VAT2-S12-D9-SMT-TR

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DC-DC converters, or DC-DC power supplies, are used to convert a source of direct current (DC) from one voltage value to another. This is typically done to power equipment from a higher voltage source than it was designed for. The VAT2-S12-D9-SMT-TR is a switching DC-DC converter specially designed for unregulated input sources from 4.8V up to 12V, and the output provides a stabilized 9V at 300mA.

The VAT2-S12-D9-SMT-TR is typically used in automotive or medical applications, specifically when a large DC voltage is available between 12V and 4.8V, and a stable output of 9V is required (at 300mA maximum). For example, it can be used to supply power to an LCD display that needs 12V or 4.8V input to the converter, and 9V output to the LCD.

The main components that make up the VAT2-S12-D9-SMT-TR, are a feedback voltage error amplifier, an opto-coupler, a power transistor, an active power electronic switch, and protection components.The feedback voltage error amplifier constantly compares the output voltage with the preset value of the reference voltage of the power supply system. Any difference between the two is amplified and fed back to the power transistor as a signal.When the reference voltage of the power supply exceeds the preset value of the output voltage of the power supply, the opto-coupler constantly sends a signal to the power transistor to turn the transistor on and off.This turns the power electronic switch on and off in order to regulate the output voltage of the power supply.

The optocoupler, or optotransistor, is a key component of the VAT2-S12-D9-SMT-TR. Its purpose is to send a signal between different circuits without allowing direct current (DC) flow. This avoids any potential interference from the input voltage to the output load. It also serves as an isolation barrier and protection from electromagnetic interference.

The power transistor, also known as a MOSFET, acts as a switch to turn the power electronic switch on and off to regulate the output voltage of the converter. The active power electronic switch is essentially a high-speed switch that can be triggered to open almost instantaneously.

Protection components such as overcurrent and overtemperature are also included in the VAT2-S12-D9-SMT-TR. These components are used to protect the converter from any adverse conditions, such as overload or over-temperature.

In summary, the VAT2-S12-D9-SMT-TR is a DC-DC converter specifically designed for unregulated inputs from 4.8V up to 12V, with an output of 9V at a maximum of 300mA. It is typically used for automotive or medical applications, and its components include a feedback voltage error amplifier, an opto-coupler, a power transistor, an active power electronic switch, and protection components.

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