• U3/U6/U10 series
  • U3/U6/U10 series

U3/U6/U10 series

Input/Output Proportional High Voltage Power Supply

Well-shielded compact module

I/O Proportional HV Power Supplies (Ultra compact/Low noise)

These compact I/O proportional HV modules were designed with for OEM applications. They are ideal for PMT, MCP and radiation counter applications, or whenever less load regulation is required. Models below 6 kV feature an voltage isolation primary and secondary sides, just right for floating applications. With a wide lineup ranging from 300 V to 25 kV and 3 W to 10 W, you are sure to find a model that is the most suitable for your needs.

Features

  • Ultra compact, light weight and I/O proportional
  • Low noise
  • High reliability
  • I/O isolated (models up to 6 kV)
  • Detachable input connector
  • Aluminum housing

Applications

Models

U3 series

Model Output Minimum Load [Ω] Ripple [%p-p] I/O Isolation [Vdc]
Voltage [kV] max Range [kV] Current [mA]
U3-0.3PN 0.3 0.02 to 0.3 10 30 K 0.12 2000
U3-0.6PN 0.6 0.04 to 0.6 5 120 K
U3-1.1PN 1.1 0.1 to 1.1 2.75 400 K
U3-1.5PN 1.5 0.1 to 1.5 2 750 K
U3A-2PN 2 0.2 to 2 1.5 1.3 M 2500
U3A-3PN 3 0.2 to 3 1 3 M 3500
U3A-6PN 6 0.4 to 6 0.5 12 M 0.15 7000

Positive polarity output

Model Output Minimum Load [Ω] Ripple [%p-p] I/O Isolation [Vdc]
Voltage [kV] max Range [kV] Current [mA]
U3A-10P 10 0.8 to 10 0.25 40 M 0.05 -
U3A-15P 15 1.2 to 15 0.2 75 M
U3A-25P 25 2 to 25 0.1 250 M

Negative polarity output

Model Output Minimum Load [Ω] Ripple [%p-p] I/O Isolation [Vdc]
Voltage [kV] max Range [kV] Current [mA]
U3A-10N 10 0.8 to 10 0.25 40 M 0.05 -
U3A-15N 15 1.2 to 15 0.2 75 M
U3A-25N 25 2 to 25 0.1 250 M

U6 series

Model Output Minimum Load [Ω] Ripple [%p-p] I/O Isolation [Vdc]
Voltage [kV] max Range [kV] Current [mA]
U6A-0.3PN 0.3 0.03 to 0.3 20 15 K 0.15 2000
U6A-0.6PN 0.6 0.05 to 0.6 10 60 K
U6A-1.1PN 1.1 0.1 to 1.1 5.5 200 K
U6A-1.5PN 1.5 0.1 to 1.5 4 375 K
U6A-2PN 2 0.2 to 2 3 0.65 M 0.2 2500
U6A-3PN 3 0.2 to 3 2 1.5 M 3500
U6A-6PN 6 0.3 to 6 1 6 M 7000

Positive polarity output

Model Output Minimum Load [Ω] Ripple [%p-p] I/O Isolation [Vdc]
Voltage [kV] max Range [kV] Current [mA]
U6A-10P 10 0.5 to 10 0.5 20 M 0.05 -
U6A-15P 15 0.8 to 15 0.4 37 M
U6A-25P 25 1.4 to 25 0.2 125 M

Negative polarity output

Model Output Minimum Load [Ω] Ripple [%p-p] I/O Isolation [Vdc]
Voltage [kV] max Range [kV] Current [mA]
U6A-10N 10 0.5 to 10 0.5 20 M 0.05 -
U6A-15N 15 0.8 to 15 0.4 37 M
U6A-25N 25 1.4 to 25 0.2 125 M

U10 series

Model Output Minimum Load [Ω] Ripple [%p-p] I/O Isolation [Vdc]
Voltage [kV] max Range [kV] Current [mA]
U10A-0.6PN 0.6 0.06 to 0.6 15 40 K 0.1 2000
U10A-1.1PN 1.1 0.1 to 1.1 10 110 K 0.15
U10A-1.5PN 1.5 0.15 to 1.5 8 190 K
U10A-2PN 2 0.2 to 2 6 330 K 0.2 2500
U10A-3PN 3 0.3 to 3 4 950 K 0.2 3500
U10A-6PN 6 0.6 to 6 2 3 M 0.3 7000

Positive polarity output

Model Output Minimum Load [Ω] Ripple [%p-p] I/O Isolation [Vdc]
Voltage [kV] max Range [kV] Current [mA]
U10A-10P 10 1 to 10 1 10 M 0.2 -
U10A-15P 15 0.15 to 15 0.6 25 M 0.08
U10A-25P 25 2.4 to 25 0.33 75 M

Negative polarity output

Model Output Minimum Load [Ω] Ripple [%p-p] I/O Isolation [Vdc]
Voltage [kV] max Range [kV] Current [mA]
U10A-10N 10 1 to 10 1 10 M 0.2 -
U10A-15N 15 0.15 to 15 0.6 25 M 0.08
U10A-25N 25 2.4 to 25 0.33 75 M

Specifications

For details, download the datasheet below.

Options

CN3U: Assembled input connector (Accessory for C2, C3, C4 Case models)

connector with 25 cm flying leads

CN8U: Assembled input connector (Accessory for C5, C6 Case models)

connector with 25 cm flying leads

Diagram

Connection Diagram

For details, download the datasheet below.

Dimensions

For details, download the datasheet below.

Notes

Application notes

Normal Operation

  • Case (blue wire), input (black wire) and output are not connected inside for models 6 kV and below.
    Case, input and output wires must be connected to the earth ground for safety.
  • Case (no lead wire) and input (black wire) are connected inside for models 10 kV and up. Input wire must be connected to the earth ground for safety. Models 10 kV and up has no * in below diagrams.
  • In case of floating the power supply, refer [Operation of HV floating]
  • U3: up to 15 V
  • U6: up to 24 V
  • U10: up to 24 V
Normal Operation
Normal Operation
  1. Make sure the connection to the HV power supply is done as per the above diagram before operation.
  2. Input the specified input voltage to the power supply to control the output voltage.
  3. Models 6 kV and below of U3 series has no output discharge resistor. Add resistors for discharge when connected to a capacitive load.
  4. Turn off input voltage when ending the power supply operation.

How to read output voltage and/or output current

  • C = 0.1 to 1μF pass capacitor
  • In addition to the above diagram, inserting resistor instead of voltmeter or ammeter and reading the voltage of the edges of resistor with DVM will work too.
How to read output voltage and/or output current

Parallel operation (to increase output current)

  • This circuit is good only for identical models. Avoid parallel operation of different model.
Parallel operation (to increase output current)

How to reduce the output ripple noise

  • L = 1m to 5 mH (resistor will work too)
  • C = 0.01 to 0.1μF (make sure the enough dielectric voltage for capacitor)
With this circuit the noise on the power supply side will be smaller too

How to reduce the influence to power supply by suppressing input ripple

  • Connecting to the earth ground shall be at one point
  • L = more than 100 μH
  • C = more than 100 μF/35 V
How to reduce the influence to power supply by suppressing input ripple

In case there is not enough input voltage for desired output voltage

When larger load regulation is expected

With this circuit the noise on the power supply side will be smaller too.

In case there is not enough input voltage for desired output voltage
When smaller load regulation is expected

Add capacitors of approx. 0.01 to 0.1 μF on the output in order to reduce the voltage of output ripple noise. (make sure the enough dielectric voltage for capacitor)

voltage of output ripple noise

Floating Operation

  • Models of 6 kV and below is input/output isolated type, and can be operated with output floating.
  • Case (blue wire), input (black wire) and output are not connected inside for models 6 kV and below. Case and input must be connected to the earth ground for safety.
  • U3: up to 15 V
  • U6: up to 24 V
  • U10: up to 24 V
Floating Operation
Floating Operation
  1. Make sure the connection to the HV power supply is done as per the above diagram before operation.
  2. Input the specified input voltage to the power supply to control the output voltage.
  3. There might be common mode noise on the output when floating operation. Impedance of Ef shall be low.
  4. Turn off input voltage when ending the power supply operation.

NOTE

  • These power supplies are designed and manufactured with safety of high voltage power supplies as integrated type. For extra safety, ground wiring must be done properly as per [Normal operation] and [Operation of HV floating].
  • Avoid output short circuit for long period of time.
  • Do not touch the HV output wire right after turning off the power supply because there is a possibility of residue high voltage. Before touching the output wire make sure the output voltage is low enough, or wait for 20 minutes. When there is a capacitive load or load is open, discharge the load before touching the output as it can take a long time before the output voltage becomes low enough.

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High Voltage power supplies (Chassis Mount/PCB Mount)