vishay siliconix si7415dn_rc document number: 73837 revision 03-mar-06 www.vishay.com 1 r-c thermal model parameters description the parametric values in the r-c thermal model have been derived using curve-fitting techniques. these techniques are described in "a simple method of generating thermal models for a power mosfet"[1] . when implemented in p-spice, these values have matching characteristic cu rves to the single pulse transient thermal impedance curves for the mosfet. r-c values for the electrical circuit in the foster/tank and cauer/filter configurations are included. note: for a detailed explanation of implementing these values in p-spice, refer to application note an609 thermal simulations of power mosfets on p-spice platform . r-c thermal model for tank configuration 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. r-c values for tank configuration thermal resistance (c/w) junction to ambient case foot rt1 4.5197 362.3679 u n/a rt2 7.4284 504.3467 m n/a rt3 11.8825 972.1139 m n/a rt4 56.6379 937.1926 m n/a thermal capacitance (joules/c) junction to ambient case foot ct1 6.7430 m 1.9260 m n/a ct2 32.7582 m 787.5516 u n/a ct3 109.4727 m 18.2079 m n/a ct4 1.1804 9.3126 m n/a
www.vishay.com 2 document number: 73837 revision 03-mar-06 vishay siliconix si7415dn_rc r-c thermal model for filter configuration note: na indicates not applicable reference: [1] "a simple method of generating thermal models for a power mo sfet" by wharton mcdaniel and kandarp pandya, ieee / semither m 2002 r-c values for filter configuration thermal resistance (c/w) junction to ambient case foot rf1 7.8647 1.8142 m n/a rf2 9.3907 670.9463 m n/a rf3 10.7274 1.0320 n/a rf4 52.6417 691.0146 m n/a thermal capacitance (joules/c) junction to ambient case foot cf1 6.1206 m 125.4667 u n/a cf2 24.0557 m 695.7232 u n/a cf3 148.5836 m 6.0783 m n/a cf4 1.1181 527.9622 u n/a
document number: 73837 revision 03-mar-06 www.vishay.com 3 vishay siliconix si7415dn_rc
|
