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.
COMPATABILITY:
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
industrystandard
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 outputmonitor 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
AP-13 for more details.
SHIELDING:
The “10A→25A” Series models
are available with optional sixsided, 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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