To set up an energy harvesting system, you need a harvester, a storage element, and an AEM. The AEM is the central component of the system. It extracts the maximum power provided by the harvester and stores it in the storage element, so that this energy can be used later — and in some cases, it can even be used to directly power the application.
AEM30300
High-efficiency AC MPPT buck-boost battery charger
e-peas’ AEM30300 is a high-efficiency energy harvesting battery charger that maximizes power extraction from intermittent sources, DC sources, and AC sources with adapted rectifiers thanks to a buck-boost converter. It supports high-efficiency conversion and allows for MPPT ratio and timing configuration ensuring adaptability to various harvesters.
With ultra-low power cold start, the AEM30300 can efficiently operate from minimal available energy. Its configurable storage element protection levels ensure compatibility with various storage element types.
Additionally, its balancing circuit allows for safely charging a dual-cell supercapacitor, while its shipping mode prevents energy drain during transport making it an ideal solution for long-term deployments.
Product Information
Products
Power converter
- Harvester: Reconfigurable Boost / Buck-Boost / Buck Converter
Harvester input
- Maximum Power Point Tracking (MPPT)
- 100 mV to 4.5 V
- Open Circuit Voltage: Max. 5.0 V
- Cold Start: Min. 3 µW / 275 mV
Storage element
- 0 V to 4.65 V
- Configurable Protection Levels
- Shipping Mode
- Dual-Cell Supercapacitor Balancing
- Battery Charger: Zero Idle Current when No Energy Available on Harvester
Extra features
- Source Constant Impedance Matching (ZMPPT)
- Source to Storage Element Feed-Through Capability
Package
- QFN28 4x4mm
Features and benefits
Highly Versatile Buck-Boost Converter
- Harvest from 100 mV after cold start
- Optimized for a wide range of applications
Adaptative and Smart Energy Management
- Automatically switches between boost, buck-boost and buck operations based on the input and output voltages
Maximum Power Point Tracking (MPPT)
- Configurable MPPT ratio and timings for compatibility with intermittent sources, DC sources, RF and AC sources with adapted rectifiers
- Source constant impedance matching (ZMPPT)
Ultra-Low Power Cold Start
- Cold start from 3 µW / 275 mV
Configurable Storage Element Protection Levels
- Configurable overdischarge, charge ready and overcharge protections to support a wide range of rechargeable storage element types
Dual-Cell Supercapacitor Balancing
- Balancing circuit to safely charge a dual-cell supercapacitor
Ultra-Low Power Idle Mode
- Stored energy is preserved when no source available
Shipping Mode
- Storage element charge and discharge disabling during shipment
Source to Storage Element Feed-Through
- Option to create a direct feed-through current path from the source to the storage element
Low BOM
- Reduced external component requirements
Block Diagram
Evaluation boards
The AEM30300 Evaluation Board (76 mm x 49 mm) offers a complete solution for testing the features and performances of the AEM30300 energy harvesting PMIC in QFN-28 package. It includes the necessary passive components for optimal operation and a set of jumpers for easy configuration.
Designed for flexibility, the board allows full configuration and provides:
- Energy harvester input, with its configuration settings.
- Two Rectifiers, for low and medium frequency AC sources.
- Connection for the storage element, with configurable protection levels, custom mode and balancing feature configuration.
- Mode configuration.
- Status signals pin access.
For detailed setup and advanced features, refer to the AEM30300 datasheet and EVK documentation.
Quick start guide
AEM30300 Evaluation Board Quick Start Guide
User guide
AEM30300 Evaluation Board User Guide
How it works
Basic Functionality
Energy Harvesting Sources
Storage Element Protection
Storage Charger Only
Support
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Our products are suitable for a wide range of applications
Smart Home & Buildings
Smart Locks
Leak detectors
CO2 sensor
Humidity sensors
Security systems
Occupancy sensors
Temperature sensors
Lighting Controllers
Consumer Electronics
Remote controls
Gaming controllers
Keyboard
Mice
Portable speakers
Headphones
E-readers
Smart scales
Webcams
Industrial IoT
Access control
Asset tracking
Metering
Smart factory
Predictive maintenance
Smart HVAC
Remote Control
Webcams
Smart Retail
Electronic shelf labels
Commercial lighting
Advertising anchors
Direction finding
Wearables
Luxury & Smart watches
Smart hospitals
Portable medical devices
Fitness bands
Wellness trackers
They tried it. They signed up for life for their devices.
Our customers share their experiences.
Toshiya Yamamoto
Vice-President Business Development at Nichicon
The long history of partnership between Nichicon and e-peas proves that both companies can mutually enhance their presence in strategic projects with key customers and at global business events, and that both companies can find great synergy.
Nichicon has developed an energy harvesting evaluation board and provided it to customers. e-peas’ excellent low-power PMIC can maximize battery performance.
Read more 
Niklas Forsgren
FAE Director at Epishine
Collaborating with e-peas has been both rewarding and impactful. Their broad range of configurations, and technical expertise have been instrumental in advancing energy harvesting technologies.
By working together, we’re not just addressing market needs but actively shaping its future. I’m excited to deepen this collaboration as we continue to build a strong ecosystem for sustainable innovation.
Read more 
Hao Yin
CEO of TEGnology
TEGnology and e-peas have had several years’ collaborations in the field of Thermal Energy Harvesting, and there is no reason not to believe the collaboration will continue.
Combining TEGnology’s superior thermal energy harvesters with e-peas’ high efficiency PMICS is enriching each other field presence and customer value proposition. We count on each other’s expertise and reputation, when we propose solutions to the market. By standing together, we can close the deals with better offers. This turns out to be an exciting and fruitful way of collaborating.
Read more 
Giampaolo Marino
Senior Vice President of Strategy and Business Development at Energous
“e-peas PMICs are an integral part of a wireless power network, enabling RF harvesting for battery-free IoT devices such as sensors and tags. The combination of Energous' PowerBridge transmitter systems and IoT devices powered by e-peas' technology will revolutionize the way organizations power and interact with their connected technologies.”
Read more Contact us
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Any questions?
WHAT ARE THE DIFFERENT ELEMENTS REQUIRED TO BUILD AN ENERGY HARVESTING SYSTEM?
WHAT ARE THE POWER RANGES IN AN INDOOR AND OUTDOOR ENVIRONMENT?
The power generated depends on the type of harvester, its size, and the environment.
For example, in the case of Photovoltaic energy harvesting, the output power will depend on the size of the photovoltaic cell, the light intensity, and the PV cell technology used.
- Indoor Photovoltaic energy harvesting generates power in the range of hundreds of microwatts. (These values may vary depending on the size of the cell.)
- Outdoor Photovoltaic energy harvesting generates power that can reach tens of milliwatts. (These values may vary depending on the size of the cell.)
Other types of harvesters include thermal, RF, and vibration harvesters.
- Thermal energy harvesting (TEG) relies on temperature differences and typically generate power in the range of a few microwatts to several milliwatts, depending on the thermal gradient and the efficiency of the thermoelectric materials.
- RF (Radio Frequency) harvesting capture energy from ambient radio waves, such as those emitted by Wi-Fi, GSM, or TV signals. The power levels are usually very low, often in the microwatt range, and highly dependent on the distance from the emitter and the frequency band.
- Vibration or piezoelectric harvesters convert mechanical vibrations into electricity. The harvested power can vary from a few microwatts up to several milliwatts, depending on the frequency and amplitude of the vibrations as well as the mechanical structure of the harvester.
Each harvester type has its strengths and limitations, and the choice depends on the available energy in the environment and the application’s power requirements.
CAN I HARVEST ENERGY FROM MY WIFI?
Wi-Fi transmissions are limited by regulations to a maximum of +20 dBm at the transmitter. In most cases, this power level is insufficient for effective energy harvesting.
Significant losses occur as RF energy propagates through the air and along the RF path on the PCB. These losses are frequency-dependent and tend to be lower at lower frequencies.
To have full control over the emitted power, antenna characteristics, and transmission duty cycle, we recommend using a dedicated RF transmitter.
CAN THE APPLICATION BE POWERED DIRECTLY BY AN AEM?
AEMs can accept any type of storage elements with a voltage lower than 5 V. They are therefore compatible with supercapacitors, Li-ion batteries, LiPo, NiMH, hybrid supercapacitors, and more. However, there is an additional limitation on certain AEMs, which may have a lower voltage limit, such as the AEMxx920 for example.
HOW CAN WE CONFIGURE AN AEM?
AEMs can be configured using the GPIO pins by connecting them to a high state or to GND. However, some AEMs include I²C communication for the configuration and monitoring. This allows overriding the configurations set by the configuration pins and allows accessing to all the AEMs configurations, enabling wider range of settings and allowing live system monitoring