A DC regulated power supply converts mains AC into a stable, adjustable DC output. It is essential for battery testing, burn-in aging, R&D labs, and industrial integration. For B2B buyers, choosing the right model is more than matching a voltage—it depends on ripple, accuracy, control type, and mounting.
What Is a DC Regulated Power Supply?
It takes AC input (100–240V) and delivers clean, constant DC. “Regulated” means the output stays stable even when the input voltage or load changes. Every model is defined by four specs:
| Parameter | Meaning |
|---|---|
| Voltage (V) | Adjustable output, e.g. 0–30V, 0–60V, up to 0–800V |
| Current (A) | Maximum output current |
| Power (W) | Voltage × Current |
| Ripple (mVpp) | Unwanted noise; lower is better |
How It Works
Inside, AC is rectified to pulsing DC, filtered by capacitors, then regulated by a feedback loop that keeps the output constant. Nearly all adjustable units run in two modes:
- CV (Constant Voltage) — Holds a set voltage; current follows the load.
- CC (Constant Current) — Holds a set current; voltage follows the load.
The supply switches between them automatically—critical for battery charging and overcurrent protection.
Linear vs Switching: Which Do You Need?
| Feature | Linear | Switching |
|---|---|---|
| Ripple & Noise | Very low | Higher |
| Accuracy | Excellent | Good |
| Efficiency | Lower | High (85–95%) |
| Size/Weight | Heavy, bulky | Compact, light |
| Power Range | Lower (up to a few hundred W) | Wide (30W–6000W+) |
| Best For | Labs, audio, sensitive circuits | Production, battery testing, industrial |
Choose linear for sensitive analog or audio work. Choose switching for high power, efficiency, and compact size.
Types by Control
- Potentiometer knob — Lowest cost, fixed adjustments.
- Encoder knob + digital display — Precise numeric readout (3- to 6-digit).
- Programmable — Set via USB/RS232/LAN or software; for automated testing and production lines.
- Multi-channel — 2 to 10 channels in one chassis for parallel testing.
- Rack-mounted — 1U, 2U, or 3U for test racks and cabinets.
How to Choose (B2B Checklist)
- Voltage & current — Add 10–20% headroom above your worst case.
- Power — Don’t run at 100% rated power; it shortens lifespan.
- Ripple — Sensitive loads need linear or low-ripple models.
- Protection — Ensure OVP, OCP, and OTP.
- Programmability — Needed for automated or logged testing.
- Mounting — Desktop for bench; rack for production integration.
- Customization — Ask the manufacturer for wide-range or custom voltage/current if standard models don’t fit.
Common Applications
Battery formation and charging, LED burn-in, aging racks, R&D prototyping, industrial automation, telecom testing, and high-voltage research (up to 6000V).
About ETOMMENS
ETOMMENS (Dongguan Jike Electronic Technology Co., Ltd.) supplies DC regulated power supplies from 30W to 6000W, voltages 0–15V to 0–800V, with high-voltage rack models up to 6000V. Our range includes desktop switching and linear supplies, high-precision programmable cabinet series (SP/SPL/SPD/SPV), 6000W high-power units, multi-channel systems, and rack-mounted models. We support OEM/ODM and wide-range constant-power customization.
Tell us your voltage, current, and application—our engineers will recommend the right model or build a custom solution. Contact us.
FAQ
Linear or switching—what’s the difference? Linear has lower ripple and higher accuracy but is heavier and less efficient. Switching is smaller, more efficient, and covers higher power with slightly more ripple.
What voltage/current do I need? Sum your load’s maximum needs and add 10–20% headroom. Power = voltage × current.
What does programmable mean? The supply is set and read remotely via USB, RS232, LAN, or software, enabling automated and repeatable testing.
Can you customize the range? Yes—most manufacturers offer wide-range and custom voltage/current configurations.