Si4838DY-RC

Si4838DY_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
7.0758
N/A
7.5020
RT2
17.0370
N/A
897.3355 m
RT3
17.4688
N/A
4.7711
RT4
38.1489
N/A
2.8545
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
19.3780 m
N/A
133.8260 m
CT2
2.0410
N/A
66.9080 m
CT3
87.3563 m
N/A
16.5866 m
CT4
2.9754
N/A
1.6241
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: 70366
Revision 19-Mar-07
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Si4838DY_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
7.3547
N/A
979.6962 m
RF2
18.0073
N/A
5.5894
RF3
17.9905
N/A
4.3890
RF4
35.8741
N/A
4.9596
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
14.1504 m
N/A
6.9088 m
CF2
48.5475 m
N/A
7.2628 m
CF3
824.9106 m
N/A
81.9651 m
CF4
1.4196
N/A
260.4108 m
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: 70366
Revision 19-Mar-07
Si4838DY_RC
Vishay Siliconix
Document Number: 70366
Revision 19-Mar-07
www.vishay.com
3