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
UltraVolt's Customer Service Department 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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