FOUR-QUADRANT BIPOLAR AMPLIFIER
Ultra High Speed Response
- Output Voltage:
±75V or ±150V - output power:
75W to 300W - Frequency bandwidth:
DC to 1MHz - Wonder Broadband
Stable operation is possible regardless to loads with massive broadband and high speed response of DC to 1MHz maximum and four-quadrant output
DOA series is a four-quadrant bipolar amplifier realized broadband and ultra high speed response of DC to 1 MHz maximum.
They are best fitted to transient response tests using effectively this feature of massive high speed response. And, with the four-quadrant behavior usable as DC power supplies or DC electronic loads, they are applicable to various loads such as inductive loads as transformer, capacitive loads as capacitor or motors, piezo elements.
They are products with excellent general-purpose property able to output maximum current at DC output.
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
- High speed response of DC to 1 MHz or 500 kHz is realized.
- Four-quadrant behavior possible to source and sink current.
- DC bias function is equipped as standard.
- It is possible to output maximum current at DC output.
- Reassurance and safety design equipped with overvoltage protection, overcurrent protection, and output short-circuit protection.
Applications
- Evaluation tests for inductive loads such as coils and transformers.
- Voltage fluctuation tests for electric elements of cars.
- Evaluation tests for capacitive loads such as capacitors or display panels.
- Ripple test for capacitors.
- Evaluation tests of various motors.
- Evaluation tests of relative equipment to solar panels.
- Drive of piezo elements, etc.
Models
Each model will be brought to the market sequentially. Please confirm with our sales staff the detailed period of sale for the models you want prior to ordering.
Functions
Protections
Overvoltage Protection (OVP)
This unit is equipped with overvoltage protection and, the output voltage is limited to about 110% of the rating, and the load is protected at abnormal.
Overcurrent Protection (OCP)
This unit is equipped with overcurrent protection and output current is limited to about 110% of rating, and the power supply and the load are protected at overload.
High speed overcurrent protection
This unit is equipped with two kinds of overcurrent protection: a high-speed overcurrent protection circuit to limit pulse current and an overcurrent protection circuit to limit stationary current. The above-mentioned overcurrent protection limits stationary currents, and their response speed is about 1 msec. Another circuit to limit the current of the high-speed response type is added separately, and it restricts pulse current to about 2 times the rating at rectangular wave or capacitive load.
Output Range
This unit is a bipolar power supply that is possible to operate in four-quadrant behavior. It is able to source or sink current in the ranges as shown in the following figure.
Specifications
Options
- -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.
- -LVs
-
The output range is shifted
- Shifting following 3 ranges is possible for ±75 V output models.
- (L) -125 V to +25 V
- (M) -75 V to +75 V
- (H) -25 V to +125 V
- Shifting following 3 ranges is possible for ±150 V output models.
- (L) -250 V to +50 V
- (M) -150 V to +150 V
- (H) -50 V to +250 V
This knob is attached to the front panel.
How to Order
When ordering, add Option No. in the following order by alphabet to Model No.
[Example] DOA150-2-LNVs
Accessories
- Function Generator
-
- AC input cable
-
Standard CABLE TYPE1 
125 V/10 A 2.5 meters
Fixed lengthSold separately CABLE TYPE3 
250 V/10 A 2.5 meters
Fixed lengthSold separately CABLE TYPE4 
250 V/10 A 2.5 meters
Fixed length
Dimensions
Tech Notes
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.
Download
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-
DOA series Datasheet
Date: 2024-10-4 rev 11
PDF（1,622 KB）
-
Bipolar Power Supplies Selection Guide Via External Signal input
Date: 2024-12-12 rev.07
PDF (4,770 KB)
-
Bipolar Power Supplies/Amplifiers Selection Guide
Date: 2023-10-17 rev.03
PDF (6,310 KB)
-
DOA series Instruction Manual
Date: 2024-02-09 rev 0.0
PDF (1,162 KB)
Login Required
-
DOA series Datasheet
Date: 2024-10-4 rev 11
PDF（1,622 KB）
-
Bipolar Power Supplies Selection Guide Via External Signal input
Date: 2024-12-12 rev.07
PDF (4,770 KB)
-
Bipolar Power Supplies/Amplifiers Selection Guide
Date: 2023-10-17 rev.03
PDF (6,310 KB)
-
DOA series Instruction Manual
Date: 2024-02-09 rev 0.0
PDF (1,162 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.
