AEM10940

Description

Example of how e-peas AEM10940 integrates integrates an ultra-low-power to charge a storage element, such as a Li-Ion battery, a thin film battery or a super- or conventional capacitor.

The AEM10940 is an integrated energy management subsystem that extracts DC power from PV cells or TEGs 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, geolocation, home automation, wearables…

The AEM10940 harvests the available input power from 1 μW to 50 mW. It integrates an ultra-low-power Boost converter to charge a storage element, such as a Li-Ion battery, a thin film battery or a super- or conventional capacitor. The Boost converter operates with input voltages in a range of 100 mV to 2.5 V. With its unique cold-start circuit, it can start operating with an empty storage element at an input voltage as low as 380 mV and an input power of just 11 μW.

The low voltage supply typically drives a microcontroller at 1.8 V. The high voltage supply typically drives a radio transceiver at a configurable voltage. Both are driven by highly efficient LDO (Low Drop-Out) regulators for low noise and high stability.

Configuration pins determine various operating modes by setting predefined conditions for the energy storage element (overcharge or overdischarge), and by selecting the voltage of the high voltage supply. However, special modes can be obtained at the expense of a few configuration resistors.

The chip integrates all the active elements for powering a typical wireless sensor. With only seven external components, integration is maximum, footprint and BOM are minimum, optimizing the time-to-market and costs of WSN designs in all markets.

Five identical capacitors and two inductors are required, available respectively in the small 0402 and 0603 SMD formats. The AEM10940 comes in one packaging option, with 24 pins, using space-saving quad-flat-no-leads packages (QFN).

Features

Ultra-low-power start-up

  • Cold start from 380 mV input voltage and 11 μW input power (typical)

Ultra-low-power Boost regulator

  • Configurable MPPT with single-pin programming
  • Open circuit voltage sensing for MPPT
  • Input voltage operation range from 100 mV to 2.5 V

Integrated LDO regulator at low voltage

  • 1.8 V, high efficiency
  • Up to 10 mA load current

Integrated LDO regulator at high voltage

  • Configurable from 2.2 V to 4.2 V, high efficiency
  • Up to 80 mA load current with 300 mV drop-out
  • Power gated by external control

Flexible energy storage management

  • Programmable overcharge and overdischarge protection
  • Suitable for any type of rechargeable battery or (super)capacitor
  • Fast supercapacitor charging

Smallest footprint, smallest BOM

  • Only seven passive external components

Documentation

Description Version Updated Download
AEM10940 product brief PB_AEM10940_REV1.1 17/11/2016 Download
AEM10940 data sheet DS_AEM10940_REV1.3 17/11/2016 Download
AEM10940 application note for the evaluation board AN_AEM10940_REV1.2 17/11/2016 Download

Tools

  • Evaluation Board

    The AEM10940 Evaluation Board is a printed circuit board (PCB) assembly featuring all needed components to put in operation the AEM10940 integrated circuit (IC) from e-peas. Please refer to the AEM10940 data sheet for all useful details about this IC.

    It allows you to test the component and analyze its performance in a laboratory-like environment. The AEM10940 Evaluation Board is not intended for final implementation in an end-user application.

    The board provides easy connections to the source of harvested energy, the storage element, the low voltage load and the high voltage load. It includes all the configuration items to set the device in any modes described in the data sheet. The control and status pins are available on standard pin headers, enabling wiring for any usage scenario and evaluation of the corresponding performance.

    The AEM10940 Evaluation Board is your indispensable tool to take appropriate decisions (component selection, operating modes…) regarding the design of a highly efficient energy harvester subsystem in your target application.

    Order this tool