How to prevent MOSFET failure

Post Time: Jul-29-2024

At this stage in the industry application level, the first ranked consumer electronics device adapter goods. And according to the main use of MOSFET grasp, the demand for MOSFET ranked second is the computer motherboard, NB, computer professional power adapter, LCD display and other commodities. Along with the development trend of the basic national conditions, computer motherboards, computer professional power adapters, LCD monitors on the requirements of MOSFETs have to go beyond the situation of consumer electronics adapters.

Below is the MOS invalid six major reasons.

1. Landslide invalid (operating voltage invalid), which is often referred to as the leakage between the source of the BVdss operating voltage exceeds the rated current of the MOSFET, and beyond to do a certain function which leads to invalid MOSFET.

2.SOA invalid (power flow invalid), both over the MOSFET safe operating area caused by the invalid, divided into Id over the device specifications and invalid and its Id is too large, high wear and tear of the device long-term thermal accumulation caused by the invalid.

3. Invalid body diode. In the bridge, LLC and other effective to the body diode to carry out the continuation of the network topology, because the body diode is affected by the invalidation.

4. Invalid series resonance. In the series application of the link, the gate and power supply circuit parasitic parameters lead to fluctuations caused by the invalidation.

5. Electrostatic induction is invalid. In winter and fall, because of the body and machinery and equipment due to electrostatic induction caused by the device is invalid.

6. Invalid gate voltage. Because the gate was abnormal working voltage peaks, and lead to the gate gate oxygen layer is invalid.