DHOP Series
DHOP series are four-quadrant bipolar power supplies which source and sink electric power.
Four-quadrant fast response bipolar power supplies
DHOP series are four-quadrant bipolar power supplies which source and sink electric power. They can be used in 2-mode of a CV (constant voltage) or a CV (constant current). Thanks to the original design, phenomenal light weight and compact size power supply, which is 8.3" (210mm) width, and weigh 7kg 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.
| 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. |
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
Features
1. Response speed
Newly developed DHOP series is the most appropriate for transient response test with such high power and broad bandwidth.
2. 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 suppluy is equipped.
3. DC output meter
3-digit digital meter displays the DC value of the output voltage and current.
4. Compact & light weight
For maximum compactness and light weight, DHOP Series has been improved for small footprint and easy carry.
5. CV (constant voltage) /CV (constant current)
A single switch selects between CV and CC modes.
6. Four-quadrant action
DHOP series can be used both as a high speed response DC power supply and as an electronic load.
7. Complete protective function
Protective function against over voltage/current and protective measures against output short-circuit are completely provided.
Specification
Protections
OVP (Over voltage protection)
DHOP series is equipped with over voltage protection, which protects load by limiting voltage up to approx. 110% of the rated output voltage even at abnormal conditions.
OCP (Over current protection)
DHOP series is also equipped with over current protection, which protects power supplies and load by limiting current up to approx. 110% of the rated output current.
High speed over current protection
DHOP series is provided with 2 types of over current protections, high speed over current protection to limit the pulse current, and standard over current protection to limit the static current.
The standard over current protection limits the static current, responding at around 1ms. Additional high speed over current protection can limit pulse current of square waveforms or from capacitor at approx. 2 times more current of rating.
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.
Functions
CV/CC setting selectionAmplifier DHOP Series CV/CC
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.
Use of BIASAmplifier DHOP Series 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.
AC input cable
Options
-LDDoor switch (Interrock)
-LSRemote switch (Output ON/OFF)
How to Order When ordering, suffix the following option mark to the model number.
DHOP45-5-LDS (Alphabetical order)
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 100kHz or lower, tr = tf = around 3.5μsM
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 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.
Capacitative load
Capacitative load may cause oscillation.
In such cases, placed a power resistance in series with the output.
Be careful that the frequency bandwidth is limited depending on the resistance and capacitance placed in series when capacitative load.
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.
