PT78ST115S

DC DC Converters

PT78ST115S is a type of DC-DC Converter module. It is a step-down converter featuring a wide input voltage range from 9-18V, and a single output from 0.75 to 16V. It features an efficiency of up to 97.5%, and a maximum peak current of 19A. It is designed to provide a safe and economical power solution for applications that require up to 16V DC.

Application Field

The PT78ST115S module is ideal for power supply applications which require a high efficient, low noise and cost-effective solution. It is typically used in commercial equipment such as industrial controls, medical devices, test and measurement, LED lighting, and automotive applications. Additionally, it is well-suited for use incaptive power systems as well as for powering PoE (Power over Ethernet) devices.

Working Principle

The PT78ST115S module works on the principle of voltage conversion. It follows a multi-stage step-down conversion process which includes transformer isolation, rectification, and buck-converters in order to provide a stable output voltage. The module features a Synchronous Buck-Converter topology, which includes a high-frequency power inductor and a high-efficient MOSFET switch. This topology allows for a wide input voltage operating range and very high efficiency.

The PT78ST115S Converter Module operates in constant voltage and current modes. It supports two soft start modes which are Peak Current Limit and Active Voltage Feed Forward. The soft start modes enable the converter to quickly recover from very low input voltage conditions. The active voltage feed forward mode activates the MOSFET switch once the input voltage reaches the under-voltage lockout (UVLO) level.

The PT78ST115S module can be used in a wide variety of applications. It can be used as a simple step-down DC-DC converter to provide a regulated output voltage. It can also be used to power low-power PoE devices, as a held-up power supply converter, and as a controlled slave or synchronous Buck-Converter. Regardless of the application, the PT78ST115S has the advantage of providing a high efficient, low-noise power solution.

Conclusion

The PT78ST115S module is a high efficient, low-noise dc-dc buck converter designed to provide reliable and economical power solutions. It is ideal for use in commercial and industrial applications such as motor controls, medical devices, LED lighting, and automotive systems. It works on the principle of voltage conversion and features multiple soft start modes. The module is well-suited for use in PoE applications as well as for powering captive power systems. It is a highly efficient, economical solution for providing a regulated DC voltage.