Dual Mode Battery Charger Circuit Using Adjustable Positive-Voltage Regulator

This dual mode battery charger is a simple electronic device that features the two essential modes of a battery charger. It has both the constant voltage and constant current characteristics which both prevents overcharging in batteries. The device specifically uses the Texas Instruments’ LM317L, an adjustable, 3 terminal, positive voltage regulator capable of supplying 100mA over an output voltage range of 1.25V to 32V. It is easy to use and requires only two external resistors to set the output voltage. Read more

Single Cell Li-Ion/Li-Po Battery Charger

The design is a a charging circuit for lithium-ion and lithium-polymer batteries. It is a low cost design that can charge batteries of equipments like portable, medical, and industrial devices. Read more

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Ultra-low-power Energy Harvester and Battery Charger

The electronic gadgets are the most popular devices that are being used by everyone today, and how it is quickly drained up is the most common problem. The circuit as shown in the reference design is the STEVAL-ISV09V1, which is an evaluation board for SPV1050. The SPV1050 is a transformerless thermoelectric generators and PV modules energy harvester, comes with high efficiency for any harvesting source and has a maximum of 70mA maximum battery charging current. It also allows to charge any type of battery which includes thin film batteries which need proper monitoring provision of the length of charging and voltage level of batteries to ensure that battery life is preserve.Read more