FOUR-QUADRANT FAST RESPONSE BIPOLAR POWER SUPPLY
- Voltage range: ±10V to ±60V
- Power: 50W, 60W
- Frequency bandwidth:
DC to 30kHz - Light Weight:
3 kg
Four-Quadrant Fast Response Bipolar Power Supply
DJOP 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 5.51 inches(140 mm) width, and weigh 3 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. All the models are completely solid-state with output voltage between ±10 V to ±60 V. DJOP series is most appropriate for evaluation test such as solar panels,the instruments driven by battery and the IC which control battery.
Even faster models, the models with function generator and more high power models are available. Contact to local sales office for details.
FEATURES AND BENEFITS
- Response speed
- Newly developed DJOP series is the most appropriate for transient response test with such high power and broad bandwidth.
- Four-quadrant action
- DJOP series can be used both as a high speed response DC power supply and as an electronic load.
- 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. (The option of rms indication is available.)
- Compact & light weight
- For maximum compactness and light weight, DJOP series has been improved for a small footprint and easy carry.
- Constant voltage (CV)/Constant current (CC)
- A single switch selects between CV and CC modes.
- Wide range of products
- Select a model fitting for your applications from our wide range of output voltage and current.
- Complete protective function
- Protective function against overvoltage/overcurrent 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 for the following list.
Model | Maximum output | ||
---|---|---|---|
Voltage | Current | Power | |
DJOP10-5 | ±10V | ±5A | 50W |
DJOP20-3 | ±20V | ±3A | 60W |
DJOP30-2 | ±30V | ±2A | 60W |
DJOP60-1 | ±60V | ±1A | 60W |
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 ![]() |
Rocker switch ![]() |
For further information, please contact our sales representatives.
Functions
Protections
Overvoltage protection (OVP)
DJOP 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)
DJOP 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
DJOP 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 1 ms. Additional high speed overcurrent protection can limit pulse current of square waveforms or from capacitor at approx. 2 times more current of rating.

Output range
DJOP 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.

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 |
Rise time
(Stepping time): The response time is sometimes described by the rise time (as shown in the drawing on the right). The rise time of an amplifier at a response speed of (= frequency bandwidth) Fc (Hz) is generally acquired by "tr ≒ 0.35/fc." Fall time tf is the same as tr.
Frequency bandwidth: at 30kHz or lower, tr = tf = around 12 µs

Response speed
When accurate output waveforms are required, select a amplifier with a frequency bandwidth higher enough than the operating frequency. In case of using sine waves, 3 times to 5 times more frequency bandwidth is required, and around 10times more in case of square waves in general. Inadequate bandwidth causes not only decrease in the output amplitude but much difference between the input and output phases. Therefore operating the product while monitoring the actual output waveforms is recommended.

Inductive load
Some inductance of inductive load may cause resonance in CC mode. In such cases, connect a C-R series circuit between output terminals to prevent resonance.
Capacitive Load
When a capacitive load is more than 100 pF (including a stray capacitance of output wire), the resonance in the output may occur. In that case, install 100-ohm (@0.1 μF) to 1000-ohm (@1000 pF) of high voltage resistance in the output in series. Please note that the frequency band will be limited as the formula written in the right figure when an amplifier is used with a capacitive load.
In addition, when an amplifier is used for the use such as a corona discharge, the current which is higher than rating will flow and it will affect the amplifier badly. In this case, as well as the time to use an amplifier with a capacitive load, please install the output resistance and limit the current.
* Please avoid continuous inputting of high frequency signal which reduces output frequency of an amplifier. An amplifier will be broken because of increase of internal loss.

Specifications
Options
- -LN
Output state auto-recovery (former: no power failure protection)
- This option retains the output state when recovering from an input power interruption, such as an AC power switch ON/OFF or a power failure. Therefore, there is no need to reset the protection status by turning off the OUTPUT switch once.
Caution: If you turn on the power while the OUTPUT setting is ON, the output will be ON.
How to Order
When ordering, add "-LN" after Model No.
Accessories
AC Input Cable
Standard | CABLE TYPE1 | 125 V / 10 A | 2.5 meters Fixed length |
||
---|---|---|---|---|---|
Sold separately | CABLE TYPE3 | 250 V / 10 A | 2.5 meters Fixed length |
||
Sold separately | CABLE TYPE4 | 250 V / 10 A | 2.5 meters Fixed length |
Dimensions
Download
-
DJOP series Datasheet
Date: 2023-07-26 rev.15
PDF (1,245 KB)
-
Bipolar Power Supplies Selection Guide Via External Signal input
Date: 2023-07-26 rev.05
PDF (5,471 KB)
-
DJOP series Instruction Manual
Date: 2020-05-26 rev0.5
PDF (517 KB)
The account registration is necessary for downloading
-
DJOP series Datasheet
Date: 2023-07-26 rev.15
PDF (1,245 KB)
-
Bipolar Power Supplies Selection Guide Via External Signal input
Date: 2023-07-26 rev.05
PDF (5,471 KB)
-
DJOP series Instruction Manual
Date: 2020-05-26 rev0.5
PDF (517 KB)
In this website, we provide only the latest version of information including instruction manuals as of our products. Therefore, the newest versions of manuals on the website might be not same as the ones of products you purchased in the past.