12 Volt Battery charger

12 Volt Battery charger

The following schematic is a high-performance battery charger for gelled electrolyte lead acid battery. Battery charger quickly recharges lead acid battery  and shuts off at a full charge. Innitially, charging current has limitations to 2 Ampere. While the battery voltage goes up, current to the lead acid battery  decrease, and if the current has decrease to 150 mA, the battery charger changes to a lower float voltage protecting against overcharge.

When the  switch is actually pressed, the output of the battery charger would go to 14,5 V. As the battery nears complete charge, the charging current decreases and the output voltage is lowered from 14.5 V to around 12,5 V terminating the charging. Transistor Q1 finally lights the LED as visual warning sign of full charge. (Source : National Semiconductor Corp. Voltage Regulator Hanbook.)

Power supply is an electronic device that supplies electric energy to an electrical load. The primary function of a power supply is to convert one form of electrical energy to another and, as a result, power supplies are sometimes referred to as electric power converters. Some power supplies are discrete, stand-alone devices, whereas others are built into larger devices along with their loads. Examples of the latter include power supplies found in desktop computers and consumer electronics devices.


Tags: 12 volt battery charger 12 volt battery chargers 12v battery charger battery charger 12v lead acid battery charger LM 301

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