Title :
Automated test system for the characterization of switching regulators using VXI instrumentation
Author :
Lázaro, Antonio Manuel ; Sánchez, Francesc ; Ramos, Rafael ; Guinjoan, Francesc
Author_Institution :
Dept. of Electron. Eng., Univ. Politecnica de Catalunya, Barcelona, Spain
Abstract :
This paper introduces a computer-based virtual instrument (VI) which can perform an automated test on Pulse Width Modulator (PWM) IC´s and a dynamical characterization of DC-DC switching converters. Such VI has been implemented using programmable GPIB instruments and VXI modules, performing both signal routing and data acquisition. The first section of the VI is devoted to the test of the PWM devices used as duty cycle controllers in the design of switched DC-DC converters. The second section of the designed VI can be used to make a dynamical characterization of PWM-based switching DC-DC converter by means of a complete set of measurements, such as input to output and control to output transfer function, input admittance, etc. As an example, both electrical characteristics over normal operating conditions of the SG3524 and TL1451AC PWM and a dynamical characterization of a PWM-based Buck converter have been obtained
Keywords :
DC-DC power convertors; PWM power convertors; automatic test equipment; automatic test software; computer networks; data acquisition; integrated circuit testing; peripheral interfaces; power integrated circuits; transfer functions; Buck converter; DC-DC switching converters; LabVIEW; PWM IC; VXI instrumentation; VXI modules; automated test system; computer-based virtual instrument; control to output transfer function; data acquisition; duty cycle controllers; dynamical characterization; input admittance; input to output transfer function; normal operating conditions; programmable GPIB instruments; signal routing; switching regulators; Automatic testing; DC-DC power converters; Data acquisition; Instruments; Performance evaluation; Pulse width modulation; Pulse width modulation converters; Routing; Switching converters; System testing;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1996. IMTC-96. Conference Proceedings. Quality Measurements: The Indispensable Bridge between Theory and Reality., IEEE
Conference_Location :
Brussels
Print_ISBN :
0-7803-3312-8
DOI :
10.1109/IMTC.1996.507372
