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| SPICE Device Model SI7446DP Vishay Siliconix 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 125C 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 125C temperature ranges under the pulsed 0 to 5V 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 Cgd 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 This document is intended as a SPICE modeling guideline and does not constitute a commercial product data sheet. Designers should refer to the appropriate data sheet of the same number for guaranteed specification limits. Document Number: 71720 24-May-04 www.vishay.com 1 SPICE Device Model SI7446DP Vishay Siliconix SPECIFICATIONS (TJ = 25C UNLESS OTHERWISE NOTED) Parameter Static Gate Threshold Voltage On-State Drain Currenta Drain-Source On-State Resistancea Forward Transconductancea Diode Forward Voltagea VGS(th) ID(on) rDS(on) gfs VSD VDS = VGS, ID = 250 A VDS 5 V, VGS = 10 V VGS = 10 V, ID = 19 A VGS = 4.5 V, ID = 17 A VDS = 15 V, ID = 19 A IS = 4.3 A, VGS = 0 V 1.89 759 0.0061 0.0086 55 0.83 V A S V Symbol Test Conditions Typical Unit Dynamicb Total Gate Chargeb Gate-Source Chargeb Gate-Drain Chargeb Turn-On Delay Timeb Rise Timeb Turn-Off Delay Timeb Fall Time b Qg Qgs Qgd td(on) tr td(off) tf trr IF = 2.3 A, di/dt = 100 A/s VDD = 15 V, RL = 15 ID 1A, VGEN = 10 V, RG = 6 VDS = 15 V, VGS = 5 V, ID = 19 A 36 14 12 18 37 39 108 49 ns nC Source-Drain Reverse Recovery Time Notes a. Pulse test; pulse width 300 s, duty cycle 2%. b. Guaranteed by design, not subject to production testing. www.vishay.com 2 Document Number: 71720 24-May-04 SPICE Device Model SI7446DP Vishay Siliconix COMPARISON OF MODEL WITH MEASURED DATA (TJ=25C UNLESS OTHERWISE NOTED) Document Number: 71720 24-May-04 www.vishay.com 3 |
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