About IC 7812 Voltage regulator
7812 Voltage regulator is a type of self-contained fixed linear voltage regulator integrated circuit. The IC belongs to ic 78xx voltage regulator family.
The 7812 voltage regulator IC is ease-of-use and available in very low cost. The last two digits of 7812 indicates the output voltage that is 12 V
The ic 7812 is a positive voltage regulator which means that it generates the positive voltage with respect to the common ground.
In case if both the positive and negative voltage supply is needed in the same circuit. The voltage regulator ic 7812 is combined with its corresponding 79XX family IC that is 7912 IC.
The voltage regulator 7812 is available most commonly in TO-220 packageas well as TO-3, TO-92 and surface mount Packages.
The ic 7812 Voltage regulators do operate at their optimal capability, if the input voltage is at least 2.5 volt greater than the output voltage (i.e 14.5 V min.) and the current is 1 or 1.5 Amperes more. Though the voltage and current difference is different for other IC Packages.
How to use IC 7812
The 7812 ic have 3 pins.
- The positive input is at pin 1.
- The Pin 2 is common between both input as well as output voltage.
- Pin 3 is a positive output.
When using the voltage regulator setup, you need to take care of the current through the voltage regulator ic do not exceed beyond the capacity which is mentioned in the datasheet or else it may blow off. You also have to be careful with the connection you are making with the voltage supply. Reverse polarity does get the ic heat up really quickly, you can also use a pn junction diode in order to prevent such a condition.
Also read jk flip flop.
You can use the capacitors in order to minimize the voltage fluctuations in the circuit and maintains the constant voltage across the input as well as output of the circuit.
Advantages of ic 7812
- 7812 voltage regulator ic does not require any component to balance or saturate their output voltage.
- The 7812 ic has a built-in protection from the high current. It has a heat-sink with the common ground connected with it. The heat sink prevents our regulator ic from overheating and short-circuits.
Also see types of transistor explained.