e-peas AEM30300 RF Energy Harvesting Battery Charger

e-peas AEM30300 RF Energy Harvesting Battery Charger is a highly versatile buck-boost ambient energy manager battery charger for AC/DC sources. This charger extends battery lifetime and can even eliminate the primary energy storage element. The AEM30300 charger features a 100mV to 4.5V MPPT voltage operation range and cold start from 275mV input voltage and 3µW input power (typical). This battery charger consists of two capacitors (10µF and 22µF) and comes in a QFN 28-pin 4mm x 4mm package. Typical applications include asset tracking/monitoring, industrial, retail ESL/smart sensors, aftermarket automotive, and smart home/building.

Features

Ultra-low power start-up:
- Cold start from 275mV input voltage and 3µW input power (typical)
Very efficient energy extraction:
- Open-circuit voltage sensing for Maximum Power Point Tracking (MPPT)
- Selectable open-circuit voltage ratios from 35% to 80% or fixed impedance
- Programmable MPPT sensing period
- 100mV to 4.5V MPPT voltage operation range
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
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 three external components are required
- One 10µH inductor
- Two capacitors:
  - One 10µF
  - One 22µF
-40°C to 125°C operating junction temperature range
-65°C to 150°C storage temperature range
QFN 28-pin 4mm x 4mm package