The document is about FDC6329L. It is a power MOSFET from Fairchild Semiconductor with high performance and reliability. It can operate at high temperature.
This document presents SPICE simulation results for the FDC6329L, specifically analyzing dynamic waveforms and the relationship between voltage drop (Vdrop) and load current (IL). It also includes measured dynamic waveform data for the device. The text is primarily in English, with the title containing Chinese characters.
The document details the heat flow theory applied to power MOSFETs, explaining how junction temperature is elevated by current and how thermal limits are determined. It defines steady-state junction-to-ambient thermal resistance (RθJA) and junction-to-case thermal resistance (RθJC), discussing factors affecting these values such as mounting pad size, PCB material, and leadframe design. Additionally, it describes methods for measuring transient thermal resistance using the intrinsic diode voltage and K factor calibration.
| Device Type | Power MOSFET |
|---|---|
| Thermal Resistance Formula | RθJA = ( TJ - TA ) / P |
| K Factor Approximation | 2.2mV/°C |
| PCB Conductivity | 0.29 W/m-C |
The K factor is approximately 2.2mV/°C for most Power MOSFET devices.
It is defined as the ratio of the difference between junction temperature and ambient temperature to the power applied to the device.