Si7884DP-RC

Si7884DP_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. 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 curves 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
R-C VALUES FOR TANK CONFIGURATION
Thermal Resistance (°C/W)
Foot
Junction to
Ambient
Case
RT1
3.2817
72.1046 m
N/A
RT2
11.9526
927.9036 m
N/A
RT3
14.8374
387.7305 m
N/A
RT4
34.6359
412.3045 m
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
21.5367 m
5.3840 u
N/A
CT2
122.6730 m
14.7376 m
N/A
CT3
2.7978
46.2715 m
N/A
CT4
2.1250
9.7722 m
N/A
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: 73756
Revision 19-Jan-06
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Si7884DP_RC
Vishay Siliconix
R-C THERMAL MODEL FOR FILTER CONFIGURATION
R-C VALUES FOR FILTER CONFIGURATION
Thermal Resistance (°C/W)
Foot
Junction to
Ambient
Case
RF1
2.9560
99.1476 m
N/A
RF2
11.2928
1.3512
N/A
RF3
14.8335
250.9355 m
N/A
RF4
35.4453
100.2525 m
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
13.8361 m
346.3338 u
N/A
CF2
68.6573 m
5.3726 m
N/A
CF3
518.5476 m
39.3974 m
N/A
CF4
1.1877
27.2385 m
N/A
Note: NA indicates not applicable
Reference:
[1] "A Simple Method of Generating Thermal Models for a Power MOSFET" by Wharton McDaniel and Kandarp Pandya, IEEE / SEMITHERM 2002
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Document Number: 73756
Revision 19-Jan-06
Si7884DP_RC
Vishay Siliconix
Document Number: 73756
Revision 19-Jan-06
www.vishay.com
3