The DP30V5A module costs ~ $ 30, which is a considerable amount, because at this price we can buy a complete power supply with similar parameters, adapted to mains supply and with analog regulation. Digital parameter adjustment and indication of the output power are an added value in the DP30V5A. The module can be used to modernize or expand the functionality of the existing linear power supply with analog regulation. Another application may be the use of the module as a mobile power supply, using a battery or a "recovered" switching power supply as a power supply, e.g. being a power supply for a laptop, printer, etc.
The power supply has a surprisingly small heat sink. The high efficiency of the impulse converter allows for high power operation without excessive heating of the switching elements.
The resistor used to measure the output current is located close to the input and output terminals:
The following elements are mounted on the heat sink:
J652 - MOSFET P 60V 28A 38mom,
RB085T - 60V 10A double Schottky diode.
The module for its own needs consumes about 17mA with a 30V power supply.
The shape of the voltage at the output with the parameters Uwy = 10V, Uwe = 30V and currents successively 0A, 0.5A, 1A, 2A, 3A, 4A, 5A:
This is how the efficiency of the power supply looks like with an input voltage of 30V, output voltages of 5V and 10V and an output current of 0.5A - 5A:
And efficiency at a constant output current of 1A, output voltage adjustable in the range of 1-28V, supply voltage 30V:
What do you think about this panel power supply - where can it be used?
Cool? Ranking DIY
From my observations: the encoder has a lot of resistance, maybe it is a matter of my copy. The system does not allow overloading the power source it is powered by. I had to use a 24V 400W transformer (of course with a bridge and a capacitor) so that there was no problem. With a weaker transformer, the system disconnected the output at 19V 2A. Now I have a full 5A.
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