Si4470EY-RC

Si4470EY_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
21.9604
N/A
5.7953
RT2
6.3818
N/A
923.7476 m
RT3
13.3371
N/A
5.8236
RT4
37.9264
N/A
8.4613
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
41.6847 m
N/A
54.8120 m
CT2
8.8410 m
N/A
1.2546 m
CT3
356.1870 m
N/A
12.8310 m
CT4
2.0833
N/A
196.0715 m
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: 74305
Revision 08-May-07
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Si4470EY_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
5.1205
N/A
1.6149
RF2
23.7400
N/A
8.9202
RF3
14.9587
N/A
7.2244
RF4
35.7281
N/A
3.2532
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CF1
4.8970 m
N/A
1.9824 m
CF2
21.5550 m
N/A
8.7635 m
CF3
162.1276 m
N/A
68.3828 m
CF4
1.9274
N/A
473.3334 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: 74305
Revision 08-May-07
Si4470EY_RC
Vishay Siliconix
Document Number: 74305
Revision 08-May-07
www.vishay.com
3