Differential input voltage range equal to the power supply voltage.

Input common-mode voltage range includes ground.

Very low supply current drain (500 ♚) essentially independent of supply voltage.

Wide bandwidth (unity gain): 1 MHz (temperature compensated).

Internally frequency compensated for unity gain.

Available in 8-bump DSBGA chip-sized package (see AN-1112, SNVA009).

parametric-filter Precision op amps (Vos<1mV).

parametric-filter High-speed op amps (GBW ≥ 50 MHz).

parametric-filter General-purpose op amps.

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parametric-filter Programmable & variable gain amplifiers (PGAs & VGAs).

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parametric-filter Difference amplifiers.

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But the start and stop voltages will be set according to the battery’s voltage. The same procedure is done for other batteries. The circuit is tuned now you can connect the power supply back and remove the adjustable power supply. Now to set the start voltage of charging change the voltage of the adjustable power supply to 5.9V.

Now replace the power supply in this circuit with the adjustable power supply and do not connect any battery with the circuit. Since the voltage of a fully charged 6V battery s 7.3V on a DMM so set 7.3V on the adjustable power supply. For that, you will need an adjustable power supply and follow these steps. Circuit TuningĪ simple tuning needs to be done to charge the battery automatically. In this way, it will switch ON the whole charger circuit from the mains when the battery needs to be charged and switches off when the battery is charged fully. You can connect the relay to the main plug of the power supply. The LED4 will indicate that the battery is getting charged. When the battery’s charging is full LED1 will glow. They are used to set start and stop voltages for the charging process of the battery. Both are connected with variable resistors VR1 and VR2. These two op-amps are working as a comparator to detect the voltage of the battery.

We are using an operational amplifier IC LM358 that has two built-in op-amps.

Lm358 pinout download free