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External component connection check

IP.com Disclosure Number: IPCOM000018457D
Original Publication Date: 2002-Sep-01
Included in the Prior Art Database: 2003-Jul-23

Publishing Venue

Siemens

Related People

Authors:
Bernacchia Giuseppe Chiozzi Giorgio Galvano Maurizio [+details]

Abstract

In testing circuits with an external current generator and external feedback resistors of a typical regulator may appear problems when the high side power is turned on. In switching regulators at the start-up of the system the output voltage reaches the maximum value power VCC if the controller doesn’t have feedback of the output voltage. This is dangerous for the connected device because it couldn’t sustain this voltage. Until now, there is no voltage regulator system that checks whether the feedback resistors are connected properly. That’s why the circuit arrangement in figure 1 is suggested.