ZVS (Zero-Voltage Switching) driver module is a self-oscillating, push-pull, 300W power board that efficiently drives a center-tapped primary coil or flyback transformer at its resonant frequency, enabling high-voltage generation, arc creation, wireless power transmission, and induction heating in a single circuit.
Specification
The quick technical specification of the circuit board is given below.
| Module Type | Center-Tapped |
| Input Type | DC |
| Input Voltage Range | +15V to +30V |
| Input Current | ~10 Amp Max. |
| Input Terminal | VCC, GND |
| Output Type | Self-Oscillating, Push-Pull |
| Output Power | 300-Watt Max. |
| Output Terminal | OUT, COM, OUT |
| PCB Colour | Blue |
Circuit Diagram
Schematic of 300 watt center tapped zvs driver module circuit is shown below.
The components are used in the circuit boards are - Q1 Q2: N-Channel IRFP250N MOSFET, D1 D2: 1N4744 Zener Diode, D3 D4: UF4007 Ultra Fast Rectifier Diode, R1 R2: 470R 2W Resistor, R3 R4: 10K 1/4W Resistor, C1 C2: 0.3uF 1200V DC Polypropylene Film Capacitor, L1: 100uH 10A Toroidal Power Inductor, H1: 2-Pin Screw Terminal Connector, and H2: 3-Pin Screw Terminal Connector.
Circuit Working Explanation
The Working principle of the ZVS driver circuit is simple. The circuit operates with a DC input voltage range of 12V to 30V and can handle up to 10 Amps of current at connector (H1). An external center-tapped copper coil winding (1:1) needs to be connected to connector (H2) to start the self-oscillation, and the output power (300W Max.) is limited by inductor (L1).
The voltage divider (R1, R3) provides gate drive voltage to N-Channel MOSFET (Q1), and the Zener diode (D1) protects the gate from overvoltage. Similarly, the voltage divider (R2, R4) provides gate drive voltage to N-Channel MOSFET (Q2), and the Zener diode (D2) protects its gate.
Although resistors (R1, R2) are physically similar, but one may have slightly lower resistance in practice. Suppose resistor (R1) has lower resistance than resistor (R2).
When the circuit receives power, Q1 turns-ON immediately, allowing current to flow through inductor (L1), the center-tapped primary winding (COM to OUT1), and from Drain-Source to ground. At the same time, L1 stores electrical energy as magnetic energy. During this phase, Q2 remains OFF due to the gate is pulled low by the forward-biased diode (D3).
Current through (Q1) stops once L1 is fully energized, and the back EMF from L1 is released by the resonant circuit formed by the center-tapped winding (COM to OUT2) and the capacitor bank (C1, C2).
Next,
Q2 turns-ON, allowing current to flow through L1, the center-tapped coil (COM to OUT2), and from Drain-Source to ground. Again, L1 stores energy, and Q1's gate is pulled low by the forward-biased diode (D4), keeping it OFF.
Current through Q2 stops once L1 is fully energized again, and the back EMF from L1 is released by the resonant circuit formed by the center-tapped winding (COM to OUT1) and the capacitor bank (C1, C2).
This continuous charging and discharging of the LC tank circuit, driven by the self-oscillating push-pull switching of Q1 and Q2, generates an alternating magnetic field in the transformer's primary winding. This magnetic field can be used for high-voltage generation, induction heating, or wireless power transfer.
0 Comments: