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STB140NF75 Datasheet(PDF) 9 Page - STMicroelectronics |
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STB140NF75 Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 18 page STB140NF75 - STP140NF75-1 - STP140NF75 Electrical characteristics 9/18 The previous curve gives the safe operating area for unclamped inductive loads, single pulse or repetitive, under the following conditions: PD(AVE) = 0.5 * (1.3 * BVDSS * IAV) EAS(AR) = PD(AVE) * tAV Where: IAV is the allowable current in avalanche PD(AVE) is the average power dissipation in avalanche (single pulse) tAV is the time in avalanche To derate above 25 °C, at fixed IAV , the following equation must be applied: IAV = 2 * (Tjmax - TCASE)/ (1.3 * BVDSS * Zth) Where: Zth = K * Rth is the value coming from normalized thermal response at fixed pulse width equal to TAV . Figure 17. Allowable lav vs time in avalanche |
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