MORNSUN Power Supply Solutions for IoT and New Energy Applications


Internet of Things (IoT) technologies are growing increasingly popular as they have become an essential aspect of our everyday lives. They have penetrated almost every industry while making the world a smarter, greener, and more convenient place. New connectivity technologies are being introduced year after year to ease the life of homeowners and business owners worldwide.

However, while connectivity is an essential aspect of IoT, design engineers are faced with the challenge of maintaining long-term online to offline communication even when the smart devices are in stand-by mode. An efficient AC/DC power supply ensures continuous communication between devices and limits its stand-by power consumption in smart homes and industrial IoT environments.

We are heading toward an increasingly smarter but also greener future. At least, environmental damage and climate change are making new energy sources a more urgent priority for businesses and governments worldwide. The money investments behind renewable-energy power plants tend to be quite significant. Therefore, it is even more essential to invest in power supplies that can properly balance electricity supply and demand on the power grid, despite the challenges posed by the intermittent nature of many renewable energy sources.

Power generation for IoT infrastructures and renewable energy systems can result in different challenges based on their environment and specific applications. In both scenarios, failing to select high-efficient and high-performing power supplies can cripple the long-term performance and lifespan of the system or device. For this reason, we will share more details on how we at MORNSUN can help you with your power design of IoT devices and renewable energy systems.

What is IoT?

The Internet of Things (IoT) describes the network of physical objects that are embedded with sensors, software, and other technologies to ensure the connection and data exchange with other devices and systems over the Internet. Some examples of IoT technology deployment include an office room adjusting ambient light levels to human presence or commands, health monitoring machines, or home regulation technology that helps regulate our lives automatically for more efficient resource usage and comfortable living.


IoT technologies often heavily rely on the data collected from IoT devices like sensors and actuators. All of these always-on, active 24/7 sensors will consume power. A reliable and high-efficiency power supply helps the device to balance stable performance and decrease the environmental impact.


In short, powering IoT devices means a low-power consumption AC/DC power supply is required. As typical IoT devices spend a lot of time in stand-by mode, the AC/DC converter should combine high efficiency at both low and full load with the ability to handle load currents that are fast, transient and dynamic. In other words, you may want to look for AC/DC power supplies that are physically high-efficiency, reliable, and above all, affordable.

For example, smart thermostats are among the most common IoT-enabled devices in smart homes and other interconnected environments. These devices need to combine high-density and very low input current with a compact size and low costs. In this case, it is even more important to find a power supply truly suitable for smart thermostat applications. Click here to read more about MORNSUN’s one-stop solution for this application, a 3W AC/DC converter series called LS03-13B12R3.

What Do We Mean With “New Energy”?

On the other hand, “new energy” refers to energy obtained from renewable resources, hence why it is also called “renewable energy”. This type of energy is crucial in many different areas such as electric generation, water and air cooling or heating, transportation, off-grid electric energy services, and more. Today, new energy sources are also powering mobility options like electric vehicles, trains, and even airplanes.

The demand for renewable energy is rapidly rising and will continue to grow more into the future as the need to fight global warming and climate change takes center stage. New energy markets and technologies are developing fast. These forms of energy are becoming cheaper, giving rise to a growing demand for devices that rely on this efficient, economical power solution.

To this end, we at MORNSUN have developed power modules that support an ultra-wide Input voltage range for a large variety of IoT devices.

These power supplies are also compatible with new energy systems like solar control panels, automobile control and drive systems, and more. Some devices like the MORNSUN LS-R3 series and the MORNSUN LD-R2 series are designed specifically to meet these needs.

The MORNSUN Power Supply LD-R2 and LS-R3 Series

LD-R2 Series

Due to the development of IoT and the smart home trend, the requirement of household appliances for safety and dimensions is important. Smart home appliances include various power supplies and electronic components that enable graphics, wireless communications, software interfaces, and other functions. All the power supplies and electronic components have an impact on the overall safety of the product.


The MORNSUN LD-R2 series are ultra-compact and cost-effective AC/DC converters for applications with space limitations. The 3W and 5W modules have dimensions as small as 1×1 inch. In addition, the capacitors design, EMI class B without external components requirement, and the low-no-load power consumption make the product perfect for home appliances.

Moreover, the LD-R2 complies with OVC III requirement and downward compatible with OVC II, I application and environment. The 2-Y-capacitor design, and EMI class B without external components requirement make them perfect for audio and video communication equipment and household appliance.

Key Features

  • Operating temperature range: -40℃ to +85℃
  • High efficiency up to 87%
  • No-load consumption as low as 0.1 W
  • Wide input voltage range: 85-305VAC/100-430VDC
  • 5000m altitude application
  • EMI meets CISPR32/EN55032 CLASS B
  • Meet IEC/EN/UL62368/EN60335/EN61558 standards

LS-R3 Series

Miniaturization is becoming the in-thing for end-use devices as they continue to grow smaller and lighter, requiring a higher level of integration technology to boost their ease of use. Engineers have been puzzled for years on how to find a balance between size, cost, performance, design cycles, reliability, ease of use, and personalization in designing and producing electrical products.


The MORNSUN AC/DC converter LS-R3 series is a miniature and highly efficient module that addresses all conflicting requirements at once. This technology adopts a flexible peripheral circuit, LS-R3 series, which is an innovative, cost-effective solution that is being used in several industries and applications.

With circuits integrated into the MORNSUN IC, the LS-R3 modules help to make complex power design with peripheral circuits simple. This results in an increase in performance while saving costs from design and maintenance.

Key Features

  • Ultra-compact size: 26.4 x 14.73 x 11mm (5W)
  • Ultra-wide input: 85-305VAC
  • Operating temperature range: -40℃ to +85℃
  • No-load power consumption when low up to 0.1W
  • High power density, high reliability
  • IEC/EN/UL62368 approval

Competitive Advantages Compared To Other Discrete Designs(3W)

  • Smaller dimensions of 52 x 26 x 15mm versus the larger size of discrete designs, which is 51.5 x 31.5 x 15mm.
  • Simplified and easy-to-use design, while discrete designs feature inefficient material control or over-design.
  • Less cost from design to maintenance compared to the complex design, which often leads to higher costs.
  • Flexible peripheral design for a wide range of applications against the limited use of discrete design which meets common functions only.
  • 85-305VAC, 80%, 0.1W, 80mV vs 85-265VAC, 71%, 0.25W, 100mV.


The small size, high efficiency and low no-load input power consumption of the MORNSUN LS-R3 Series make these AC/DC converters ideal for IoT applications. In particular, by maintaining control circuitry powered on standby, they help you reduce standby and no-load losses that are common in IoT systems and devices.

The same goes for renewable energy applications, where environment variables play a key role in the energy generation process. In particular, engineers are tasked with designing power system circuits that meet new energy efficiency standards and decrease the standby power consumption of electronic devices.

As the “heart” of the electronic system, power supplies need to be more efficient. This is what the MORNSUN LS-R3 and MORNSUN LD-R2 are made for.

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