e-peas AEM00330 Ambient Energy Manager
e-peas AEM00330 Ambient Energy Manager is an integrated energy management circuit that extracts DC power from an ambient energy harvesting source to supply an application and store energy in a storage element. This allows the battery to last longer and ultimately eliminates the primary energy storage element in a wide range of applications.
At start-up, the user can choose between charging the storage element first to accumulate energy before the application circuit starts or charging the load decoupling capacitor first to start the application circuit faster.
Thanks to its selectable operating input voltage, the AEM00330 can be set to operate at a voltage between 140 mV and 4.5 V.
With its unique cold start circuit, the AEM00330 can start harvesting with an input voltage as low as 275 mV and from an input power of 3 μW. The preset protection levels determine the storage element voltage protection thresholds to avoid overcharging and over-discharging the storage element and thus avoid damaging it. Those are set through configuration pins. Moreover, custom threshold voltages can be obtained at the expense of a few configuration resistors.
The load voltage can be selected to cover most application needs, with a maximum available load current of 60 mA.
The chip integrates all active elements needed to power a typical wireless sensor. Only three capacitors and one inductor are required.
Features
- Ultra-low power start-up, cold start from 275mV input voltage and 3µW input power (typical)
- Constant input voltage regulation
- Optimized for intermittent and pulse power
- Selectable operating input voltage from 140mV to 4.5V
- Adaptive and smart energy management
- DCDC switches automatically between boost, buck-boost, and buck operation, according to input and output voltages, to maximize energy transfer
- DCDC automatically handles multiple inputs and outputs
- Keeps the internal supply and the load voltages regulated while storing the excess energy in the storage element
- The storage element can be used as an input to keep the load and internal voltages regulated when no energy is available on the source
- Load supply voltage
- Selectable load voltage from 1.2V to 3.3V
- Current drive capability, 30mA in low power mode and 60mA in high power mode
- Battery protection features
- Selectable over-charge and over-discharge protection for any type of rechargeable battery or (super-) capacitor
- Fast super-capacitor charging
- Dual cell super-capacitor balancing circuit
- Small footprint and small BOM
- Only four external components are required
- One 10µH inductor
- Three capacitors, one 10µF, one 22µF, one at least 40µF
Applications
- Door access systems
- Smart wearable sensors
- Smart switches home/building
- Point-Of-Sales (POS)
Typical Application Circuit
Schematic Diagram
Dimension Diagram
Evaluation Tools
e-peas AEM00330 Evaluation Board
Printed circuit board featuring components to operate the AEM00330 integrated circuit (IC).