Connecting el ect ri city and el ect ro ni cs eq ui pm ent C O S E L

01. Evolving into Compact Power

Tiny parts—CRAM! CRAM! CRAM!

Our SMPS consists of numerous electronic components, and high-power models can contain over 1,000 parts.
Electronic components have become smaller, with the smallest components measuring just 0.4 x 0.2 x 0.2 mm, making them difficult to see with the naked eye.
SMPSs have become increasingly smaller by arranging components at high density and optimizing circuit patterns and layouts.
Compared to products developed ten years ago, we have achieved the same performance in half the volume.

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From flat to towering

The miniaturization of SMPS is also enabled by multilayer technology.
Multi-layering involves stacking multiple component-bearing boards to form a three-dimensional structure.—essentially transforming a flat design into something like a high-rise building.
From two-dimensional to three-dimensional: advanced multilayer circuit formation technology is driving the compactness of power supplies.

02. An Ever-Growing Need for SMPS

Demand for Multiple Different Voltages

Nowadays, most electronic devices contain numerous integrated circuits (ICs).
ICs are evolving every day, and each IC requires an optimal supply voltage that varies. Therefore, it is necessary to supply the optimal voltage for each functional block and to isolate power supplies to reduce noise and improve efficiency, which requires multiple power sources.

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Each device has its own SMPS

As a result, the power supply configuration has shifted from directly supplying power through an AC-DC converter, as shown in the left diagram, to providing the optimal voltage and current for each device, as shown in the right diagram.
The role of SMPS is becoming increasingly important in improving the performance of electronic products.

03. Intelligent SMPS

Putting intelligence inside the SMPS

COSEL is currently developing an IPS (Intelligent Power System).
Incorporating an MCU* into the SMPS will enable data collection and analysis, system control, and communication capabilities for alarms and notifications.
At Cosel, we are developing SMPS with advanced functions, including equipment status and load monitoring, failure prediction and notifications through self-diagnosis, and remote monitoring and operation.
We are pushing the boundaries of SMPS technology.

* An MCU (Micro Controller Unit) is a microprocessor that integrates a computer system into a single chip. It is commonly used for controlling electronic devices. An MCU includes memory such as ROM and RAM, as well as numerous functions like I/O interfaces.

04. One power plant worth of energy savings — made possible

Save Energy, standby and operating power

In today’s environment of creating sustainable product development, Cosel is committed to achieving energy savings from two approaches.

First, we focus on reducing standby power consumption, which accounts for approximately 5%* of a household’s total electricity usage. How can this be reduced?
To address this, COSEL integrates an IC-based power-off function into its SMPS. We are developing technology to reduce power consumption to nearly zero without turning off the main power switch.

The second approach is to reduce power during normal operation—when appliances are switched on and actively in use. Conversion losses are inevitable during AC-DC and DC-DC conversion, resulting in heat generation.
Increasing conversion efficiency reduces heat generation and also minimizes the energy required for cooling.
COSEL leverages its expertise in design and materials to enhance conversion efficiency.

*From the Ministry of Economy, Trade and Industry's energy-saving performance catalogue

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Supports energy generation

New energy sources, such as solar power and fuel cells, are becoming increasingly common in ordinary households.
To make the electricity generated by these sources usable at home, an inverter is essential for converting DC into AC.
SMPS also play an important role in power conversion for energy generation systems.