DC-DC converters use synchronous rectifier technologyApr 20 2005 - Power [More Power Articles]
A range of highly integrated single-output, isolated converters, with output
currents of 6A and output voltages down to 1.8V, has been introduced by C&D
Available in three different, industry standard pin patterns, the NPX20
series delivers high levels of flexibility and functionality to new designs
and provides ´drop-in´ replacement options to existing designs that need to
evolve to higher currents and lower voltages.
The range is aimed at a wide variety of industrial, telecommunication, and
other applications using components that require low voltage inputs. The
series offers a choice of two wide input voltage ranges – nominal 24V input
devices can accommodate voltages from 18V to 36V, while the nominal 48V
input parts are compatible with voltages between 36V and 75V. Output voltage
options are 1.8V, 2.5V and 3.3V in both cases. The rated output current of
6A results in output powers ranging from 10.8W to 19.8W.
The converters are based on a synchronous rectifier technology and are
designed to meet the requirements of UL 60950. All of the devices have
input-to-output isolation of 1500VDC and incorporate high levels of
integrated functionality including over-voltage, over-current and
Each of the new converters is capable of operating to zero load. A remote
on/off pin and an output trim function that allows adjustment of the output
voltage by +/- 10% further simplifies circuit design and reduces the need
for external components.
NPX20 converters can be supplied in surface-mount and through-hole package
styles depending on the specific application requirements. Surface-mount
parts have dimensions of 51.2mm x 25.7mm x 8.5mm and through-hole
alternatives measure 50.4mm x 25.6mm x 6mm.