3.3 VOLT REQUIREMENTS
Voltages keep coming down. The most popular voltages years ago were in the 400-600V range and Kepco made such power supplies.
When
transistors became popular, the most popular voltages were 24-28V and Kepco made such power supplies.
40 Watt Model KRW 351KV
When IC's took the stage, the voltage dropped to 5V and, of course, Kepco made and continues to make 5V models (as well as 12V,
15V, 24V,
28V, 48V models...all the way up to 2000V). In recent years, we find that the effort to reduce the power consumption of
portable instruments
has pushed the voltages well below 5V. Responding to this, Kepco offers a number of models that operate in the 2.8V to 3.3V
range in power
ranging from 40W to 1000 Watts.
Of particular interest to designers are triple-output models featuring a principal output of +3.3V combined with ±12V
outputs. In a
compact 3
" x 5
" card-style OEM package, these models in Kepco's KRW design group are ideal for powering the new low-voltage logic chips
when
they are operating from the a-c mains.
KRW feature a wide range a-c input that accepts any input from 90 to 264 volts. They have safety approval from UL, CSA and
TÜV and
feature an EMI filter to suppress the conducted EMI to the FCC class B level. KRW models are also available for +5V with
±12V or
±15V.
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Vol.6, No.1