PT78ST106S

DC DC Converters: PT78ST106S application field and working principle

PT78ST106S is a series of DC-DC converters produced by Protekpower. It is specially designed for automotive, communication, power supply industry and other applications.This converter has two different versions – converting 12V input to 5V, 3.3V, or 12V, 24V, or 28V and can handle up to 300W.

Features

• Input voltage range from 9V to 16V
• Exceptional reliability and long life
• Isolation between input and output, up to 3000 Volts
• Soft start function
• Extremely low standby current
• Compact size
• High efficiency up to 91%

Applications

Applications for the PT78ST106S DC-DC converter includes: automotive electronics, communications, electrical, security/alarm systems, power supplies and many more.

Working Principle

The PT78ST106S DC-DC converter is a non-isolated DC-DC converter, meaning that the input and output are not separated by a significant electrical barrier. The mechanism of this DC-DC converter is based on the buck-converter topology. The basic buck converter consists of a power switch, inductor, capacitor, and a diode – all connected in a specific order.

The main function of the power switch is to switch between open and closed states to allow or block current in the circuit. When the switch is opened, the current stops flowing and the voltage across the inductor is transferred to the output side. On the other hand, when the switch is closed, the current is allowed to flow from the input side to the output side.

In the case of the PT78ST106S DC-DC converter, the power switch is a MOSFET (metal-oxide-semiconductor field-effect transistors). The MOSFET allows the voltage to be increased or decreased as needed, by changing the duty cycle of the switch. This is how the DC-DC converter adjusts the input voltage to the desired output.

Conclusion

The PT78ST106S is a DC-DC converter with a power switch that can convert the input voltage into either 5V, 3.3V, 12V, 24V or 28V and can handle up to 300W output power. Its features provide exceptional reliability and soft start function. The working principle is based on the buck-converter topology and allows the voltage to be increased or decreased as needed, by changing the duty cycle of the power switch. This DC-DC converter is suitable for automotive electronics, communications, electrical, security/alarm systems, power supplies and many other applications.