SWM12-18-NV-P5

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AC DC Desktop, Wall Adapters provide electrical energy for device operation; the SWM12-18-NV-P5 is among one such adapter. This article delves into the device’s application field and working principle.

Application Field

The SWM12-18-NV-P5 is a desktop type power supply designed for commercial and household electronic equipment but can be used for any type of AC/DC adapter purposes. It supplies a constant 12V output voltage at 0.6A (7.2W), and is equipped with an output voltage adjustment range of 10V-18V to meet different applications. In addition, its wide input voltage range (85-264VAC) makes it suitable for most countries around the globe, and its ultra-wide, temperature Operating Range (from -20°C ~ +50°C ) could accommodate those living in different climates. The device is compliant with UL, EMC, CB, FCC, RoHS and SGS. The product features an efficiency level of over 70%, is of a high quality and is highly reliable.

Working Principle

The SWM12-18-NV-P5 follows the traditional design of even mode flyback topology. The primary side of the device consists of rectifier and filter, EMI filter, power switch and primary transistors/POR and the transformer. The secondary side of the device consists of opto-coupler, Rectifier, filter and error amplifier.

The rectifier and filter of the primary side contain a bridge rectifier and capacitor filter, working together to rectify the incoming AC supply and filter them to DC voltage. The EMI filter is installed to reduce electromagnetic interference, avoiding interference from the device with connected circuitry. The power switch is responsible for controlling the power delivery, turning the AC input into DC output. An opto-coupler (also called a photocoupler) can be connected to the transformer to regulate and feedback the power. It implements the pulse-width modulated flyback topology to ensure the SWM12-18-NV-P5’s stable output voltage. The rectifier filter, together with filter capacitor and error amplifier, perform the post-conversion of the AC to the desired DC voltage and also for maintaining the desired output voltage and preventing over-voltage.

Overall, the SWM12-18-NV-P5 contains many features that make it a suitable AC/DC desktop Wall Adapter. Its wide input voltage range makes it suitable for most countries, and the high efficiency level guarantees reliable and quality conversion from AC to DC. With its multiple protection features, the device is also guaranteed to be safe and reliable.

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