Photovoltaic
Harvesting energy from various light sources: sun, bulbs, natural indoor light, etc.
Thermal
Harvesting energy from various thermal sources: waste heat, human heat, motor, etc.
Vibration
Harvesting energy from various vibration sources: motors, railroads, cattle, etc.
RF
Harvesting energy from various RF sources: 868MHz, 915MHz, 2.4 GHz, etc.
AEM40940 – Energy Harvesting Power Management IC
Description
E-peas’ RF energy harvesting IC solution – AEM40940 – is the next generation integrated energy management subsystem integrating a rectifier that extracts AC power from ambient RF waves to simultaneously store energy in a rechargeable element and supply the system with two independent regulated voltages. This allows product designers and engineers to extend battery lifetime and ultimately get rid of the primary energy storage element in a large range of wireless applications like industrial monitoring, home automation, wearables.
Features
Ultra-low power start-up:
- RF input power from -19.5dBm up to 10dBm (typical)
- Cold start from the RF input or from the storage device
Ultra-low power boost regulator:
- Open-circuit voltage sensing for MPPT every 0.33s
- Configurable MPPT with 2-pin programming
- Selectable Voc ratios of 60, 65 or 70 %
- Input voltage operation range from 50mV to 2.5V
- MPPT voltage operation range from 50mV to 2.5V
- Constant impedance Matching (ZMPPT)
Integrated 1.2/1.8 V LDO regulator:
- Up to 20 mA load current
- Power gated dynamically by external control
- Selectable output voltage
Integrated 1.8 V-3.3 V LDO regulator:
- Up to 80 mA load current with 300 mV drop-out
- Power gated dynamically by external control
- Selectable or adjustable output voltage
Flexible energy storage management:
- Selectable overcharge and overdischarge protection
- For any type of rechargeable battery or (super)capacitor
- Fast supercapacitor charging
- Warns the load when battery is running low
- Warns when output voltage regulators are available
Smallest footprint, smallest BOM:
- Only seven passive external components
Optional primary battery:
- Automatically switches to the primary battery when the secondary battery is exhausted
Integrated balun for dual-cell supercapacitor
Documentation
| Description | Version | Updated | Download |
|---|---|---|---|
| AEM40940 product brief | PB_AEM40940_REV1.4 | 17/05/2018 | Download |
| AEM40940 datasheet | DS_AEM40940_REV1.1 | 25/09/2018 | Download |
| Configuration tool | REV1.1 | 21/08/2018 | Download |
| AEM40940 user guide | UG_AEM40940_REV1.0 | 25/09/2018 | Download |
| AEM40940 EvB Quick start Guide | QSG_AEM40940_REV1.1 | 29/07/2019 | Download |
| ALTIUM and EAGLE files about the AEM40940 / Simplified schematic and BOM | AEM40940_XXC_V1.2 | 29/07/2019 | Download |