How to Quickly Select and Apply MOS Tubes (3) — SUNMATE

The next step in choosing MOS tubes is fragmented heat dissipation requests

Two different situations need to be considered, namely the worst-case and the actual situation. Propose adopting a plan that focuses on the worst-case consequences, as a certain consequence requires a greater insurance margin to ensure that the fragments will not take effect. There are some measurement data that need to be noted on the material list of MOS tubes; The junction temperature of the component is equal to the product of the maximum conditional measure plus thermal resistance and power dissipation (junction temperature=maximum conditional measure+thermal resistance × Power dissipation. According to a certain formula, the maximum power dissipation of fragments can be solved, which is defined as the same as I2 × RDS (ON). We are about to pass through the maximum direct current of the machine and can plan to produce RDS (ON) without the same magnitude. In addition, it is necessary to manage the access board well

The heat dissipation of its MOS tube.

Landslide breakdown refers to the phenomenon where the reverse voltage on a semi superconducting component exceeds its maximum value and creates a strong magnetic field that increases the direct current inside the component. The increase in chip size will enhance the power of wind collapse prevention and ultimately improve the stability of the components. Therefore, choosing larger packages can effectively prevent landslides.