Generally speaking, the DC power supply has two working modes of CV/CC, corresponding to two internal loops (CV control loop and CC control loop). Most power supplies on the market today are designed with a voltage-priority mode that does not provide a current loop control priority mode; however, as the need for electronic testing changes, the limitations of this approach are also reflected, with the CV control loop prioritized. Although the voltage rise rate can be accelerated to some extent, it cannot be applied to the occasions where the current overshoot test is demanding. The IT6100B high-speed, high-precision programmable DC power supply series breaks through innovation and proposes the industry's latest CC/CV priority concept, which can help users solve various serious problems in long-term test applications, making applications such as high-speed power supply or no overshooting. More flexible and more cost-effective to test equipment.
The high-speed and high-precision programmable DC power supply series introduces the CC/CV priority concept. Users can realize the CC control loop through the power menu interface, and set the CV control loop priority level to meet diversified and multi-domain applications without additional purchase. Great cost savings.
When operating in the current priority mode, by speeding up the response speed of the CC loop, when the current climbs to the constant current set value, the CC loop takes precedence over the CV loop, responds quickly and effectively controls the current to stop climbing, avoiding Overshoot of current for clean, good performance with fast current rise time and minimum overshoot.
Current priority mode characteristics at startup
Case Study: Laser Testing
The traditional power supply has a slower CC loop speed and lower priority. Therefore, when the current reaches the set current, the overshoot of the current cannot be detected and suppressed quickly. When the test below shows conventional power laser, the oscilloscope to capture current and voltage waveforms seen significant overshoot.
Voltage priority characteristics at startup
The IT6100B series can set the CC control loop to the High priority level through the menu, so that the power supply can quickly enter the constant current state, thereby suppressing the current overshoot at the startup instant and protecting the laser. The following figure shows the current waveform captured by the oscilloscope when the IT6100B series power supply turns on CC/CV priority (CC is set to high priority), and there is no overshoot.
Current priority characteristics at 5A startup
Current priority characteristics at 2.5A startup
Current priority characteristics at 250mA startup
From the above test results, it can be seen that in the voltage priority mode, the output waveform quality of the guaranteed voltage and the current may overshoot; and in the current priority mode, the IT6100B is excellent regardless of whether the starting current is milliamperes or amperes. Manage overshoot to ensure the output waveform quality of the current.
ITECH IT6100B series (86 ~ 1200W) is a high-speed and high-precision programmable DC power supply with ultra-high voltage rising edge, full load rise up to 500us, resolution up to 0.1mV / 0.01mA, latest The designed output waveform priority mode allows the voltage or current rise waveform to be high speed without overshoot, and will provide an upgrade experience for engineers in high-precision test areas such as aerospace power modules. Built-in standard USB/RS232/GPIB communication interface, the panel supports List programming, which brings great convenience to the use, and can provide multi-purpose solutions according to the needs of customer design and testing.
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WUJIANG JINLONG ELECTRIC APPLIANCE CO., LTD , https://www.jinlongmotor.com