Si4812BDY-RC

Si4812BDY_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 MOS
Ambient SCH
Foot
RT1
28.4528
11.1617
N/A
RT2
22.4857
31.4775
N/A
RT3
6.5630
23.8736
N/A
RT4
32.4985
33.4872
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient MOS
Ambient SCH
Foot
CT1
40.0298 m
433.0512 u
N/A
CT2
1.6857
96.9447 m
N/A
CT3
4.0731 m
6.9941 m
N/A
CT4
3.3716
1.8926
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: 74695
Revision: 09-May-07
www.vishay.com
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Si4812BDY_RC
Vishay Siliconix
R-C THERMAL MODEL FOR FILTER CONFIGURATION
R-C VALUES FOR FILTER CONFIGURATION
Thermal Resistance (°C/W)
Foot
Junction to
Ambient MOS
Ambient SCH
RF1
5.6118
13.4984
N/A
RF2
17.7793
26.2516
N/A
RF3
17.2242
32.2508
N/A
RF4
49.3847
27.9992
N/A
Thermal Capacitance (Joules/°C)
Junction to
Ambient MOS
Ambient SCH
Foot
CF1
2.4126 m
475.3633 u
N/A
CF2
23.2033 m
6.8757 m
N/A
CF3
67.9932 m
107.5056 m
N/A
CF4
1.4999
2.3063
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: 74695
Revision: 09-May-07
Si4812BDY_RC
Vishay Siliconix
Document Number: 74695
Revision: 09-May-07
www.vishay.com
3