Thermal Design & Runaway
Prevent smoke. Estimate conduction vs switching loss of a MOSFET and predict junction temperatures under ambient load.
1. Transistor Metrics
on-resistance [R_ds(on)] 15 mΩ
switching time [t_sw] 25 ns
2. Environment & Load
load current [I_load] 10 A
drain voltage [V_ds] 24 V
thermal resistance [θ_JA] 40 °C/W
ambient temp [T_amb] 25 °C
Conduction Loss —
Switching Loss —
Total Power Loss —
Junction Temp —
⚠️
Silicon Thermal Over-temperature!
MOSFET junction temperature exceeds the maximum limits (150°C). Silicon will melt without active heatsinks or cooling!
Junction Thermal Rise Bar
Junction Temp (T_j)
—
Rise (Delta T)
—
Thermal State
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