Highly efficient, regulated dual-output, ambient energy manager for up to 7-cell solar panels with optional primary battery

E-peas’ solar energy harvesting IC solution – AEM10941 – is an integrated energy management circuit that extracts DC power from up to 7-cell solar panels to simultaneously store energy in a rechargeable element and supply the system with two independent regulated voltages. The solar energy harvester AEM10941 allows to extend battery lifetime and ultimately eliminates the disposable battery energy storage element in a large range of wireless applications, such as industrial monitoring, geolocation, home automation, e-health monitoring and wireless sensor nodes

Features:

Ultra-low-power start-up:

• Cold start from 380 mV input voltage and 3 μW input power (typical)

Ultra-low-power boost regulator:

• Open-circuit voltage sensing for MPPT every 5 s
• Configurable MPPT with 2-pin programming
• Selectable Voc ratios of 70, 75, 85 or 90%
• Input voltage operation range from 50 mV to 5 V
• MPPT voltage operation range from 50 mV to 5 V

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-4.1 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 the 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 the battery when the secondary battery is exhausted

Integrated balun for dual-cell supercapacitor

Documents

 AEM10941 Datasheet

 AEM10941 Product Brief