Preheating device for electronic circuits

Details Preheating device for electronic circuits Preheating device for electronic circuits

1997-08-05

1999-04-20

Gaffin, Jeffrey

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361103, 219209, H05B 100

Patent

active

058962590

ABSTRACT:
A system for preheating electronic components on a printed wiring board or other interconnecting substrate prior to application of voltage to the components in extreme cold temperature environments. Copper traces are employed as embedded heater elements. A control circuit disables operation of an on-board DC/DC switching converter used to provide power to the electronic components until the board has reached a threshold temperature during a preheating period. Thereafter, the heater operation is synchronized with the operation of the switching converter, such that the temperature can be maintained, yet total power supply current to the board never exceeds a predetermined maximum level.

REFERENCES:
patent: 3662150 (1972-05-01), Hartung
patent: 4374316 (1983-02-01), Inamori et al.
patent: 5010233 (1991-04-01), Henschen et al.
patent: 5369245 (1994-11-01), Pickering
patent: 5521357 (1996-05-01), Lock et al.
patent: 5539186 (1996-07-01), Abrami et al.

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