Triple Output DC Power Supply Glossary of Terms
A quick reference guide to the technical specifications and terminology used in the DC power supply industry.
Programmable DC Power Supply
A power supply that can be controlled remotely via digital interfaces (like USB, RS232, or LAN) using commands (such as SCPI). This allows for automated testing, voltage stepping, and data logging without manual knob adjustments.
Multiple Output DC Power Supply
A power supply unit that provides two or more independent DC outputs. A 3 output dc power supply (triple output) is the most common configuration for bench work, typically offering two variable channels and one fixed/logic channel.
Ripple and Noise (PARD)
Periodic and Random Deviation (PARD). The residual AC voltage superimposed on the DC output. Measured in mVrms (root mean square) or mVp-p (peak-to-peak). Lower is better, especially for analog and RF circuits. Linear supplies typically offer < 1mVrms.
Load Regulation
The ability of the power supply to maintain a constant output voltage (or current) despite changes in the load resistance. Expressed as a percentage (e.g., < 0.01% + 2mV). A lower percentage indicates a more stable supply.
Line Regulation
The ability of the power supply to maintain a constant output voltage despite fluctuations in the input AC line voltage (e.g., from the wall outlet).
Transient Response Time
The time it takes for the output voltage to recover and settle within a specified tolerance band (e.g., 15mV) following a sudden, large change in load current (e.g., a 50% to 100% load step). Critical for testing digital circuits and IoT devices that wake up from sleep modes.
Galvanic Isolation
The principle of isolating functional sections of electrical systems to prevent current flow; no direct conduction path is permitted. In power supplies, this means the output channels are floating and not tied to Earth Ground, preventing ground loops.
SCPI (Standard Commands for Programmable Instruments)
An ASCII-based standard for syntax and commands to control programmable test and measurement devices. Used over interfaces like USB, LAN (LXI), and GPIB.
Ready to Apply This Knowledge?
Review the specifications of our premium linear power supplies and see the difference.
Check Online Stock & Pricing