si7738dp| Datasheet

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Si7738DP_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 RT1 RT2 RT3 RT4 Junction to CT1 CT2 CT3 CT4 Ambient 9.6744 39.3627 13.0119 2.9510 Ambient 113.4016 m 2.0969 1.7672 23.8769 m Case 210.0481 m 342.2716 m 279.3315 m 468.3488 m Case 2.7780 m 16.5220 m 31.3904 m 21.5577 m Foot N/A N/A N/A N/A Foot N/A N/A N/A N/A

Thermal Capacitance (Joules/ C)

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: 68680 Revision: 22-Apr-08

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