June
2004, Issue 167
Test Your
EQ:
|
Answer
2—A
buck regulator is used when the input voltage is higher
than the output voltage.
When
the switch closes, the coil is charged with energy (current).
When the switch opens, the coil current continues to flow
through the diode. If the coil current reaches zero, the
diode blocks reverse current through the coil.
Contributor:
David Tweed
