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3 SPICE Device Model SI7943DP Vishay Siliconix Dual P-Channel 30-V (D-S) MOSFET CHARACTERISTICS * P-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 p-channel vertical DMOS. The subcircuit model is extracted and optimized over the -55 to 125C 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 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: 70699 31-May-04 www.vishay.com 1 SPICE Device Model SI7943DP Vishay Siliconix SPECIFICATIONS (TJ = 25C UNLESS OTHERWISE NOTED) Parameter Static Gate Threshold Voltage On-State Drain Current a Symbol Test Conditions Simulated Data 1.1 235 0.020 0.024 0.036 23 -0.81 Measured Data Unit VGS(th) ID(on) rDS(on) VDS = VGS, ID = -250 A VDS = -5 V, VGS = -10 V VGS = -10 V, ID = -9.4 A VGS = -4.5 V, ID = -8.6 A VGS = -2.5 V, ID = -3 A V A 0.020 0.024 0.037 15 -0.80 S V Drain-Source On-State Resistancea Forward Transconductancea Diode Forward Voltage a gfs VSD VDS = -15 V, ID = -9.4 A IS = -2.9 A, VGS = 0 V Dynamic b Total Gate Charge Gate-Source Charge Gate-Drain Charge Turn-On Delay Time Rise Time Turn-Off Delay Time Fall Time Source-Drain Reverse Recovery Time Qg Qgs Qgd td(on) tr td(off) tf trr IF = -2.9 A, di/dt = 100 A/s VDD = -15 V, RL = 15 ID -1 A, VGEN = -10 V, RG = 6 VDS = -15 V, VGS = -4.5 V, ID = -9.4 A 25 8.5 5 17 22 53 73 47 23.5 8.5 5 18 40 100 60 50 ns nC 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: 70699 31-May-04 3 SPICE Device Model SI7943DP Vishay Siliconix COMPARISON OF MODEL WITH MEASURED DATA (TJ=25C UNLESS OTHERWISE NOTED) Document Number: 70699 31-May-04 www.vishay.com 3 |
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