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

Four-quadrant Fast Response
Bipolar Power Amplifier

  • Output Voltage:
    0 to ±45V
  • Max output power: 240W
  • Frequency bandwidth:
    DC to 100kHz
  • DC bias

Four-quadrant bipolar power Amplifier which source and sink electric power

DHOP series is four-quadrant bipolar power supply which source and sink electric power. They can be used in 2-mode of a constant voltage (CV) or a constant current (CC). Thanks to the original design, phenomenal light weight and compact size power supply, which is 8.27 inches (210 mm) width, and weigh 7 kg has been achieved.
They are ultra compact and high speed, driving output proportional to the input waveform such as a sine wave, triangular wave, saw wave, and square wave. DHOP series is most appropriate for evaluation test such as solar panels, the instruments driven by battery and the IC which control battery.

Note: This product is not designed for charge and discharge of battery.
For battery charging and discharging applications, please refer to the Battery Cycle Tester product page.

Features and Benefits

Response speed
Newly developed DHOP series is the most appropriate for transient response test with such high power and broad bandwidth.
DC bias
10-turn potentiometer to be used for the output setting volume when used as the DC power supply and for the bias setting when used as AC power supply is equipped.
DC output meter
3-digit digital meter displays the DC value of the output voltage and current.
Compact & light weight
For maximum compactness and light weight, DHOP Series has been improved for small footprint and easy carry.
CV (constant voltage)/CV (constant current)
A single switch selects between CV and CC modes.
Four-quadrant action
DHOP series can be used both as a high speed response DC power supply and as an electronic load.
Complete protective function
Protective function against over voltage/current and protective measures against output short-circuit are completely provided.

Applications

  • Suitable to evaluate battery driven equipment to use as a simulated battery
  • Inductive load such as coil and transformer
  • Capacitive load like capacitor
  • Various motor tests
  • Voltage regulation tests for in-vehicle electrical component
  • Evaluation test for solar panel related devices
  • For surface treatment

Models

* Please consult with our sales office about the specifications except the following list.

Model Maximum output Frequency bandwidth (-3dB)
Voltage Current Power
DHOP20-12 ±20 V ±12 A 240 W CV mode: DC to 100 kHz
CC mode: DC to 10 kHz
DHOP45-5 ±45 V ±5 A 225 W
Even faster model, DOS series, amplifier with function generator, DOPF series, or more high power model, DOP series, are available. Contact to local sales office for details.

Notice of POWER switch changes

We inform you of the power switch changes on the front panel as in the diagram below for shipment from June, 2020.

Before After
Push button switch
Push button switch
Rocker switch
Rocker switch

Functions

Protections

Overvoltage protection (OVP)

DHOP series is equipped with overvoltage protection, which protects load by limiting voltage up to approx. 110% of the rated output voltage even at abnormal conditions.

Overcurrent protection (OCP)

DHOP series is also equipped with overcurrent protection, which protects power supplies and load by limiting current up to approx. 110% of the rated output current.

High speed overcurrent protection

DHOP series is provided with 2 types of overcurrent protections, high speed overcurrent protection to limit the pulse current, and standard overcurrent protection to limit the static current.
The standard overcurrent protection limits the static current, responding at around 1ms. Additional high speed overcurrent protection can limit pulse current of square waveforms or from capacitor at approx. 2 times more current of rating.

High speed overcurrent protection

Output range

DHOP series is a bipolar power supply which can perform four-quadrant operation. They can supply (source) and absorb (sink) current in the field of the drawing on the right.

Output range

CV/CC setting selection

Inputting voltage via Vcon-in enables the control of output voltage V when CV control is selected and output current A when CC control is selected.

In CV mode In CC mode
Vcon Output voltage Output current
-10 V -Rating -Rating
0 V 0 V 0 A
+10 V +Rating +Rating

Use of BIAS

When the "BIAS ON/OFF switch" is flipped to ON, bias can be changed with the "BIAS setting dial." Bias of the voltage can be set when CV control is selected, and that of the current can be when CC control is selected.

In CV mode In CC mode
Scale Output voltage Output current
000 (ccw) -Rating -Rating
500 0 V 0 A
1000 (cw) +Rating +Rating

Specifications

For details, download the datasheet below.

Options

-LD

Interlock

-LN

No protection against blackout

-LS

Remote switch (Output ON/OFF)

How to Order

When ordering, add Option No. in the following order by alphabet to Model No.

Example: DHOP45-5-LDNS

Accessories

Function Generator

AC input cable

[Standard] CABLE TYPE1 CABLE series | AC input cable | Matsusada Precision CABLE series | AC input cable | Matsusada Precision 125 V / 10 A 2.5 meters

Fixed length

[Sold separately] CABLE TYPE3 CABLE series | AC input cable | Matsusada Precision CABLE series | AC input cable | Matsusada Precision 250 V / 10 A 2.5 meters

Fixed length

[Sold separately] CABLE TYPE4 CABLE series | AC input cable | Matsusada Precision CABLE series | AC input cable | Matsusada Precision 250 V / 10 A 2.5 meters

Fixed length

Dimensions

For details, download the datasheet below.

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