Press Releases | New Design | DC/DC Converter with 20kV Isolation Voltage0 pages

120W, Corona-free, 20kV Isolation Voltage DC/DC Converter
DIO 120 Series
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20kVac isolation input/output, output/chassis
Corona free at 10kVac
Rugged, industrial quality
Convection cooled - no fan
Single output
Fully electronic protection

This DC/DC converter was developed for high operating isolation voltage. It is a lower cost version of the DIO 122 Series with
single output - the encapsulated output chamber is not included in this design. The unit has a feedback system on the primary
side which does not use any optical components to ensure high reliability. The transformer, which is engineered with
ABSOPULSE’s field-proven proprietary technology, is tested for corona (partial discharge) extinction at a minimum of 10kVac
and Hi-Pot tested for 20kVac isolation. The typical operating voltage potential between primary and secondary is 2-5kVac. This
value depends on the specific application, contamination class and is limited by the creepage distance of 76mm (3.0”) on the
PCB. Full electronic protection, low component count, large design headroom, and the use of components with established
reliability result in a high MTBF. The unit is manufactured at our plant under strict quality control. Customized versions are
available.

SPECIFICATIONS

Input Voltage (Operating Range)
24Vdc (22-28V)
48Vdc (44-56V)
Other inputs available on request

Output Voltages
12V, 15V or 24Vdc at 5A max.
Other outputs available on
request

Input Protection
Inrush current limiting
Varistor
Reverse polarity protection by
crowbar diode
Internal safety fuse
Lower voltage than the specified
minimum will not damage the unit

Redundancy diode
Not installed
Available as option

Isolation
1.5kVdc input to chassis
20kVac input to output
76 mm (3.0”) spacing
20kVac output to chassis
Corona extinction 10kVac
minimum for the transformer
Standards
Designed to meet UL508 and
related standards
EMI
EN 55022 Class A with margins

Line/Load Regulation
±4% combined from 10% load
to full load
Dynamic Response
Max 5% voltage deviation for
10% to 50% load step
Output Ripple/Noise
Better than 60mVrms or 300mV
peak to peak (20MHzBW)
Overload Protection
Rectangular current limiting with
short circuit protection.
Output Over-voltage Protection
Transzorb on output

Efficiency
Min 82% at full load

Indicators
Green “Output ON” LED

Operating Temperature
-20ºC to 50ºC for full
specification without de-rating

Control Input
None

Temperature Drift
0.03% per oC over operating
temperature range
Cooling
By convection
Environmental Protection
Basic ruggedizing
Shock/Vibration
IEC61371 Cat 1 A&B
Humidity
5 - 95% non-condensing
MTBF
130,000 hours at 45oC
Demonstrated MTBF is
significantly higher.

Alarm Output
None
Package Dimensions
Open board: 102 x 305mm (4” x 12”)
Component height: 70mm (2.3”)
Weight
0.68kg (1.5 lb)
Connections
Input:
3-pole barrier-type terminal block
with 3/8” spacing
Output:
2-pole barrier type terminal block
RoHS Compliance
Fully compliant
Warranty
Two years subject to application
within good engineering practice
Terminal Block Pin-out

Switching Frequency
80kHz ±5kHz

Please note that ABSOPULSE power supplies are designed and built to customer specifications. The specifications on this data sheet are generic
and will vary depending on input/output configuration and other customer requirements. Generic specifications are subject to change
Designer and manufacturer of quality converters, inverters, UPS systems, complete rack mount systems and DC-input
fluorescent lamp inverters since 1982. Custom or standard. Absopulse is a BABT-approved Facility
ABSOPULSE ELECTRONICS LTD
110 Walgreen Road, Ottawa. Ontario | K0A 1L0 | CANADA

Tel: +1-613-836-3511 | Fax: +1-613-836-7488

E-mail: absopulse@absopulse.com | http://www.absopulse.com
Binder Section: DC/DC Power Supplies
June 5, 2013/TS/CL
http://www.absopulse.com/Absopulse_railway_mobile_extreme_environment_solutions.php

Made in Canada