Nowi’s flexible maximum power point tracking algorithm

August 10, 2019 * Delft, the Netherlands

Maximum power point tracking is a method to achieve the highest energy harvesting efficiency even when the energy input changes. This particularly important for IoT applications as these devices are placed in various environments where the energy source might change over the course of time.

This video explains how Nowi’s MPPT method is different from traditional solutions.

1. Maximal energy harvesting efficiency

Energy harvesters behave differently depending on environmental conditions. Traditional solutions require an application engineer to pre-program the device to work well in a limited set of conditions. Nowi’s MPPT uses flexible algorithm to find the exact maximum power point in any condition, resulting in a maximal efficiency over a wide range of inputs.

2. Independent on harvesters’ specific parameters

Nowi’s patented MPPT method use the converter output as a key parameter for changing the conversion settings. Unlike existing alternative solution, Nowi’s MPPT is independent on specific parameters of the harvester. Therefore, any harvester whose required outputs fit the specifications of the chip can be used without losing any efficiency during its operation.That means the same chip design can be used for different types of harvesters such as thermoelectric generator, PV cell, or even RF energy harvester.

3. No external components needed for MPPT to function

Nowi’s MPPT uses a flexible algorithm which changes its own parameters. This logic requires no external components , whereas other IC may require up to 6 external components for their MPPT alone to function. This means that the product footprint on the PCB is reduced and the BOM costs are lowered.

4. Self-programmable

The Nowi MPPT is completely self-programmable and therefore requires no additional application engineering in order to function, making it highly adaptive. This pattented MPPT is a key feature of Nowi’s PMIC to achieve Plug & Forget IoT devices.

August 10, 2019 | Delft, the Netherlands