Power Supplies for a Smarter World
The Internet of Things (IoT) is an umbrella term that covers many groups of related concepts, but in essence, these concepts share the following features: distributed intelligence, multiple interconnected sensors/actuators and decentralized control. In practice, IoT means that certain spaces, environments or objects can be made “smart” by incorporating sensors that can communicate to make them behave intelligently. IoT examples include offices that adjust themselves to ambient light levels or to human presence, machines that monitor their own health or homes that learn our daily routines to automatically save energy without compromising on our comfort.
All of this new technology needs power: either highly efficient, low standby consumption AC/DC power supplies that can be used in a smart office with hundreds of intelligent sensor nodes, very low input current switching regulators that can scavenge power from the output of a wired sensor, low cost isolated DC/DC power supplies for multiple input channels or a very low input voltage boost converter to generate a useful power supply from a single battery cell. Not every power supply is suitable for an IoT application. They must be highly efficient at both low load and full load, they must be space-saving, they must be reliable and, above all, they must be affordable as they will be as ubiquitous as the sensors, processors and actuators that they supply. The following selection of RECOM power supply products have been chosen because they meet all of these basic requirements.
Low profile AC/DC converters (2-3W)
R-78S evaluation board allows battery calculations
RECOM’s R-78S evaluation board allows engineers to effortlessly test the functionality of the R-78S switching regulator, which boosts a AA battery or external supply voltage to 3.3V for low power IoT applications. The evaluation board is equipped with several jumper headers to measure input and output current and voltage - allowing typical battery lifetime calculations in both active and standby mode.
R-78S boosts a AA battery to continuous 3.3V for IoT
The R-REF02-78S is a ready-to-use design for 3.3V IoT applications. It generates 3.3V from a single AA battery and can directly be used in any application. The reference design contains a AA battery holder and an R-78S3.3-0.1 boost converter. Two jumper headers J1 and J2 connect to the output voltage and the CTRL pin of the R-78S converter. An enable pin puts the R-78S into sleep-mode where it draws only 7uA from the battery.