mos管IRF3205占空比问题(请求大侠帮助!)

zsk001

mos管IRF3205占空比问题(请求大侠帮助!) [复制链接]

IRF3205使用问题
请求大侠帮助!
数据手册上说不能超过20%(原文中NOTES:第四条),请问是真的吗?
如果不是,应该怎样理解?


原文如下

Notes:
1.Repetitive rating;  pulse width limited by max. junction temperature. ( See fig. 11 )
2. Starting TJ = 25°C, L = 138?H,G = 25?, IAS = 62A. (See Figure 12)
3.ISD ≤ 62A, di/dt ≤ 207A/?s, VDD ≤ V(BR)DSS,TJ ≤ 175°C
4. Pulse width ≤ 400?s; duty cycle ≤ 2%.
5.Calculated continuous current based on maximum allowable
     junction temperature. Package limitation current is 75A.
6.This is a typical value at device destruction and represents operation outside rated limits.
7.This is a calculated value limited to TJ = 175°C.

附上数据手册 原文链接   www.datasheetcatalog.org/datasheet/irf/irf3205.pdf

niuqingjun

这是测试极限电流时给出的条件吧?

实用中电流远达不到极限电流,也就没有那样的占空比限制.