Si5943DU-RC

Si5943DU_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
26.9457
4.0321
N/A
RT2
6.7302
4.4398
N/A
RT3
20.4524
1.7651
N/A
RT4
50.4071
4.8035
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
4.3260 m
184.9208 u
N/A
CT2
280.1667 u
4.8811 m
N/A
CT3
77.3715 m
16.1497 m
N/A
CT4
1.5542
2.7666 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: 74271
Revision: 27-Jun-07
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Si5943DU_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
6.7602
5.4496
N/A
RF2
28.3247
9.2239
N/A
RF3
20.6980
164.6409 m
N/A
RF4
48.7669
290.6457 m
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
220.9423 u
161.3129 u
N/A
CF2
3.4499 m
1.8277 m
N/A
CF3
63.0446 m
185.9015 m
N/A
CF4
1.5334
6.0479 u
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: 74271
Revision: 27-Jun-07
Si5943DU_RC
Vishay Siliconix
Document Number: 74271
Revision: 27-Jun-07
www.vishay.com
3