STB140NF75 Datasheet, PDF (9/18 Pages) STMicroelectronics – N-CHANNEL 75V - 0.0065 ohm -120A DPAK/IPAK/TO-220 STripFET II POWER MOSFET

STB140NF75 - STP140NF75-1 - STP140NF75
Figure 17. Allowable lav vs time in avalanche
Electrical characteristics
The previous curve gives the safe operating area for unclamped inductive loads, single
pulse or repetitive, under the following conditions:
P_D(AVE) = 0.5 * (1.3 * B_VDSS * I_AV)
E_AS(AR) = P_D(AVE) * t_AV
Where:
I_AV is the allowable current in avalanche
P_D(AVE) is the average power dissipation in avalanche (single pulse)
t_AV is the time in avalanche
To derate above 25 °C, at fixed I_AV , the following equation must be applied:
I_AV = 2 * (T_jmax - T_CASE)/ (1.3 * B_VDSS * Z_th)
Where:
Z_th = K * R_th is the value coming from normalized thermal response at fixed pulse width
equal to T_AV .
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