Energy Harvesting

Convert a small amount of local energy into electric power and use it

ICs for energy harvesting with low input power boosting technology and ultra-low current consumption

Products

In systems using IoT, the IoT terminals can monitor special environments such as high locations and dark places instead of people.

In IoT under special environments, it is important to reduce the size and weight of IoT terminals to improve installability and to realize battery-less operation to eliminate the need for replacing IoT terminals.

In order to achieve battery-less operation, energy harvesting, which uses renewable energy such as light and heat to generate electricity, has a potential in addition to reduction of power consumption of equipment to the ultra-low level.

However, in order to collect the power required to operate an IoT terminal, multiple power generation cell are to be connected serially in a large area, making it difficult to achieve compactness, light weight, and battery-less operation.

Asahi Kasei Microdevices (AKM) offers DC/DC converter ICs for energy harvesting that can operate IoT terminals even when the power that can be extracted is as small as several uW to several tens of uW with self-starting from low-input voltage and ultra-low current consumption circuit technology. It contributes to the achievement of IoT terminals that are compact and light weight as well as battery-less features.

In addition, this device contributes to the effective use of weak power generation cell that could not have been used for power generation so far, taking advantage of the feature that power generation can be started even with a small amount of power generated.

What makes AKM different ?

Since energies generated from renewable sources such as light, vibration, heat, and radio waves are too weak to be used as a power source, many weakly energy harvester cell need to be connected serially over a large area.

Asahi Kasei Microdevices (AKMs) responded to this issue with the ultra-low-power operable circuitry technology.

Here, we introduce the reasons why our energy harvesting ICs are popular amongst customers.

What makes AKM different ?

Applications

Variable natural energies are available including light (1-cell solar), radio waves (rectenna), current (current transformer), bio (Microbial fuel cell (MFCs)), heat (thermoelectric power generation cell), and vibration (vibration power generation cell).

Applications

Lineup

Ultra-Low Power Step-up DC-DC Converter

AP4470

This power supply IC is ideal for utilizing minute and low voltage renewable energies as a power source.
Usable energy sources include light (1-cell solar), radio waves (rectenna), and bio (MFC).
Since the self-consumption current is small, the generated minute energy can be used efficiently.
It is operable from an input power of 1uW, so it can be used even with single-cell solar or photodiodes with a few centimeter-square with low output power.

- Ultra-low power activation

Can be started from input voltage of 0.2V and input power of 1uW.

- Ultra-low self-current consumption

- Built-in power path control function

- Built-in Ultra-low voltage consumption monitoring function

- Package

HWQFN 20pin 3.0mm x 3.0mm x 0.75mm (0.5mm pitch)

Ultra-Low Power Step-up DC-DC Converter

AP4473

This power supply IC is ideal for using a thermal power generation cell as a power supply.
In addition to thermal power generation cell, light (1-cell solar), radio waves (rectenna), and bio (MFC) can be used as energy sources.
Since it is operable from an input voltage of 15mV, it can be used even with temperature difference between a body temperature and a room temperature without using a heat sink.

- Ultra-low power activation

Can be started from input voltage of 15mV and input power of 10uW.

- Ultra-low self-current consumption

- Built-in power path control function

- Built-in ultra-low voltage consumption monitoring function

- Package

HWQFN 20pin 3.0mm x 3.0mm x 0.75mm (0.5mm pitch)

Please use the following graph as the guideline for a product suitable for the output voltage and output current of the power generation cell.

Graph as the guideline

Design Support

AKM offers an evaluation kit that enables simple construction of a 3.3V power supply system simply by connecting power generation cell and input terminals.

Evaluation kit
Evaluation kit graph

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