IC thermal management system

• US 8,531,841 B2
• Filed: 10/26/2010
• Issued: 09/10/2013
• Est. Priority Date: 10/26/2010
• Status: Active Grant

• Current Assignee: Tdk-Lambda Corporation (TDK Corporation)
• Original Assignee: Tdk-Lambda Corporation (TDK Corporation)
• Inventors: Lee, Gordon K. Y.
• Primary Examiner(s): SMITH, COURTNEY L
• Application Number:
  US12/912,476
• Publication Number:
  US 20120099280A1
• Time in Patent Office: 1,050 Days
• Field of Search: None
• US Class Current: 361/708
• CPC Class Codes: H05K 7/209 Heat transfer by conduction from internal heat source to heat radiating structure H05K7/20909 takes precedence

Abstract

The present invention provides a non-intrusive method for dissipating heat from open-frame DC-DC power converters where bottom side components are exposed. A thermal interface material is placed between the motherboard to which the power converter is soldered and power dissipating and temperature sensitive components on the bottom of the power converter. The thermal interface material fills the gap between the power converter components and the motherboard, thereby providing a heat conductive path for dissipating heat from the power converter to the motherboard.

Claims

1. A method of dissipating heat from a dc-dc power converter, the method comprising the steps of:

(a) placing a compressible electrically insulating underfill thermal interface material in contact with the button of the power converter; and

(b) placing the compressible electrically insulating underfill thermal interfaces material contacting the bottom of the power converter in contact with a motherboard;

wherein

the compressible electrically insulating underfill thermal interface material fills space between the bottom of the power converter and the surface of the motherboard and thereby provides a heat conductive path that transfers heat from the power converter to the motherboard printed wiring;

the compressible electrically insulating underfill thermal interface material is in the form of a compliant compressible thermal pad; and

double sided adhesive tape is attached to components on the power converter to provide a non-intrusive method of attaching the power converter to the motherboard while providing compression for the thermal pad.

2. The method according to claim 1, wherein step (a) is performed during manufacture of the power converter as a stand alone product.

3. The method according to claim 1, further comprising compresssing the compressible electrically insulating underfill thermal interface material during step (b) to increase efficiency of heat transfer.

4. The method according to claim 1, wherein beat conduction through the compressible electrically insulating underfill thermal interface material to the motherboard cools the power converter.

5. The method according to claim 1, wherein the power converter comprises an open-frame construction with bottom side components exposed prior to contacting the power converter to the motherboard through the compressible electrically insulating underfill thermal interface material.

6. The method according to claim 1, wherein the compressible electrically insulating underfill thermal interface material comprises BERGQUIST GAP PAD.