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  • DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision
  • DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

ULTRA HIGH SPEED BIPOLAR POWER SUPPLY

  • Voltage range: ±20V to ±60V
  • Power: 150W to 2000W
  • Frequency bandwidth:
    DC to 200kHz
  • Built-in function generator as standard

Ultra fast response Four-quadrant bipolar power supply built-in function generator

The DOSF series is equipped with a built-in function generator enabling its compact size and ultra-fast response. Any waveform can be programmed easily from the front panel, and it features memory settings and protection functions. With communication options, external control is available. You can use this DOSF series as an ultra-high-speed bipolar amplifier enabling an external signal input.

FEATURES AND BENEFITS

  • Ultra-fast response of DC to 200 kHz
  • Function generator as standard
  • Waveform with less distortion by DDS method (DC to 200 kHz sine wave, square wave, and triangle wave)
  • Individual setting of DC/AC output and CV/CC mode, making the unit user-friendly with simple operability (DC to 200 kHz in CV mode and DC to 100 kHz in CC mode for sine wave, square wave, and triangle wave)
  • External control with communication options (USB, LAN, RS-232C, RS-485, and GPIB)
  • High legibility with LCD display using high contrast white LED backlight
  • Waveform generation, sequence operation, and various measurements on a single power supply
  • All settings and operations only on the front panel
  • Up to 6000W with Master-Slave operation
Output range

APPLICATIONS

  • Driving capacitive loads (capacitors)
  • Biasing inductive loads (coils, transformers, etc.)
  • Various motor testing
  • Solar inverters (PV inverters)
  • Evaluation test for solar panel related devices

Note: We do not design this bipolar power supply for charging and discharging batteries.
For battery charge and discharge application, please refer to the Battery Cycle Tester product page.

Models

* Consult with our sales office about different specifications from the following list.

Model Output
Voltage Current Power
DOSF20-7.5 ±20 V ±7.5 A 150 W
DOSF20-15 ±15 A 300 W
DOSF20-30 ±30 A 600 W
DOSF20-60 ±60 A 1200 W
DOSF20-100 ±100 A 2000 W
DOSF25-6 ±25 V ±6 A 150 W
DOSF25-12 ±12 A 300 W
DOSF25-24 ±24 A 600 W
DOSF25-48 ±48 A 1200 W
DOSF25-80 ±80 A 2000 W
DOSF45-3.3 ±45 V ±3.3 A 150 W
DOSF45-6.6 ±6.6 A 300 W
DOSF45-13.3 ±13.3 A 600 W
DOSF45-16 ±16 A 720 W
DOSF45-26.7 ±26.7 A 1200 W
DOSF45-44.4 ±44.4 A 2000 W
DOSF60-2.5 ±60 V ±2.5 A 150 W
DOSF60-5 ±5 A 300 W
DOSF60-10 ±10 A 600 W
DOSF60-20 ±20 A 1200 W
DOSF60-33.3 ±33.3 A 2000 W

Functions

Basic Waveform Generation

DOSF is equipped with a built-in function generator that produces basic waves such as sine, rectangular, and triangle waves.
The frequency range can be set between 1 Hz and 200 kHz. You can adjust amplitude; start phase (for sine wave), on-phase control (for sine wave), and duty ratio (for rectangular/triangle wave).

Start phase (90 deg)
Start phase (90 deg) | DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision
On-phase control (+90 deg)
On-phase control (+90 deg) | DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision
On-phase control (–180 deg)
On-phase control (–180 deg) | DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

Application

Power activation test, Inrush current measurement, waveform fluctuation test

Sequence Functions

The DOSF series is equipped with programmable sequence functions such as step time, step amplitude ramp, CV/CC mode, frequency sweep, AC superposition, step jump, and jump times. These useful functions help to program the desired waves in very flexible manner, enabling to support laboratory and research works efficiently.
If amplifier’s output turns off while it is running a sequence program halfway through, the leftover sequence will not run but it is re-activated from the beginning of the original sequence.

  • Step time: 10 ms to 1999 s 999 ms (resolution: 1 ms), ramp and AC waveform is 50 ms
  • Up to 16 steps per program and settings for 3 programs can be saved.
  • Can be set CV/CC mode per program
  • Frequency: Infinite, 1 to 999
Program image
Program image | DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

Sequence functions help to create complicated waves like below to be simply and easily edited.

Pulse current variation
Pulse current variation | DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision
Ripple current superposition
Ripple current superposition | DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision
AC voltage fluctuation
AC voltage/ frequency variation | DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision
DC voltage interruption
DC voltage interruption | DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision

Applications

Testing of motors, pulse power supply and various evaluation

Measurement Functions

The DOSF series is equipped with programmable sequence functions such as step length, step amplitude ramp, CV/CC mode, frequency sweep, AC superposition, step jump, and jump times. These useful functions help to program the desired waves in a very flexible manner, enabling to support laboratory and research works efficiently.

ex) measure AC waveform
Measurement functions
ex) measure DC + AC waveform
Measurement functions

Memory Functions

During fundamental wave operation, output voltage (in CV mode), output current (in CC mode), CV/CC setting, and waveform settings can be saved in 10 set-up memories.

As sequence programs can be saved in up to three, it is useful when using frequently used multiple waveforms or sequence operations.

Other functions:
DOSF is equipped with Protection function, Key-lock function, and CV/CC switching, as standard options.

Specifications

For details, download the datasheet below.

Options

* Selecting each individual option simultaneous in -LUs1, -LEt, and -LGob is not allowed.

-LD

Interlock

-LEt

LAN interface port *
Enable digital control via LAN

[Control items]
Output ON/OFF, Voltage/Current setting (AC and DC), Switch of constant voltage/constant current, Frequency setting, Waveform setting (sine wave, square wave, and triangle wave), Phase setting (sine wave), Duty setting (square wave and triangle wave)

-LF

Floating ground (withstanding voltage of 200 Vdc)
The negative terminal of the output can be floatable up to 200 V. However, please take note that the external control signal source (such as a function wave generator) and the common measuring device that connects to the amplifier's monitor terminal will also become floating potential in this case.

-LGob

Optical interface port *
This option changes the standard interfaces to a built-in optical interface port. By combining this option with an adapter for optical connection (sold separately), communication between the control device and the power supply can be controlled in an isolated state. Be sure to select this option when using the product in the following environments.

  • -LGob: Optical interface port + optical cable 2 meters
  • -LGob(Fc5): Optical interface port + optical cable 5 meters
  • -LGob(Fc10): Optical interface port + optical cable 10 meters
  • -LGob(Fc20): Optical interface port + optical cable 20 meters
  • -LGob(Fc40): Optical interface port + optical cable 40 meters

Select the optional optical interface port (-LGob) when using the bipolar power supply under the following conditions.

  • Noisy environments such as factories (example: when motors or coils are used near loads or power sources).
  • If this power supply and your controller (PC or PLC) cannot be installed within 2 meters.
  • When there is a possibility of arcing or output short-circuit.

[Control items]
Output ON/OFF, Voltage/Current setting (AC and DC), Switch of constant voltage/constant current, Frequency setting, Waveform setting (sine wave, square wave, and triangle wave), Phase setting (sine wave), Duty setting (square wave and triangle wave)

-LMsm, -LMss

Master/Slave control
“-LMsm” for Master unit, or “-LMss” for slave unit. Master unit or slave units are to be set at the factory, and if the master-to-slave change is required after shipment, adjustment at the factory will be needed. A maximum of three units including the master unit can be connected.

-LS

External output ON/OFF (Output ON/OFF)

-LUs1

USB interface port *
Enable digital control via USB

Control items
Output ON/OFF, Voltage/Current setting (AC and DC), Switch of Constant Voltage/Constant Current, Frequency setting, Waveform setting (sine wave, square wave, and triangle wave), phase setting (sine wave), Duty setting (square wave and triangle wave)

-L(220V)

Changing the input voltage
200 Vac to 240 Vac ±10% single phase, 50 Hz/60 Hz input (150 W and 300 W models only)

* Selecting each individual option simultaneous in -LUs1, -LEt, and -LGob is not allowed.

How to order

When ordering, add Option No. in the following order by alphabet, and number to Model No.
<Example> DOSF60-20-LDFMsLMsmSUs1, DOSF20-100-LDFGob(FC20)LMssS

Accessory

Interface adapters

To use the optical interface, you need to prepare an optical interface adapter separately. The following interface adapters are available according to your controller port.

  • CO-E32: LAN to optical interface adapter
  • USB-OPT: USB to optical interface adapter
  • CO-OPT2-9: RS-232C (9 pin) to optical interface adapter
  • CO-OPT2-25: RS-232C (25 pin) to optical interface adapter
  • CO-OPT4-25: RS-485 (25 pin) to optical interface adapter
  • CO-G32: GPIB to optical interface adapter (Discontinued in December 2028)
Example of communication with optical fiber
Example of communication with optical fiber | DOSF series | Bipolar power supply (Low Voltage Amplifiers) | Matsusada Precision
For details, refer to CO/USB series.
AC INPUT CABLE
Standard
up to 300 W model		 CABLE TYPE2 CABLE TYPE2 | AC input cable | Matsusada Precision
Power input end 		CABLE TYPE2 | AC input cable | Matsusada Precision
Input plug 		125V/15A
Standard
more than 600 W model		 CABLE TYPE5 CABLE TYPE5 | AC input cable | Matsusada Precision
Power input end 		CABLE TYPE5 | AC input cable | Matsusada Precision
Input plug 		300V/25A
PSS2en series

PSS2en is the dedicated software that can actuate various power supplies, electronic loads, and digital controllers for power supplies manufactured by Matsusada Precision Inc. with a simple setup.
It is perfect for the aging test, the burn-in test and the withstand voltage test for electronic parts, and for the endurance test, intermittent/continuous operation test, or various simulation tests for electric components of automobiles.
For details, refer to PSS2en page.

PSS2en | Application software for power supplies and electronic loads | Matsusada Precision

Dimensions

For details, download the datasheet below.

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