An Easy Way To Roll Your Own Programmable Power Supply

Focus:

For any power supply with external feedback components, the addition of an inexpensive DAC and a resistor makes the power supply programmable. Example uses a dc-dc converter IC. Equations are presented for selecting the appropriate resistor values.

What you’ll learn:

• How to add digital programmability to power supplies with external feedback components.
• How to calculate resistor values when adding digital programmability to dc-dc converters and voltage regulators

Notes:

ED's Ideas For Design

View the Source

Author & Publication:

Marc Davis-Marsh, applications engineer, National Semiconductor Corp., Santa Clara, Calif., Donald Schelle, staff field applications engineer, National Semiconductor Corp., Ontario, Canada, Electronic Design, Jan 29 2009

This article summary appears
in the HOW2POWER Design Guide.

The Design Guide offers
organized access to
hundreds of articles
on dozens of power conversion
and power management topics.

The Design Guide search results
include exclusive summaries
and accurate "how to" analysis
to help you make faster,
more informed decisions.

Search
for more articles