Si4842DY-RC

Si4842DY_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
2.1646
N/A
253.8192 m
RT2
22.7237
N/A
4.1485
RT3
31.7971
N/A
6.6629
RT4
23.2083
N/A
4.9847
Thermal Capacitance (Joules/°C)
Junction to
Ambient
Case
Foot
CT1
20.8422 m
N/A
18.9670
CT2
47.2729 m
N/A
155.1850 m
CT3
2.0384
N/A
257.9792 m
CT4
3.7242
N/A
13.8749 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: 73827
Revision 02-Mar-06
www.vishay.com
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Si4842DY_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
3.7489
N/A
4.7871
RF2
22.2239
N/A
3.9192
RF3
32.9041
N/A
6.5521
RF4
21.1242
N/A
755.2501 m
Junction to
Ambient
Case
Foot
CF1
12.2646 m
N/A
10.3395 m
CF2
32.9132 m
N/A
32.2002 m
CF3
1.1221
N/A
127.3779 m
CF4
1.2290
N/A
3.8073
Thermal Capacitance (Joules/°C)
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: 73827
Revision 02-Mar-06
Si4842DY_RC
Vishay Siliconix
Document Number: 73827
Revision 02-Mar-06
www.vishay.com
3