vishay siliconix si7136dp_rc document number: 73741 revision 16-jan-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 2.0963 2.3554 m n/a rt2 9.0488 690.6627 m n/a rt3 8.0177 1.6922 n/a rt4 50.6165 820.2806 m n/a thermal capacitance (joules/c) junction to ambient case foot ct1 24.2344 m 136.5785 u n/a ct2 558.7573 m 595.8486 u n/a ct3 70.7495 m 9.9128 m n/a ct4 1.4435 8.8712 m n/a
www.vishay.com 2 document number: 73741 revision 16-jan-06 vishay siliconix si7136dp_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 5.3871 657.3010 u n/a rf2 10.2337 1.0857 n/a rf3 17.6421 1.1764 n/a rf4 36.7131 935.2605 m n/a thermal capacitance (joules/c) junction to ambient case foot cf1 15.7961 m 388.4781 u n/a cf2 98.5875 m 322.0178 u n/a cf3 538.0285 m 5.2085 m n/a cf4 1.3275 2.4604 m n/a
document number: 73741 revision 16-jan-06 www.vishay.com 3 vishay siliconix si7136dp_rc
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