IRF614 SiHF614 AN609 - Datasheet Archive

 

Vishay Siliconix R-C Thermal Model Parameters DESCRIPTION The parametric values in the R-C thermal model have been derived using

 

IRF614 IRF614_RC, SiHF614 SiHF614_RC 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 P-SPICE, 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 P-SPICE simulation to evaluate the thermal behavior of the MOSFET junction temperature under a defined power profile. These techniques are described in application note AN609 AN609, "Thermal Simulation of Power MOSFETs on the P-SPICE Platform". R-C THERMAL MODEL FOR TANK CONFIGURATION T (Junction) RT1 RT2 RT3 RT4 CT1 CT2 CT3 T (Ambient) CT4 R-C VALUES FOR TANK CONFIGURATION THERMAL RESISTANCE (°C/W) Junction to Ambient Case Foot RT1 N/A 949.2671 m N/A RT2 N/A 693.3273 m N/A RT3 N/A 1.6647 N/A RT4 N/A 192.7056 m N/A Junction to Ambient Case Foot CT1 N/A 111.6851 m N/A CT2 N/A 3.4871 m N/A CT3 N/A 7.4028 m N/A CT4 N/A 545.4332 u N/A THERMAL CAPACITANCE (Joules/°C) 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. Document Number: 90241 Revision: 09-Mar-10 www.vishay.com 1 IRF614 IRF614_RC, SiHF614 SiHF614_RC Vishay Siliconix R-C THERMAL MODEL FOR FILTER CONFIGURATION T (Junction) RF2 RF1 CF1 CF2 RF3 RF4 T (Ambient) CF4 CF3 GND R-C VALUES FOR FILTER CONFIGURATION THERMAL RESISTANCE (°C/W) Junction to Ambient Case RF1 N/A 336.4663 m Foot N/A RF2 N/A 1.0002 N/A RF3 N/A 1.4760 N/A RF4 N/A 687.3337 m N/A THERMAL CAPACITANCE (Joules/°C) Junction to Ambient Case Foot CF1 N/A 522.5130 u N/A CF2 N/A 1.8041 m N/A CF3 N/A 5.6295 m N/A CF4 N/A 159.1981 m N/A Note N/A indicates not applicable www.vishay.com 2 Document Number: 90241 Revision: 09-Mar-10 IRF614 IRF614_RC, SiHF614 SiHF614_RC Vishay Siliconix Document Number: 90241 Revision: 09-Mar-10 www.vishay.com 3