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IRF6646PBF Datasheet(PDF) 3 Page - International Rectifier |
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IRF6646PBF Datasheet(HTML) 3 Page - International Rectifier |
3 / 10 page IRF6646PbF www.irf.com 3 Fig 3. Maximum Effective Transient Thermal Impedance, Junction-to-Ambient 1E-006 1E-005 0.0001 0.001 0.01 0.1 1 10 100 t1 , Rectangular Pulse Duration (sec) 0.001 0.01 0.1 1 10 100 0.20 0.10 D = 0.50 0.02 0.01 0.05 SINGLE PULSE ( THERMAL RESPONSE ) Notes: 1. Duty Factor D = t1/t2 2. Peak Tj = P dm x Zthja + Tc Ri (°C/W) τi (sec) 0.678449 0.00086 17.29903 0.57756 17.56647 8.94 9.470128 106 τ J τ J τ 1 τ 1 τ 2 τ 2 τ 3 τ 3 R 1 R 1 R 2 R 2 R 3 R 3 Ci= τi/Ri Ci= τi/Ri τ τ A τ 4 τ 4 R 4 R 4 Used double sided cooling , mounting pad. Mounted on minimum footprint full size board with metalized back and with small clip heatsink. Notes: Rθ is measured at TJ of approximately 90°C. Surface mounted on 1 in. square Cu (still air). Mounted to a PCB with small clip heatsink (still air) Mounted on minimum footprint full size board with metalized back and with small clip heatsink (still air) Absolute Maximum Ratings Parameter Units PD @TA = 25°C Power Dissipation e W PD @TA = 70°C Power Dissipation e PD @TC = 25°C Power Dissipation f TP Peak Soldering Temperature °C TJ Operating Junction and TSTG Storage Temperature Range Thermal Resistance Parameter Typ. Max. Units RθJA Junction-to-Ambient em ––– 45 RθJA Junction-to-Ambient km 12.5 ––– RθJA Junction-to-Ambient lm 20 ––– °C/W RθJC Junction-to-Case fm ––– 1.4 RθJ-PCB Junction-to-PCB Mounted 1.0 ––– Linear Deratinig Factor e 0.022 270 -40 to + 150 Max. 89 2.8 1.8 |
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