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Product Overview
The D‑60 series is a 60W‑class, dual‑output open‑frame switching power supply. It accepts 85~264VAC wide input voltage (selectable via a switch) and delivers two independent DC outputs simultaneously. Each output has its own overload, short‑circuit, and over‑voltage protection, and the two channels do not interfere with each other.
From the very beginning, the D‑60 series was positioned as a cost‑effective industrial‑grade dual power supply – no extra frills, but every key parameter (ripple, efficiency, hold‑up time, temperature coefficient) is measured and verified. Every unit is 100% burn‑in tested at full load before leaving the factory to prevent early failures.
Key Features
True independent dual outputs
Unlike some power supplies that derive a second output from a linear regulator, the D‑60 uses two separate switching converter circuits. This gives tight control over load regulation and cross regulation. For example, the CH2 (12V) of D‑60A stays within ±6% across the entire load range.Adjustable CH1 voltage
The first output voltage has an adjustment range of -5% ~ +10%. If your equipment needs 5.2V or 4.75V, you can fine‑tune it with a screwdriver instead of replacing the power supply.Convection cooling, no fan
The whole series relies on free air convection for cooling, with ventilation slots on the top and bottom of the case. It can deliver full load at -10℃ to +60℃ ambient temperature. Fan‑less means zero noise and no dust accumulation, making it ideal for clean rooms or quiet labs.EMC design and safety pre‑compliance
Although the D‑60 is a component that must be installed into final equipment before full EMC certification, its design strictly follows EN55022 (CISPR22) Class B limits for conducted and radiated emissions. Common‑mode chokes and X‑capacitors are already integrated on the input side. With proper wiring, customers can pass final EMC testing with relative ease.
Advantages over competing products
Worldwide input with voltage selector
The voltage selector switch on the side allows stable operation in both 110V and 220V regions without custom versions. For export equipment manufacturers, this means fewer SKUs to manage.Auto‑recovery after short circuit
Once the overload or short‑circuit fault is removed, the power supply automatically restarts – no need to cycle power. This is very useful in unattended equipment.Low ripple for analog circuits
The D‑60C model delivers ±15V with ripple of 100mVp-p and 120mVp-p respectively – fairly good for a switching power supply, enough to drive operational amplifiers and sensor signal conditioning circuits. If you need even lower noise, you can add an external LC filter on the output.Two‑year warranty, better than industry average
Most small industrial power supplies come with a 1‑year warranty. Luyu offers 2 years, showing confidence in their capacitor selection (usually the life limiter) and overall thermal design.
Typical applications
CNC machine auxiliary power – 5V for the control board MCU, 24V for solenoids or relays (D‑60B)
Dual‑output audio amplifier – +15V / -15V for symmetrical op‑amp supply (D‑60C)
Security surveillance system – 5V for the camera digital core, 12V for the PTZ motor (D‑60A)
Small PLC and industrial controller – Many domestic PLCs require 5V logic and 24V I/O power – a single D‑60B covers both
Lab test fixture – When a test bench needs ±12V or ±15V temporarily, the D‑60C is lighter and cheaper than a bench linear supply
Frequently Asked Questions (FAQ)
Q: Is the ±6% voltage tolerance on CH2 (12V) of the D‑60A too high?
A: ±6% is the worst‑case specification across full load (0.3~3A), full input voltage (85~264VAC), and full temperature range. At 25℃, rated load (3A), and 230VAC input, the actual tolerance is usually within ±2%. If you need tighter regulation on 12V, you can increase the load on CH1 (this improves cross regulation) or add an external 12V linear regulator.
Q: Are the two outputs sharing a common ground?
A: Yes. Both outputs share the same GND terminal on the D‑60 series. If you need fully isolated outputs, please consider Luyu’s D‑120 dual‑isolated series.
Q: Does the D‑60 switch automatically between 85~132VAC and 170~264VAC?
A: No. It must be manually selected via the side switch. The factory default is the 230V position. If you use it in a 115V region without moving the switch, the power supply will still work, but maximum output power will drop by about 20%. Always check the switch position before applying power.
Q: Can the D‑60 run at 60℃ for long periods?
A: Yes, but with at least 20% derating. Specifically:
Below 50℃: full load allowed.
50℃ to 60℃: derate 2.5% per degree Celsius (so at 60℃, load should not exceed 75% of rated power).
This is due to the lifetime of the internal electrolytic capacitors. Also ensure at least 2cm of free air space around the power supply.
Q: Can I use the D‑60 to drive LED strips?
A: Yes, but note: the 24V output ripple of the D‑60B is 120mVp-p. For most LED strips this is fine (the human eye cannot detect it). However, if you are driving high‑resolution COB strips that are sensitive to flicker, we recommend adding a 470µF electrolytic capacitor in parallel with the output to further reduce ripple.
Q: Does the D‑60 have CE / UL certification?
A: Luyu designs the D‑60 with reference to UL60950 and EN60950 safety standards, and performs pre‑compliance EMC tests according to EN55022 etc. However, as a switching power supply is considered a component, final certification must be obtained together with the finished equipment. Luyu can provide test reports and a Declaration of Conformity (DoC) for your integration reference.
Note: All technical parameters are based on the Luyu D‑60 datasheet (rev. V2.3), measured at 230VAC input, rated load, 25℃ ambient, after 15 minutes warm‑up. Always refer to the official datasheet for actual use.
