LM7812 detailed Chinese information

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LM7812 Chinese information

Three-terminal regulator integrated circuit lm7812. In electronic products, common three-terminal regulator ICs have a positive voltage output of lm78 × × series and a negative voltage output of lm79 × × series. As the name implies, the three-terminal IC refers to the integrated circuit for this voltage regulation. There are only three pins for output, which are the input terminal, the ground terminal and the output terminal. It looks like an ordinary triode, the TO-220 standard package, and the lm9013-like TO-92 package.

LM7812 package

Lm7812 introduction

The lm78 series three-terminal regulator IC is used to form a regulated power supply with few external components. The circuit also has overcurrent, overheat and regulation tube protection circuits, which are reliable, convenient, and inexpensive. The numbers behind the lm78 or lm79 in this series of integrated regulator IC models represent the output voltage of the three-terminal integrated regulator circuit. For example, lm7806 indicates that the output voltage is positive 6V, and lm7909 indicates that the output voltage is negative 9V. Because the three-terminal fixed integrated voltage regulator circuit is convenient to use, it is often used in electronic production.

The maximum output current is 1.5A, and the output voltage of LM78XX series is 5V; 6V; 8V; 9V; 10V; 12V; 15V; 18V; 24V.

Practical application

In practical applications, a large enough heat sink should be installed on the three-terminal integrated voltage regulator circuit (of course, under low power conditions). When the temperature of the Zener tube is too high, the voltage regulation performance will be deteriorated or even damaged.

When a constant voltage power supply capable of outputting more than 1.5A is required in the production, several three-terminal voltage regulator circuits are usually connected in parallel to make the maximum output current of N 1.5A, but the application should pay attention to the integration of the parallel use. The voltage circuit should use the same manufacturer and the same batch of products to ensure the same parameters. In addition, there is a certain margin on the output current to avoid the chain burnout of other circuits when the individual integrated voltage regulator circuit fails.

The above is part of the information, see the PDF document for more details!