一般性判定方法,仅计算Conduction loss, 不考虑switching loss
Judge pass:Tmosfet < Tj
CASE TEMPERATURE T c
MOSFET DRAIN CURRENT (RMS)I D
STATIC DRAIN-SOURCE ON RESISTANCE R DS
THERMAL RESISTANCE JUNCTION-CASE MAX Rθjc
网页计算器html代码THERMAL RESISTANCE JUNCTION-AMBIENT MAX Rθja
POWER ENVIRONMENTTAL OPERATION TEMPERATURE RANGE MAX T A(MAX)
TEST AMBIENT TEMPERATURE T A
MOSFET OPERATING JUNCTION TEMPERATURE T j
T MOSFET = T A + I D^2*R DS(ON)*Rθja + T A(MAX)-T A (粗略节温度)T MOSFET
T MOSFET = T C + I D^2*R DS(ON)*Rθjc + T A(MAX)-T A (粗略节温度)T MOSFET
T CASE = T MOSFET - I D^2*R DS(ON)*Rθja T CASE
Unit IRF540NF Unit 100℃℃
28A A 0.077Ω0.077Ω
1℃/W62
62℃/W
25℃
25℃
3767.8℃0
160.37℃0
160.37℃

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