Si7390DP_RC www.vishay.com Vishay Siliconix R-C Thermal Model Parameters DESCRIPTION The parametric values in the R-C thermal model have been derived using curve-fitting techniques. R-C values for the electrical circuit in the Foster/tank and Cauer/filter configurations are included. When implemented in PSpice, these values have matching characteristic curves to the single-pulse transient thermal impedance curves for the MOSFET. These RC values can be used in the PSpice simulation to evaluate the thermal behavior of the MOSFET junction temperature under a defined power profile. These techniques are described in application note AN609, “Thermal Simulation of Power MOSFETs on the PSpice Platform”. R-C THERMAL MODEL FOR TANK CONFIGURATION T (Junction) RT1 RT2 RT3 RT4 CT1 CT2 CT3 CT4 T (Ambient) R-C VALUES FOR TANK CONFIGURATION THERMAL RESISTANCE (°C/W) Junction to Ambient Case RT1 2.0964 18.1043u Foot n/a RT2 9.0489 711.4848m n/a RT3 8.0177 1.3099 n/a RT4 50.6167 1.1888 n/a Junction to Ambient Case CT1 24.2346m 81.2329u n/a CT2 558.4598m 674.3100u n/a CT3 70.7118m 14.2244m n/a CT4 1.4427 6.7181m n/a THERMAL CAPACITANCE (Joules/°C) Foot Note • n/a indicates not applicable This document is intended as a SPICE modeling guideline and does not constitute a commercial product datasheet. Designers should refer to the appropriate datasheet of the same number for guaranteed specification limits. Revision: 26-May-15 1 Document Number: 73612 THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Si7390DP_RC www.vishay.com Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION T (Junction) RF2 RF1 CF1 RF3 CF2 RF4 T (Ambient) CF4 CF3 GND R-C VALUES FOR FILTER CONFIGURATION THERMAL RESISTANCE (°C/W) Junction to Ambient Case RF1 6.2277 64.6207m Foot n/a RF2 7.9322 842.6365m n/a RF3 7.6428 1.2521 n/a RF4 47.9015 1.0208 n/a Junction to Ambient Case Foot CF1 16.9227m 211.8576u n/a CF2 156.4462m 396.2589u n/a CF3 2.8690m 4.9103m n/a CF4 1.2888 306.6355u n/a THERMAL CAPACITANCE (Joules/°C) Note • n/a indicates not applicable Revision: 26-May-15 2 Document Number: 73612 THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Si7390DP_RC www.vishay.com Revision: 26-May-15 Vishay Siliconix 3 Document Number: 73612 THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000