FINAL REPORT

FINAL REPORT - Designing and investigating the operation of...

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1 Designing and investigating the operation of FAN2103 TinyBuck™ Integrated Synchronous Buck Regulator FINAL REPORT Submitted on: 26 th April, 2010 Submitted to Dr. Douglas C. Hopkins Dept. of Electrical Engineering University at Buffalo DCHopkins@buffalo.edu Submitted by Krishna Chaitanya Nutukurthi krishnac@buffalo.edu Jing Li jli25@buffalo.edu
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2 NOTICE This report was prepared by Jing Li and Krishna Chaitanya Nutukurthi , in the course of performing work for and sponsored by the State of New York and the University at buffalo . The opinions expressed in this report do not necessarily reflect those of the Sponsors or the State of New York, and reference to any specific product, service, process, or method does not constitute an implied or expressed recommendation or endorsement of it. Further, the Sponsors and the State of New York make no warranties or representations, expressed or implied, as to the fitness for particular purpose or merchantability of any product, apparatus, or service, or the usefulness, completeness, or accuracy of any processes, methods, or other information contained, described, disclosed, or referred to in this report. The Sponsors, the State of New York, and the project group make no representation that the use of any product, apparatus, process, method, or other information will not infringe privately owned rights and will assume no liability for any loss, injury, or damage resulting from, or occurring in connection with, the use of information contained, described, disclosed, or referred to in this report.
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ABSTRACT The Fan2103 TinyBuck™ is an easy-to-use, cost- and space-efficient, 3A synchronous buck solution. It enables designers to solve high current requirements in a small area with minimal external components. The operation of FAN2103 TinyBuck™ Integrated Synchronous Buck Regulator is investigated under several different situations. The soft-start characteristics are to be tested by applying V IN before V CC to the circuit. Study the features of output current limitation and programmable frequency settings by Paralleling resistors with R9 or R10 on the board. Test the invariability of output voltage by changing the input voltage from 8V to 20V or modifying the resistance load from 1 to 9.99 KΩ. By applying a V IN of 8V to 20V before a constant V CC of 5V, the soft-start is exactly displayed on oscilloscope during a span about 10 mini seconds. External current threshold drops correctly and sharply from 3.2A or 3.3A to almost zero when decreasing R9 slightly to 150 KΩ. And programmable frequency settings can also be precisely controlled to rise by decreasing R10 by the paralleled resistors. The output displayed a constant feature when changing the input voltage or the resistance load. Keywards:
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FINAL REPORT - Designing and investigating the operation of...

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