Power Electronics / Power Management


Programmable bench-top power supply

23 January 2013 Power Electronics / Power Management

The unit is aesthetically appealing with a slim profile and it runs completely silently, with the automatic fan only coming on for short times when high currents are drawn. Voltage and current are adjustable from 0–32 V, 0–5 A.

The interface is completely digital, which provides some important advantages over the normal analog adjustment. For instance, one can set the voltage and current to new values on the display and only at the final press of a button will the actual output be adjusted. This means if the user changes the voltage from 5 V to 12 V it can be done in a very clean and instant switchover.

Another advantage of the digital interface is that five preset configurations are available that can be restored at the touch of a button. It also provides the ability to change the voltage/current increment values when adjusting them with the knob, locking the values so they cannot be changed accidentally.

The PPS2116A includes a USB port and comes with software that enables the user to monitor the voltage and current, to control it from a PC, and to log the voltage and current.

The USB interface provides for handy applications, for instance in the accompanying graph the PSU was programmed to step the output voltage from 0 V to 30 V in 5 V increments and log the current that was drawn by a 40 Ω resistor. The logged voltage and current values can be exported to a CSV file for inclusion in reports.

The PPS2116A is a single-channel PSU, but its small size and low price means that two units can be placed next to each other to form a dual-channel power supply.

The unit comes with software and crocodile and power cables and K Measure assures that it keeps stock, delivery is free and orders are shipped within 24 hours.



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