Si8465DB_RC

Si8465DB_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. R-C values for the
electrical circuit in the Foster/tank and Cauer/filter
configurations are included. When implemented in P-SPICE,
these values have matching characteristic curves to the
single-pulse transient thermal impedance curves for the
MOSFET.
These RC values can be used in the P-SPICE simulation to
evaluate the thermal behavior of the MOSFET junction
temperature under a defined power profile. These
techniques are described in application note AN609,
“Thermal Simulation of Power MOSFETs on the P-SPICE
Platform”.
R-C THERMAL MODEL FOR TANK CONFIGURATION
T (Junction)
RT1
RT2
RT3
RT4
CT1
CT2
CT3
CT4
T (Ambient)
R-C VALUES FOR TANK CONFIGURATION
THERMAL RESISTANCE (°C/W)
Junction to
Ambient-Full Copper(FC)
Ambient-Minimum Copper(MC)
Foot
RT1
41.7716
52.8539
N/A
RT2
9.6630
38.0723
N/A
RT3
23.9352
58.5941
N/A
RT4
24.4879
40.8002
N/A
THERMAL CAPACITANCE (Joules/°C)
Junction to
Ambient-Full Copper(FC)
Ambient-Minimum Copper(MC)
CT1
267.8702 u
829.7687 u
Foot
N/A
CT2
565.9177 m
57.9980 m
N/A
CT3
4.6510 m
4.8205 m
N/A
CT4
1.6538
583.1416 m
N/A
Note
N/A indicates not applicable
This document is intended as a SPICE modeling guideline and does not constitute a commercial product datasheet. Designers should refer to
the appropriate datasheet of the same number for guaranteed specification limits.
Document Number: 65452
Revision: 09-Sep-09
www.vishay.com
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Si8465DB_RC
Vishay Siliconix
R-C THERMAL MODEL FOR FILTER CONFIGURATION
T (Junction)
RF2
RF1
CF1
CF2
RF3
RF4
T (Ambient)
CF4
CF3
GND
R-C VALUES FOR FILTER CONFIGURATION
THERMAL RESISTANCE (°C/W)
Junction to
Ambient-Full Copper(FC)
Ambient-Minimum Copper(MC)
Foot
RF1
45.5917
75.5098
N/A
RF2
21.8254
54.0982
N/A
RF3
28.1334
29.6710
N/A
RF4
4.5611
29.9583
N/A
Junction to
Ambient-Full Copper(FC)
Ambient-Minimum Copper(MC)
Foot
CF1
249.0576 u
721.3691 u
N/A
CF2
5.0482 m
6.4083 m
N/A
CF3
714.6096 m
102.6309 m
N/A
CF4
20.0003
657.3939 m
N/A
THERMAL CAPACITANCE (Joules/°C)
Note
N/A indicates not applicable
www.vishay.com
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Document Number: 65452
Revision: 09-Sep-09
Si8465DB_RC
Vishay Siliconix
Document Number: 65452
Revision: 09-Sep-09
www.vishay.com
3