UM8-40 Series

9 Voltage Ranges from 8kV to 40kV, Fixed Negative or Positive Polarity
Available Output Power Increments of 4, 15 and 30 Watts
Voltage/Current Regulation with Automatic Crossover Control
Voltage and Current Monitor Signals
Fully Arc and Short Circuit Protected
Precision +5V Reference Output
Comprehensive Standard Interface
CE listed and RoHS compliant

Certifications & Compliance

DC-DC High Voltage Power Supplies

Form, Fit and Function Design:

Spellman’s UM Series of printed circuit board mountable, high voltage modules offer a form, fit and function replacement for presently available commercially made units, while providing additional features and benefits at competitive pricing. Utilizing proprietary power conversion technology and Spellman's six decades of high voltage experience, these SMT based high voltage modules provide improved performance/reliability and easier system integration at a lower cost when compared to the competition.

Advanced Power Conversion Topology:

UM converters use a proprietary zero voltage switching power conversion topology providing exceptional efficiency and inherent low noise and ripple. Radiated emissions are reduced compared to conventional switching topologies, minimizing or even eliminating the need to shield the unit from adjacent circuitry.
The high voltage output is generated using a ferrite core high voltage step up transformer which feeds a half wave Cockcroft-Walton voltage multiplier to obtain the specified high voltage output.
Due to the fixed, high frequency conversion rate the output capacitance is small resulting in minimal stored energy. Through the use of generously rated surge limiting resistors and a fast acting current loop, all units are fully arc and short circuit protected.

Control and Regulation:

The actual output voltage generated is sampled via a high impedance divider to create a voltage feedback signal. A current feedback signal is created via a current sense resistor in the low end return of the high voltage output circuitry. These two accurate ground referenced feedback signals are used to precisely regulate and control the units in addition to external monitoring purposes.
Due to the UM’s unique converter topology it can provide full current into low impedance loads or even a short circuit. Standard units limit at 103% of maximum rated output current.

Standard Interface:

The Spellman UM Series interface provides current programming capability and positive polarity, buffered, low output impedance voltage and current monitor signals (zero to +4.64Vdc equals zero to full scale rated). A voltage programming input is provided where 0 to +4.64Vdc equals 0 to 100% of rated voltage.
Current programmability allows the user to set where the unit will current limit, anywhere from 0 to 100% of maximum rated current. This feature is beneficial where less than full output current is desired, like in the case of protecting a sensitive load.
The buffered low impedance voltage and current monitor signals can drive external circuitry directly, while minimizing loading and pickup effects. These features save the user the expense and implementation of external interface buffering circuitry while improving overall signal integrity.
This standard interface is made available via a row of 13 pins with 0.1. pin spacing. A legacy interface (7 pins on a 0.2. spacing) that is compatible with presently available commercially made units can be provided by ordering the “L” option.

Mechanical and Environmental Considerations:

The UM Series are solid encapsulated, printed circuit board mountable, plastic cased converters. All units are encapsulated using a silicon based potting material which is considerably lighter in weight than epoxy. Isolated, non grounded 2-56 machine screws thread into the module to securely mount it to the printed circuit board, relieving any stress on the interface pins. Mounting plates, brackets and flanged mounting options are also available. High voltage output is provided via a 36. (914.4mm) minimum length of appropriately rated high voltage wire.

Regulatory Approvals:

Compliant to EEC EMC Directive. Compliant to EEC Low Voltage Directive. UL/CUL recognized, File E227588. RoHS Compliant.

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주문 방법
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Input Voltage:
12Vdc for 4W, 24Vdc for 15W and 30W
Nominal Voltage Range:
11Vdc to 30Vdc for 4W, 23Vdc to 30Vdc for 15W and 30W 4W units can operate at 24Vdc input with no deratings or damage to unit
Input Current:
(typical)
Disabled:
10mA @ 24Vdc
Full output, no load:
160mA @ 24Vdc, 300mA @ 12Vdc
Full output, full load:

4 watt units:
330mA @ 24Vdc, 640mA @ 12Vdc

15 watt units:
850mA @ 24Vdc

30 watt units:
1590mA @ 24Vdc
Dimensions:

8kV-12kV:
3.700. L X 1.500. W X 0.990. H (93.98mm X 38.10mm X 25.03mm)

15kV-20kV:
4.700. L X 1.500. W X 0.990. H (119.38mm X 38.10mm X 25.03mm)

25kV-40kV:
6.960. L X 1.600. W X 1.14. H (176.78mm X 40.84mm X 28.87mm)

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UM 4W, 8kV TO 40kV SELECTION TABLE

Model Number	Output V	Output Current	Ripple(max) %Vp-p	Output Capacitance	Arc Limiting Resistance	I Sense Scaling Full Scale Signal	High Voltage Divider Resistance
UM8*4	0 to 8kV	0.5mA	0.05	6830pF	50kΩ	5V	200MΩ
UM10*4	0 to10kV	0.4mA	0.05	4380pF	50kΩ	2.4V	300MΩ
UM12*4	0 to 12kV	0.333mA	0.05	4380pF	50kΩ	3.33V	300MΩ
UM15*4	0 to 15kV	0.266mA	0.05	3220pF	100kΩ	1.69V	400MΩ
UM20*4	0 to 20kV	0.2mA	0.05	2310pF	100kΩ	1.316V	550MΩ
UM25*4	0 to 25kV	0.16mA	0.05	1540pF	100kΩ	1.1V	800MΩ
UM30*4	0 to 30kV	0.133mA	0.05	1370pF	120kΩ	0.95V	900MΩ
UM35*4	0 to 35kV	0.115mA	0.05	1370pF	140kΩ	0.72V	900MΩ
UM40*4	0 to 40kV	0.1mA	0.05	1370pF	140kΩ	1.3V	900MΩ

UM 15W, 8kV TO 40kV SELECTION TABLE

Model Number	Output V	Output Current	Ripple(max) %Vp-p	Output Capacitance	Arc Limiting Resistance	I Sense Scaling Full Scale Signal	High Voltage Divider Resistance
UM8*15	0 to 8kV	1.875mA	0.05	6830pF	50kΩ	3.75V	200MΩ
UM10*15	0 to 10kV	1.5mA	0.05	4380pF	50kΩ	8.152V	300MΩ
UM12*15	0 to 12kV	1.25mA	0.05	4380pF	50kΩ	5V	300MΩ
UM15*15	0 to 15kV	1mA	0.05	3220pF	100kΩ	5.53V	400MΩ
UM20*15	0 to 20kV	0.75mA	0.05	2310pF	100kΩ	4.21V	550MΩ
UM25*15	0 to 25kV	0.6mA	0.05	1540pF	100kΩ	3.42V	800MΩ
UM30*15	0 to 30kV	0.5mA	0.05	1370pF	120kΩ	2.89V	900MΩ
UM35*15	0 to 35kV	0.429mA	0.05	1370pF	140kΩ	2.39V	900MΩ
UM40*15	0 to 40kV	0.375mA	0.05	1370pF	140kΩ	4.21V	900MΩ

UM 30W, 8kV TO 40kV SELECTION TABLE

Model Number	Output V	Output Current	Ripple(max) %Vp-p	Output Capacitance	Arc Limiting Resistance	I Sense Scaling Full Scale Signal	High Voltage Divider Resistance
UM8*30	0 to 8kV	3.75mA	0.05	6830pF	50kΩ	5.36V	200MΩ
UM10*30	0 to 10kV	3mA	0.05	4380pF	50kΩ	7.87V	300MΩ
UM12*30	0 to 12kV	2.5mA	0.05	4380pF	50kΩ	5V	300MΩ
UM15*30	0 to 15kV	2mA	0.05	3220pF	100kΩ	5.29V	400MΩ
UM20*30	0 to 20kV	1.5mA	0.05	2310pF	100kΩ	8.15V	550MΩ
UM25*30	0 to 25kV	1.2mA	0.05	1540pF	100kΩ	6.56V	800MΩ
UM30*30	0 to 30kV	1mA	0.05	1370pF	120kΩ	5.52V	900MΩ
UM35*30	0 to 35kV	0.857mA	0.05	1370pF	140kΩ	4.66V	900MΩ
UM40*30	0 to 40kV	0.75mA	0.05	1370pF	140kΩ	8.15V	900MΩ

주문 방법

ORDERING INFORMATION

Voltage	0 to 8kV	8
	0 to 10kV	10
	0 to 12kV	12
	0 to 15kV	15
	0 to 20kV	20
	0 to 25kV	25
	0 to 30kV	30
	0 to 35kV	35
	0 to 40kV	40
Polarity	Positive	P
	Negative	N
Power	Watts Output	4
	Watts Output	15
	Watts Output	30