VBT2-S12-S12-SMT-TR Power Supplies - Board Mount

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DC DC Converters

DC DC converters have become an increasingly important component in the world of electronics. With the advent of energy-efficient microprocessors and other digital elements, the need for these devices has increased greatly in recent years. The two main types of DC DC converters are the VBT2-S12-S12-SMT-TR (VVSTI) and the Interconnected DC-DC (IDC) converters, each of which has its own specific applications and working principles.

VBT2-S12-S12-SMT-TR Application and Working Principle

The VBT2-S12-S12-SMT-TR is a highly efficient AC-DC converter designed for use in consumer electronics, computers, and other electronic equipment. It is a dual-speeder converter that utilizes the synchronous rectification of two high-speed inverters to provide high-frequency current. The converter utilizes two different switching circuits, namely the primary-side (Q1) circuit and the secondary-side (Q2) circuit. The VBT2-S12-S12-SMT-TR is used primarily for single-phase fixed-frequency applications where high efficiency and output current are required. The output power can be controlled through pulse-width modulation (PWM) techniques.

The VBT2-S12-S12-SMT-TR converter operates on a zero-voltage switching (ZVS) technique, which has the advantage of zero power losses across switches. The primary side of the converter begins in a fully-charged state, while the secondary side is held in the fully-discharged state. As the duty cycle of the control signal increases, the primary side is discharged, and the secondary side is charged. The resulting increase in average voltage appears across the converter. This voltage is referred to as the “droop voltage.” The ZVS ensures that no power is lost through the switching process, providing the converter with high efficiency.

Interconnected DC-DC Application and Working Principle

Interconnected DC-DC converters are relatively new to the market and are used in high-power applications due to their high efficiency and output power ratings. An IDC converter is a two-stage switched-mode DC-DC system that utilizes two separate power sources. The primary power source is typically an AC power source, such as a utility grid or a solar array, while the secondary power source is typically a battery. The two power sources are interconnected through a transformer, which provides galvanic isolation between the power sources and ensures that any fluctuations in the primary power source are not transmitted to the secondary power source.

When the IDC converter is operating, the transformer functions as an isolation transformer, meaning no power is transmitted between the two power sources. Instead, the primary power source is used to drive a primary stage switching converter, which sends current to the secondary power source, which is typically a battery. The secondary stage switching converter then converts the battery voltage to the desired output voltage.

The primary stage switching converter operates on a pulse-width modulation (PWM) technique to control the output voltage and current. When the control signal is high, the primary stage switching converter is turned on, and the current from the primary power source is transmitted to the battery. When the control signal is low, the primary stage switching converter is turned off, and the current from the primary power source is simultaneously returned to the primary power source, ensuring that power is conserved.

The secondary stage switching converter also operates on a PWM technique, but it modulates the voltage of the battery rather than the current. When the control signal is high, the secondary stage switching converter is turned on, and the voltage of the battery is decreased. When the control signal is low, the secondary stage switching converter is turned off, and the voltage of the battery is increased.

The combination of the two converters provides a highly efficient DC-DC system that can provide up to 100% efficiency. Additionally, the galvanic isolation provided by the interconnection between the two power sources ensures that there is no risk of interference from the primary power source.

In summary, the VBT2-S12-S12-SMT-TR and the Interconnected DC-DC converters are two of the most popular types of DC-DC converters on the market. The VBT2-S12-S12-SMT-TR utilizes synchronous rectification to produce high-frequency current, while the IDC converter utilizes interconnection and PWM techniques to create high efficiency. Both of these converters are used to convert AC power to DC power in a variety of electronic devices.

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