R-C Thermal Model Parameters SQD15N06-42L_RC

SQD15N06-42L_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
Case
Foot
RT1
1.4498
920.6084m
N/A
RT2
29.6544
1.3167
N/A
RT3
11.7613
1.1059
N/A
RT4
6.7669
1.1708
N/A
Junction to
Ambient
Case
Foot
CT1
2.0337m
1.3139
N/A
CT2
1.8428
6.5196m
N/A
CT3
604.6069m
70.5420m
N/A
CT4
41.6849m
653.7104u
N/A
THERMAL CAPACITANCE (Joules/°C)
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: 67454
Revision: 03-Jan-11
www.vishay.com
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SQD15N06-42L_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
Case
Foot
RF1
3.3161
1.1720
N/A
RF2
8.5954
1.2052
N/A
RF3
16.9972
1.0158
N/A
RF4
20.6600
1.0710
N/A
THERMAL CAPACITANCE (Joules/°C)
Junction to
Ambient
Case
CF1
6.0642m
503.9403u
Foot
N/A
CF2
72.1314m
3.4649m
N/A
CF3
520.8259m
28.2813m
N/A
CF4
1.7643
599.1817m
N/A
Note
N/A indicates not applicable
www.vishay.com
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Document Number: 67454
Revision: 03-Jan-11
SQD15N06-42L_RC
Vishay Siliconix
Document Number: 67454
Revision: 03-Jan-11
www.vishay.com
3