GENERAL INFORMATION:
The "30A → 40A" Series regulated
high-voltage DC-DC converters are an extension
of the "A" Series, directly addressing
the needs of the miniature PCB or chassis-mount ≥30kV
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 "30A → 40A" match
the standard "A" Series for design
methodology,
wide input
range,
remote
control,
enable/disable,
reference,
shock & vibration.
HIGH VOLTAGE OUTPUT:
The "30A → 40A" Series
is
a
non-isolated
unipolar
converter.
Positive
or
negative
output
must
be
specified.
Output
is
adjustable
from
0
to
30kV,
35kV
or
40kV.
As
the
output
voltage
is
reduced
towards
0,
the
maximum
current
capability
remains
unchanged.
HIGH VOLTAGE OUTPUT
TERMINATION:
The "30A→40A" Series
utilizes
40kV
PVC
wire.
All
flying
leads
are
18" and
can
be
terminated
with
a
variety
of
industrystandard
connectors.
Contact
customer
service
for
details.
OUTPUT VOLTAGE MONITOR:
The "30A → 40A" Series features
a 1000:1 voltage monitor. The monitor has
an output impedance calibrated for use with
a 10-Megohm input impedance meter. Overall
accuracy is ±2.5% with a temperature
coefficient of ±200 ppm per °C.
The "30A" uses
a 1.5 Gigohm/1.78 Megohm divider.
The "35A" uses a 5 Gigohm/10 Megohm
divider.
The "40A" uses a 5 Gigohm/10 Megohm
divider.
For "30A → 40A" 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 "30A → 40A" 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 >20kΩ. Internal voltage dividers create
a small, linear-offset voltage. See Application Note
AP- 13 for more details.
SHIELDING:
The "30A → 40A" 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% when combined with
the Ripple Stripper® filter.
MECHANICAL:
The "30A → 40A" Series converters are in PCB mountable plastic
cases requiring footprints of only 11.1 in² to 12.75 in² and volumes of only
11.7 in³ to 16.25 in³. 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 units require the optional "-H" factory-installed
heat sink or an equivalent customer-installed device in high-temperature applications.
ENVIRONMENTAL:
The “30A → 40A” 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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