☷ Product Description
Our switching power supply adopts pulse width modulation (PWM) and high-frequency switching conversion technology, which achieves efficient energy conversion and precise voltage regulation output through precise circuit control. The product series covers various types such as compact rail power supplies, open board power supplies, and sealed waterproof power supplies, meeting the needs of different installation environments. ▶ Core topology：By adopting mature and reliable advanced topology structures such as Flyback, Forward, Half Bridge/Full Bridge, and LLC resonance, the efficiency and cost of different power ranges are optimized. ▶ key components：Using internationally renowned brands such as Infineon, TI, STM for MOSFETs and controllers, coupled with high-performance high-frequency transformers and low ESR solid-state capacitors, to ensure product reliability and longevity from the source. ▶ Precision control and protection：Built in precision feedback loop, achieving pure output with low ripple noise and high load/linear adjustment rate. It has comprehensive protection functions, including overload (OLP), overvoltage (OVP), short circuit (SCP), and over temperature (OTP) protection, to ensure the safety of power supply and terminal equipment. ▶ Design and Compliance：The product design complies with international safety and electromagnetic compatibility (EMC) standards such as UL, CE, CB, RoHS, and some models meet stringent requirements such as Class I (Div 2) or medical (BF type).
☷ Product Advantages
The core function of AC/AC communication adapter 1. Voltage conversion: This is the most direct function. It reduces the high voltage of the mains power (such as 220V AC in China and 110V AC in the United States) to the safe low voltage required by the equipment (such as 16.5V, 9V, 18V, etc. as you mentioned). 2. Electrical isolation: This is the most critical and important safety function of AC/AC adapters. It uses an internal transformer and the principle of electromagnetic induction to completely isolate the input side (primary coil) and output side (secondary coil) electrically. There is no potential difference between the output voltage and the ground. Even if you accidentally touch one end of the output line, it will not form a circuit with the ground, thus avoiding the risk of electric shock and greatly improving the safety of device use. Isolation can effectively block surges, peak voltages, and noise interference in the municipal power grid, providing a “clean” power source for precision electronic equipment in the backend and extending equipment lifespan. 3. Design tradition and cost: For some mature devices, their internal circuit boards already integrate rectification, filtering, and DC-DC voltage stabilization modules. Continuing to use simple and reliable AC/AC adapters can reduce the cost of the adapter itself. ▶ Heat dissipation considerations: Placing the rectification and voltage stabilization circuits that generate heat on the motherboard inside the device can utilize the larger space and casing of the device itself to dissipate heat, rather than concentrating all the heat in a small adapter. ▶ Anti interference capability: Simple power frequency transformers are not sensitive to external electromagnetic interference and may be more reliable in certain noise sensitive applications. ▶ Safety: For a type of electrical appliance (with a metal casing that needs to be grounded), separating the “coarse adjustment” (voltage isolation) and “fine adjustment” (rectification and stabilization) of the power supply is a classic and safe design solution. The fundamental difference from AC/DC adapters To better understand the function of AC/AC adapters, comparing them with AC/DC is a very effective method:
| Characteristics | AC/AC Adapter | AC/DC Adapter |
| Output current type | Alternating current | Direct current |
| Core component | Power frequency transformer | Transformer+rectifier bridge+filtering capacitor+(voltage regulator circuit) |
| Essence | Isolation step-down transformer | Switching power supply or linear power supply |
| Output voltage characteristics | Usually it is non regulated, and the voltage may fluctuate slightly depending on the load | Usually it is regulated, and the output voltage remains stable at the nominal value |
| Weight and volume | Heavy and large (due to iron core and copper wire transformer) | Light and small (especially switch mode power supply) |
| Efficiency | Relatively low | Relatively high |
| Application Logic | I am only responsible for providing safe low-voltage AC power, and you can do the rectification and voltage stabilization yourself | I will directly provide you with the stable DC power required for the device, and you can use it immediately |
Some models have passed UL certification and comply with UL1310 safety specifications (UL file number E310452)
|
Model |
Input |
Output |
|||
|
V ac |
Hz |
A or W |
V ac |
VA |
|
| ETL-AA025x-W165152 |
120 |
60 |
0.3A |
16.5 |
25 |
| ETL-AA025x-W090277 |
120 |
60 |
0.3A |
9.0 |
25 |
| ETL-AA020y-W090223 |
120 |
60 |
0.3A |
9.0 |
20 |
| ETL-AA040x-W165240 | 120 | 60 | 50W |
16.5 |
40 |
| ETL-AA050X-W165300 | 120 | 60 | 0.50A |
16.5 |
50 |
| ETL-AA0502-W180278 | 120 | 60 | 0.59A |
18 |
50 |
Note: x=1,2,3 or 4； y=1, 2, 3, 4, A, B, C or D
☷ Application Scenarios
Our switching power supply is the “power heart” of the following fields, providing stable and clean DC power supply: ▶ Industrial Automation：PLC、 Control power supply for servo drives, stepper motors, industrial robots, sensors, I/O modules, and touch screen HMI. ▶ Communication and Network Infrastructure：5G base stations, routers, switches, servers, fiber optic transceivers, and backup power systems for data centers. ▶ Intelligent Manufacturing and Mechanical Equipment：CNC machine tools, laser engraving machines, 3D printers, packaging machinery, textile machinery, production line equipment. ▶ Intelligent Buildings and Security：Access control system, building intercom, video surveillance (CCTV), alarm system, LED lighting driver. ▶ Medical and laboratory equipment：Medical diagnostic equipment, bed monitoring devices, laboratory analytical instruments (requiring medical certification models). ▶ Transportation and New Energy：Rail transit electronic system, electric vehicle charging facilities, photovoltaic monitoring system, unmanned aerial vehicle ground station.
☷ Product Display
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