spice device model si7840dp vishay siliconix this document is intended as a spice modeling guideline and does not constitute a commercial product data sheet. designers sho uld refer to the appropriate data sheet of the same number for guaranteed specification limits. document number: 70671 www.vishay.com 30-aug-01 1 n-channel 30-v (d-s) fast switching mosfet characteristics ? n-channel vertical dmos ? macro model (subcircuit model) ? level 3 mos ? apply for both linear and switching application ? accurate over the ? 55 to 125 c temperature range ? model the gate charge, transient, and diode reverse recovery characteristics description the attached spice model describes the typical electrical characteristics of the n-channel vertical dmos. the subcircuit model is extracted and optimized over the ? 55 to 125 c temperature ranges under the pulsed 0-to-10v gate drive. the saturated output impedance is best fit at the gate bias near the threshold voltage. a novel gate-to-drain feedback capacitance network is used to model the gate charge characteristics while avoiding convergence difficulties of the switched c g d model. all model parameter values are optimized to provide a best fit to the measured electrical data and are not intended as an exact physical interpretation of the device. subcircuit model schematic
spice device model si7840dp vishay siliconix www.vishay.com document number: 70671 2 30-aug-01 specifications (t j = 25 c unless otherwise noted) parameter symbol test condition simulated data measured data unit static gate threshold voltage v gs(th) v ds = v gs , i d = 250 a 1.2 v on-state drain current a i d(on) v ds 5v, v gs = 10v 529 a v gs = 10v, i d = 18a 0.0076 0.0077 drain-source on-state resistance a r ds(on) v gs = 4.5v, i d = 15a 0.0115 0.0115 ? forward transconductance a g fs v ds = 15v, i d = 18a 43 40 s diode forward voltage a v sd i s = 4.1a, v gs = 0v 0.75 0.75 v dynamic b total gate charge q g 15.4 15.5 gate-source charge q gs 3.8 3.8 gate-drain charge q gd v ds = 15v, v gs = 5v, i d = 18a 66 nc turn-on delay time t d(on) 14 17 rise time t r 19 14 turn-off delay time t d(off) 36 39 fall time t f v dd = 15v, r l = 15 ? i d ? 1a, v gen = 10v, r g = 6 ? 62 19 source-drain reverse recovery time t rr i f = 4.1a, di/dt = 100 a/ s 45 50 ns notes a. pulse test; pulse width 300 s, duty cycle 2%. b. guaranteed by design, not subject to production testing.
spice device model si7840dp vishay siliconix document number: 70671 www.vishay.com 30-aug-01 3 comparison of model with measured data (t j =25 c unless otherwise noted)
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