GENERAL INFORMATION:
The “10A→25A” Series of regulated,
high-voltage DC-DC converters are an extension
of the “A” Series, directly addressing
the needs of the miniature PCB or chassis-mount ≥10kV
application. Designed and built utilizing state-of-the-art
power conversion topology, these units feature
surface-mount technology and encapsulation
techniques providing high reliability and low
cost.
COMPATIBILITY:
The Series “10A→25A” match
the standard “A” Series for design methodology, wide input range, remote control, enable/disable, reference,
shock, and vibration.
HIGH VOLTAGE OUTPUT:
The “10A→25A” Series is a non-isolated, unipolar converter. Positive or negative
output must be specified. Output is adjustable from 0 to 10kV, 15kV, 20kV, or 25kV. As the output
voltage is reduced towards 0, the maximum current capability remains unchanged.
HIGH VOLTAGE OUTPUT
TERMINATION:
The “10A→25A” Series utilizes silicon 20kV wire on the 10A
and 15A, silicon 30kV wire on the 20A and 25A. All flying leads are 18" and
can be terminated with a variety of industry-standard connectors. Contact customer
service for details.
OUTPUT VOLTAGE MONITOR:
The “10A→25A” Series features
a 1000:1 voltage monitor. The monitor has
an output impedance calibrated for use with
a 10 MegΩ input impedance meter. Overall
accuracy is ±2.5% with a temperature
coefficient of ±200 ppm per °C.
The “10A” uses a 500 MegΩ/523 kΩ divider.
The “15A” uses a 750 MegΩ/806 kΩ divider.
The “20A” uses a 1 GigΩ/1.1 MegΩ divider.
The “25A” uses a 1.25 GigΩ/1.43 MegΩ divider.
For “10A→25A” applications
requiring a different scale factor, such
as a 0 to 5VDC ADC compatible design, a
single, external, low-voltage resistor
may be added in parallel with the output
voltage monitor, to rescale its output.
The voltage monitor is output on pin 9
and referenced to signal-ground pin 5.
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OUTPUT
CURRENT MONITOR:
The “10A→25A” Series is equipped with an output current monitor.
Current from the high-voltage multiplier can be monitored by reading the voltage
appearing between output-monitor pin 3 and signal-ground pin 5. The monitor
has an output impedance of >20 kΩ. Internal voltage dividers create
a small, linear-offset voltage. See Application Note
13 for
more details.
SHIELDING:
The “10A→25A” Series models
are available with optional six-sided, wrap-around
Mu-Metal Shielding. This shielding attenuates
magnetic and electrostatic emissions, while
shielding internal circuitry from outside
noise, thereby reducing overall output ripple
by as much as 25% to 50%.
MECHANICAL:
The “10A→25A” Series converters are in PCB-mountable plastic
cases requiring footprints of only 5.5in² to 11.0in² and volumes of only 4.9in³
to 11.6in³. Mounting plates and brackets are available for chassis mounting.
Also available is a metal RF-tight, PCB/chassis-mount package. See Application
Note 6 for thermal considerations and mounting configurations. All models are
available with optional “-M” six-sided, wrap-around Mu-Metal Shielding.
Despite their high efficiency, the compact, PCB-mounted, 15- & 30-watt units
require the optional “-H” factory-installed heat sink or an equivalent
customer-installed device in high-temperature applications.
ENVIRONMENTAL:
The “10A→25A” Series provides
full power operation at case temperatures
from -40 to +65°C. All units receive
a 24-hour burn-in prior to final test. Extended
temperature range is available along with
other enhanced capabilities. Please contact
the factory.
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