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 “8C→30C” units
provide up to 60/125 watts. This high
power density is especially suited to
high-energy 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 “8C→30C” 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
direct-mounted
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.
HIGH VOLTAGE OUTPUT :
The High Power “8C→30C” Series is a non-isolated, unipolar
converter. Positive or negative output must be specified. Output is adjustable
from 0 to 8kV, 10kV, 12kV, 15kV, 20kV, 25kV or 30kV. 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 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 “8C→30C” 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 “8C→30C” Series converters are packaged in chassis-mount
aluminum enclosures, mounted using #8-32 hardware and thermal interfacing
material. Electrical connections are via wiring harness or top cover mounted
PCB. All 60W/125W units 8kV and higher use the extended 38 in³ enclosure.
See
Application Note 6 for thermal considerations and mounting
configurations.
ENVIRONMENTAL:
The High Power “8C→30C” 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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