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MBRM140 Datasheet(PDF) 4 Page - ON Semiconductor |
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MBRM140 Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 8 page MBRM140 http://onsemi.com 4 Ipk/Io = 5 Figure 5. Current Derating Figure 6. Forward Power Dissipation TL, LEAD TEMPERATURE (°C) IO, AVERAGE FORWARD CURRENT (AMPS) 0.2 0 1.0 0.6 0.5 0.3 0.1 0 1.0 0.4 0.8 1.2 1.6 0.4 SQUARE WAVE dc Ipk/Io = p Ipk/Io = 10 Ipk/Io = 20 0.6 1.4 0.2 0.7 0.8 0.9 45 75 25 1.8 1.2 1.0 0.8 0.2 0 55 115 105 1.4 125 1.6 Ipk/Io = 20 Ipk/Io = 10 Ipk/Io = 5 Ipk/Io = p SQUARE WAVE dc 0.6 0.4 FREQ = 20 kHz 35 65 85 95 Figure 7. Capacitance Figure 8. Typical Operating Temperature Derating* 30 0 VR, REVERSE VOLTAGE (VOLTS) 1000 100 10 VR, DC REVERSE VOLTAGE (VOLTS) 15 40 0 115 95 85 75 15 5.0 10 20 25 20 25 5.0 10 105 125 * Reverse power dissipation and the possibility of thermal runaway must be considered when operating this device under any re- verse voltage conditions. Calculations of TJ therefore must include forward and reverse power effects. The allowable operating TJ may be calculated from the equation: TJ = TJmax - r(t)(Pf + Pr) where r(t) = thermal impedance under given conditions, Pf = forward power dissipation, and Pr = reverse power dissipation This graph displays the derated allowable TJ due to reverse bias under DC conditions only and is calculated as TJ = TJmax - r(t)Pr, where r(t) = Rthja. For other power applications further calculations must be performed. Rtja = 33.72°C/W 51 °C/W 83.53 °C/W 96 °C/W TJ = 25°C 40 35 30 35 69 °C/W |
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