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IRFR7440PBF Datasheet(PDF) 8 Page - International Rectifier |
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IRFR7440PBF Datasheet(HTML) 8 Page - International Rectifier |
8 / 12 page IRFR7440PbF/IRFU7440PbF 8 www.irf.com © 2015 International Rectifier Submit Datasheet Feedback January 6, 2015 Fig 24a. Switching Time Test Circuit Fig 24b. Switching Time Waveforms Fig 23b. Unclamped Inductive Waveforms Fig 23a. Unclamped Inductive Test Circuit tp V(BR)DSS IAS RG IAS 0.01 Ω tp D.U.T L VDS + - VDD DRIVER A 15V 20V VGS Fig 25a. Gate Charge Test Circuit Fig 25b. Gate Charge Waveform Vds Vgs Id Vgs(th) Qgs1 Qgs2 Qgd Qgodr Fig 22. Peak Diode Recovery dv/dt Test Circuit for N-Channel HEXFET® Power MOSFETs Circuit Layout Considerations • Low Stray Inductance • Ground Plane • Low Leakage Inductance Current Transformer P.W. Period di/dt Diode Recovery dv/dt Ripple ≤ 5% Body Diode Forward Drop Re-Applied Voltage Reverse Recovery Current Body Diode Forward Current VGS=10V VDD ISD Driver Gate Drive D.U.T. ISD Waveform D.U.T. VDS Waveform Inductor Curent D = P.W. Period * VGS = 5V for Logic Level Devices * + - + + + - - - RG VDD • dv/dt controlled by RG • Driver same type as D.U.T. • ISD controlled by Duty Factor "D" • D.U.T. - Device Under Test D.U.T Inductor Current D.U.T. VDS ID IG 3mA VGS .3 μF 50K Ω .2 μF 12V Current Regulator Same Type as D.U.T. Current Sampling Resistors + - VDS 90% 10% VGS td(on) tr td(off) tf VDS Pulse Width ≤ 1 µs Duty Factor ≤ 0.1 % RD VGS RG D.U.T. 10V + - VDD VGS |
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