Constant Current Power Supply - 12.6V 10A

Components & Accessories Power
1

Hi, I purchased this product: PRT-18722

However, after testing it by connecting the power supply and setting the input voltage to 22 V with maximum currents at 25 A, I utilized an electronic load to draw currents from this module. The results indicate that below 10 A, it functions well; however, after setting it to a higher current (11 A), this module will cut-off circuit.

Is this a normal operation? I had expected it to consistently clamp or hold the current at 10 A (reducing the voltage instead; CC-charger) even if the load attempts to draw more current than this.

2

Welcome @benkingjo
That appears to be a very specialized supply, intended to recharge a 3S Li-on Pack, with a capacity over 10Ah (for a 1C rate).

Since it expects the output/load to be a 3S li-on, the current will be reduced as the load approaches 12.6V. If you try to use this as a standard 12V power supply for electronics, it will behave unexpectedly, as that is not the intended purpose.

These are all assumptions based on the datasheet.

3

Yep, that’s expected…at over 10A it’s kicking into over-current protection mode. It’s partially CC, but has limited load regulating ability :-/

For your case, you might need to look at one of the following:

  • A laboratory DC power supply with CC/CV modes

  • A DC-DC converter with current limiting (e.g., buck module with CC adjustment)

  • A dedicated CC/CV battery charger with explicit current regulation specifications