Part Number: 7812CV, L7812CV

Function: 12V, Voltage regulator

Package: TO-220, D2PAK, TO-3 Type

Manufacturer: STMicroelectronics

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Description

The 7812CV, L7800 series of three-terminal positive regulators is available in TO-220 ISOWATT220 TO-3 and D2 PAK packages and several fixed output voltages, making it useful in a wide range of applications.These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation.

Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.

Pinouts:

Features:

1. OUTPUT CURRENT UP TO 1.5 A

2. OUTPUT VOLTAGESOF 12 V

3. THERMAL OVERLOAD PROTECTION

4. SHORT CIRCUIT PROTECTION

5. OUTPUT TRANSITION SOA PROTECTION

7812CV PDF Download

Part Number: S1854

Function: Silicon NPN Transistor, Voltage Regulator

Package: TO-220AB Type

Manufacturer: Toshiba, ETC

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Description

The S1854 is a regulator driver for line operated TV, which are built up of error amplfier transistor, standard voltage zener diode and poly-silicon resistors on monolithic chip.

A regulator driver, also known as a voltage regulator or power supply, is an essential component in line-operated TVs (television sets). The purpose of the regulator driver is to maintain a stable and regulated voltage for the different components of the TV, ensuring proper operation and preventing damage from voltage fluctuations.

In a line-operated TV, the power supply typically converts the AC (alternating current) input from the power outlet into the DC (direct current) voltages required by the various components. This includes supplying the appropriate voltage to the main circuit board, audio amplifier, video processor, backlighting system (in the case of LCD or LED TVs), and other components.

The regulator driver within the power supply unit ensures that the voltage levels delivered to these components remain consistent and within the specified range. It achieves this by employing voltage regulation techniques such as voltage feedback loops and voltage regulators (such as linear regulators or switch-mode regulators) to stabilize the output voltages.

Features

1. Possible to Eliminate the output voltage adjustment of regulator stage in line operated TV, combined with the usual power transistors.

2. Excellent temperature characteristics of regulated output voltage.

Absolute maximum ratings ( Ta=25°C )

1. Collector to Ground Voltage : Vcgo = 150 V

2. Collector to +B output Voltage: Vcbo = 150 V

3. +B Output to Ground Voltage : Vbgo = 120 V

4. Collector Current: Ic = 50 mA

5. Power dissipation : Pd = 1.5 W

6. Junction Temperature: Tj = 150°C

7. Storage Temperature : Tstg = -55 ~ +150°C

S1854 PDF Datasheet

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