Si4890DY-RC

Si4890DY_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)
Junction to
Ambient
Case
Foot
RT1
5.8804
N/A
N/A
RT2
14.8471
N/A
N/A
RT3
32.2261
N/A
N/A
RT4
47.0464
N/A
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
2.2957 m
N/A
N/A
CT2
30.0711 m
N/A
N/A
CT3
213.4549 m
N/A
N/A
CT4
2.2477
N/A
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: 74599
Revision: 01-Jun-07
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Si4890DY_RC
Vishay Siliconix
R-C THERMAL MODEL FOR FILTER CONFIGURATION
R-C VALUES FOR FILTER CONFIGURATION
Thermal Resistance (°C/W)
Junction to
Ambient
Case
Foot
RF1
6.2566
N/A
N/A
RF2
16.8750
N/A
N/A
RF3
34.7715
N/A
N/A
RF4
42.0969
N/A
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
1.8326 m
N/A
N/A
CF2
21.0007 m
N/A
N/A
CF3
160.7741 m
N/A
N/A
CF4
2.2557
N/A
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: 74599
Revision: 01-Jun-07
Si4890DY_RC
Vishay Siliconix
Document Number: 74599
Revision: 01-Jun-07
www.vishay.com
3