Fast Response
Four-Quadrant Bipolar Power Amplifier
- Voltage range:
±20V to ±60V - Current:
±2.5A to ±100A - Power:
150W to 2000W - Fast response:
DC to 200kHz
Fast response four-quadrant bipolar amplifier
DOS series is four-quadrant bipolar amplifier with high-speed response of DC to 200 kHz (CV mode). It shall output various waveforms including sinusoidal, triangular, saw-tooth, rectangular and more with combination with a function generator. As DOS series amplifies any waveform, it is suitable for all sorts of simulation tests. Sourcing and sinking of electrical power with four-quadrant operation as well as 2 operation modes of CV and CC is possible. Compact size for such various function and ultra high-speed response power supply. In addition, the features of large meters with high visibility and superior operability make the DOS series versatile four quadrant bipolar power supply which can be used a wide variety of occasion from in laboratory to production line.
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
- Fast response
-
Suitable for transient response test because of its ultra-high-speed response DC to 200 kHz and high power, maximum 2000 W.
- Four-quadrant action
-
DOS series can be used both as a high-speed response DC power supply and as a DC electronic load.
- DC bias
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10-turn potentiometer to be used as the output setting volume when used as the DC power supply and as the bias setting dial at outputting AC waveform is equipped.
- Constant Voltage (CV)/Constant Current (CC)
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A single switch selects between CV and CC modes.
- Compact & Lightweight
-
For maximum compactness and lightweight, the DOS series has been improved for small footprint and handiness.
- DC output meter equipped
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3-digit digital meter displays the DC value of the output voltage and current. (The option of rms indication is available.)
- Complete protective functions
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Protective functions against overvoltage/overcurrent and against output short-circuit are completely provided.
- Master/Slave
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Master/Slave control (option) for more power requirement. Both the Master unit and Slave unit are usable as the individual amplifiers. (Frequency response will vary in case of master/slave operation, please ask sales staff.)
Applications
- Inductive load such as coil and transformer
- Various motor tests
- Evaluation test for solar panel-related devices
- Ripple test of capacitors
- Voltage regulation tests for in-vehicle electrical component
- For surface treatment
Models
* Models with voltage, current, or frequencies not listed here are also available. Please contact the nearest sales office.
| Model | Maximum output | ||
|---|---|---|---|
| Voltage | Current | Power | |
| DOS20-7.5 | ±20 V | ±7.5 A | 150 W |
| DOS20-15 | ±20 V | ±15 A | 300 W |
| DOS20-30 | ±20 V | ±30 A | 600 W |
| DOS20-60 | ±20 V | ±60 A | 1200 W |
| DOS20-100 | ±20 V | ±100 A | 2000 W |
| DOS25-6 | ±25 V | ±6 A | 150 W |
| DOS25-12 | ±25 V | ±12 A | 300 W |
| DOS25-24 | ±25 V | ±24 A | 600 W |
| DOS25-48 | ±25 V | ±48 A | 1200 W |
| DOS25-80 | ±25 V | ±80 A | 2000 W |
| DOS45-3.3 | ±45 V | ±3.3 A | 150 W |
| DOS45-6.6 | ±45 V | ±6.6 A | 300 W |
| DOS45-13.3 | ±45 V | ±13.3 A | 600 W |
| DOS45-16 | ±45 V | ±16 A | 720 W |
| DOS45-26.7 | ±45 V | ±26.7 A | 1200 W |
| DOS45-44.4 | ±45 V | ±44.4 A | 2000 W |
| DOS60-2.5 | ±60 V | ±2.5 A | 150 W |
| DOS60-5 | ±60 V | ±5 A | 300 W |
| DOS60-10 | ±60 V | ±10 A | 600 W |
| DOS60-20 | ±60 V | ±20 A | 1200 W |
| DOS60-33.3 | ±60 V | ±33.3 A | 2000 W |
Functions
Protective Functions
Overvoltage Protection (OVP)
DOS 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.
* It is possible to set variable 0% to approx 110% output voltage range with -LVc option.
Overcurrent Protection (OCP)
DOS 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.
* It is possible to set variable 0% to approx 110% output voltage range with -LCc option.
High speed overcurrent protection
DOS 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 msec.
Additional high speed overcurrent protection can limit pulse current of square waveforms or from a capacitive load at approx 2 times rated current.
Output Range
DOS series is a bipolar power supply that can perform four-quadrant operation. They can supply (source) and absorb (sink) current in the field of the drawing on the right.
Characteristic of Amplifier
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 200 kHz or lower, tr = tf = around 1.8 μs, at 100 kHz or lower, tr = tf = around 3.5 μs
Response speed
When accurate output waveforms are required, select an amplifier with a frequency bandwidth higher enough than the operating frequency.
In the case of using sine waves, 3 to 5 times more frequency bandwidth is required, and around 10 times more in the case of square waves in general.
Inadequate bandwidth causes not only a 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 Ω (at 0.1 μF) to 1000 Ω (at 1000 pF) of high-voltage resistance in the output in series. Please note that the frequency band is limited when using an amplifier with a capacitive load, as shown in the formula on the right.
In addition, when an amplifier is used for a corona discharge, a current higher than its rating will flow, and it will affect the amplifier badly. In this case, as well as when using an amplifier with a capacitive load, please install the output resistance and limit the current.
* Please avoid continuous input of the high-frequency signal, which reduces the output frequency of an amplifier. An amplifier will break because of an increase in internal loss.
Specifications
Options
- -LCc
-
Output current limit
Variable from 0 to approx 110% with the dial on the front panel
- -LF
-
Floating ground (withstand voltage 200 Vdc)
- -LMsm, -LMss
-
Master/Slave control (parallel operation)
Maximum 3 units including master unit are hooked. "-LMsm" for the master unit and "-LMss" for slave units.
Please order the required number of units. Every master and slave unit is exclusive use, but it can also be operated independently.
If you want to change the master-slave combination, it will need to be readjusted at our factory.
- -LN
-
Automatic output recovery (previous: 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.
- -LPr
-
rms display
- -LVc
-
Output voltage limit
Variable from 0 to approx 110% with the dial on the front panel
- -L(220V)
-
200 Vac to 240 Vac ±10% single phase, 50 Hz/60 Hz input
(150 W and 300 W models only)
How to Order
- When ordering, add Option No. in the following order by alphabet and input voltage to Model No.
- <Example> DOS25-12-LCcDFMsmNPrSVc(220V)
Accessories
- Function Generator
-
Dimensions
Download
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-
DOS series Datasheet
Date: 2024-10-09 rev.14
PDF (1,686 KB)
-
Bipolar Power Supplies Selection Guide Via External Signal input
Date: 2023-07-26 rev.05
PDF (5,471 KB)
-
Bipolar Power Supplies/Amplifiers Selection Guide
Date: 2023-10-17 rev.03
PDF (6,310 KB)
-
DOS series Instruction Manual
Date: 2022-7-25 rev 0.7
PDF (1,219 KB)
Login Required
-
DOS series Datasheet
Date: 2024-10-09 rev.14
PDF (1,686 KB)
-
Bipolar Power Supplies Selection Guide Via External Signal input
Date: 2023-07-26 rev.05
PDF (5,471 KB)
-
Bipolar Power Supplies/Amplifiers Selection Guide
Date: 2023-10-17 rev.03
PDF (6,310 KB)
-
DOS series Instruction Manual
Date: 2022-7-25 rev 0.7
PDF (1,219 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.
