How is reverse recovery charge calculated?

How is reverse recovery charge calculated?

According to the datasheet, reverse recovery charge for the diode is QRR = 68 µC. I tried to calculate the losses with P = QRR * Vin * Fsw / 2 (it is divided by 2, because I only look at the positive half wave of my sinusoidal shaped output).

What is meant by reverse recovery charge?

Qrr or reverse recovery charge is the charge that accumulates in the PN junction of a MOSFET’s body diode when the diode is forward biased. In most applications, current flows through the body diode twice for each switching cycle, causing charge to build up.

What is reverse recovery time and how does it affect a diode?

When switching from the conducting to the blocking state, a diode or rectifier has stored charge that must first be discharged before the diode blocks reverse current. This discharge takes a finite amount of time known as the Reverse Recovery Time, or trr.

What is reverse recovery time?

Reverse recovery time is the amount of time current flows in the reverse direction when the forward current instantaneously switches directions due to residual stored charge.

What is peak reverse recovery current?

peak reverse recovery current (IRM(REC)) The maximum instantaneous value of reverse current that occurs when switching from a forward current condition to a reverse voltage condition.

What does a Schottky rectifier do?

Schottky diodes are used for their low turn-on voltage, fast recovery time and low-loss energy at higher frequencies. These characteristics make Schottky diodes capable of rectifying a current by facilitating a quick transition from conducting to blocking state.

Which diode has lowest reverse recovery time?

Schottky diodes
Schottky diodes have the lowest forward voltage drop and the shortest reverse recovery time, but they are more expensive than standard diodes and generally have a limited reverse breakdown voltage range.

How can you reduce the reverse recovery time of a diode?

faster diodes has lower reverse recovery current and shorter recovery time. If you don’t have problem in to increase losses then you can use bigger gate resistor to decrease di/dt and the spikes.

What is the reverse recovery time of a fast recovery diode?

Typical characteristics