GENERAL INFORMATION:
This High Power line of high-voltage regulated
DC to DC converters is an extension of
the “C” Series, directly
addressing the high power density needs
of >30 watt applications. High Power “C” units
provide up to 60/125/250 watts. This
high power density is especially suited
to highenergy systems with large capacitances,
fast repetition rates, or high continuous-DC-power
requirements. See Application
Note 10 for more charging information.
COMPATABILITY:
The High
Power “C” Series
matches
the
standard
30
watt “C” Series
for
design
methodology,
wide
input
range,
remote
control,
enable/disable,
and
reference.
LOW VOLTAGE INPUT :
The
input
is
a
dual
row,
7
pin
IDC
header.
The
first
row
has
the
same
pin
out & signals
as
the
30
watt “C” Series.
The
second
row
provides
the
pins
required
to
support
the
High
Power “C” Series
version.
Connections
can
be
made
via
J-hooked
and
soldered
leads,
or
via
AMP
MOD-U
connectors
with
high-pressure,
high-current
pins.
See
Application
Note
3.
A
directmounted
PCB
with
header
sockets,
such
as
the
UltraVolt
interface
board,
can
mate
to
the
chassis-mounted
power
supply’s
input
header.
Seven
#4-40
and
two
#2-56
PEM
nuts
are
provided
on
the
top
cover
for
this
purpose.
The
250
watt
models
also
feature
a
four-pin,
high-current
input
power
connector.
HIGH VOLTAGE OUTPUT :
The High Power “C” Series is a non-isolated, unipolar converter.
Positive or negative output must be specified. Output is adjustable from 0
to 125, 250, 500, 1kV, 2kV, 4kV or 6kV on all 60W/125W/250W units. Additionally,
60W/125W models are adjustable from 0 to 8kV, 10kV, 12kV or 15kV. As the output
voltage is reduced towards 0, the maximum current capability remains unchanged.
Internal capacitance is kept to a minimum to facilitate fast-rise applications.
Most fast-rise applications involve charging a storage capacitor, which also
acts as an additional output filter/storage capacitor. If your application
is continuous DC bias power, an external filter/storage capacitor should be
added. Contact UV CSD for recommended capacitor values.
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OUTPUT
VOLTAGE MONITOR:
A 100 MegΩ divider provides a 100:1 voltage monitor on models up to 6kV.
On models 8kV and higher a 1 GigΩ divider provides a 1000:1 test point.
The monitor has an output impedance of 1.1 MegΩ and is calibrated for
use with a 10 MegΩ input impedance meter. Overall accuracy is +/-2.0%
with a temperature coefficient of +/-200 ppm per °C. For applications requiring
a different scale factor, such as an ADC compatible design, an external resistor
may be added in parallel with the output.
OUTPUT CURRENT MONITOR:
The High Power “C” Series is
equipped with an output current monitor.
Current from the high-voltage multiplier
can be monitored by reading the voltage generated
between Output Monitor pin 3 and Signal Ground
pin 5. The monitor has an output impedance
of 5.1 kΩ. Internal voltage dividers
create a small linear offset voltage. See
Application Note 13 for more information,
including scale factor.
MECHANICAL:
The High Power “C” Series converters are packaged in chassis-mount
aluminum enclosures, mounted using the four #8-32 studs and thermal interfacing
material. Electrical connections are via wiring harness or top cover mounted
PCB. The 60W/125W units up to 6kV utilize the standard 19 in³ enclosure. The
60W/125W units 8kV and higher use the extended 38 in³ enclosure along with the
250W units up to 6kV. See Application Note 6 for thermal considerations and mounting
configurations.
ENVIRONMENTAL:
The High Power “C” Series provides
full power at case temperature from -40 to
+65°C. Extended temperature range is available
along with other enhanced capabilities. Please
contact the factory. All units receive a
24 hour burn in prior to final testing.
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