The evaluation board is equipped with several jumper heads that measure input and output current and voltage, allowing the battery life to be calculated in both active and standby modes.
The R-78S Evaluation Board demonstrates the performance of the R-78S boost converter, which increases the voltage of a single-cell AA battery from 1.5V to a stable 3.3V. This ensures significantly higher power capacities and reduces maintenance costs compared to coin cell batteries. This effectively extends the operating life of an application, as the boost converter continues to function at a low voltage of 0.65V. The Evaluation Board offers the option of using other low-voltage sources, as well as energy harvesting devices, which are typical in remote applications. The load can be connected via output pins or a microUSB port. Test points for measuring voltages and currents allow engineers to fully evaluate the wide input voltage range up to 0.65V, the high efficiency, and the low standby losses—all of which extend the life of an AA battery and even make MEMS power supplies feasible. RECOM also introduces the R-REF02-78S Reference Design Board, a compact, ready-to-use design for 3.3V IoT applications. To cover a wider range of applications, RECOM has expanded the R-78S series with 1.8V versions for Bluetooth and 3.6V versions for LoRaWAN transmission units. The R-78S Evaluation Board, the Reference Design Board, and R-78S converters are available from authorized distributors.

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