and an output terminal, the input terminal is connected to the drain of the first switch tube, and the output terminal is connected to the source of the second switch tube; the grid of the first switch tube and the The gates of the second switching tubes are respectively connected to bootstrap drive circuits;
[0031] The voltage stabilizing control circuit includes a first voltage stabilizing tube, a second voltage stabilizing tube, a first capacitor, a second capacitor and a triode, the base of the triode is connected to a voltage dividing resistor; the first voltage stabilizing tube and th...
Embodiment 2
[0033] see image 3 and Figure 4 , the first power switch tube Q1 and the second power switch tube Q2 are connected in series to the input bus, the drain of the first power switch tube Q1 is connected to the input terminal Vin of the circuit, and the source of the second power switch tube Q2 is connected to the output of the circuit The terminal Vout, the gates of the first power switching transistor Q1 and the second power switching transistor Q2 are respectively connected to corresponding bootstrap driving circuits, and the bootstrap driving circuits are affected by the voltage stabilizing control circuit.
[0034] The voltage stabilizing control circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first voltage regulator tube Z1, a second voltage regulator tube Z2, and a second voltage regulator tube Z2. The second capacitor C2, the third capacitor C3, and the transistor Q3. The...
Embodiment 3
[0036] Such as Figure 5As shown, at this time, the maximum output voltage of the circuit is 50V, and it needs to withstand the maximum surge voltage of 100V / 50ms (0.5Ω). In the regulator control circuit, the first regulator Z1 and the second regulator Z2 use regulator diodes with a breakdown voltage of 36V, and the voltage at point A is designed to be 8V. The bootstrap drive circuit is mainly composed of an oscillation circuit, a pump capacitor and a rectifier circuit, where C7 is a filter capacitor, R9 is a pull-up resistor, the Ref and RC signals are output by the PWM controller in the circuit, and the Ref reference level is passed through resistors R7 and R8 After the voltage is divided, it is compared with the RC triangle wave, so that the comparator U1 outputs a square wave signal, which is pumped by capacitor C6 and D1 to a higher level square wave signal, rectified by diode D2, D3, filtered by capacitor C4, C5, and resistor R10 , R11 current limiting, voltage regulato...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More