PT7771N

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

DC–DC converters are electronic circuits which convert a source of direct current (DC) from one voltage level to another. The PT7771N is a non-isolated step-up DC–DC converter that provides high efficiency and a comprehensive set of features for a wide range of applications. The PT7771N is suitable for applications such as automotive and industrial applications.

Features

The PT7771N is a highly integrated dc/dc converter with integrated power switches, capable of 4 A continuous output current. Its main features include:

• Wide input voltage range - 6 ~ 60V
• High efficiency up to 97.7%
• Output Voltage range from 3.3 V to 13.2 V
• Programmable soft-start
• Frequency synchronization/current sharing
• Accurate output over power, over voltage protection
• Under voltage protection
• Over temperature protection
• 2.5 µA shutdown current

Application fields

The PT7771N is mainly used in the automotive and industrial sectors to step-up a DC voltage source with low output current or high voltage. It is suitable for applications such as automotive LCD displays, portable and handheld consumer electronics, industrial automation, point-of-sale systems, and industrial equipment and instrumentation.

Working principle

The PT7771N is a step-up DC/DC converter capable of outputting a regulated voltage with up to 4A of current. Its output voltage can be set over a wide range from 3.3-13.2 V, and its input voltage can be anywhere between 6-60 V. The converter works by converting a lower DC voltage in to a higher one, while also providing tightly regulated output voltage and current. The working principle of the PT7771N is the same as other DC/DC switching converters, by switching the input voltage to a higher amplitude voltage with the help of a MOSFET, Inductor, capacitor and a Control IC.

The MOSFET is used as a switch along with a feedback control loop and a regulator circuit. This combination of components forms the basic building blocks of a DC/DC converter and is used to switch the input voltage at a predetermined frequency. The switching frequency is determined by the control IC of the converter and is usually in the range of few hundred kHz. When the switch is turned on, the voltage across the inductor increases. When the switch is turned off, the current is forced out of the inductor and into the output filter capacitor, which helps to regulate the output voltage. Out-of-regulation or over-current/over-temperature conditions are detected and the IC will then shut off the switch to protect the load and the power supply from damage.

Conclusion

The PT7771N is a step-up DC/DC converter capable of outputting a regulated voltage with up to 4A of current. Its wide input voltage range, high efficiency, and comprehensive set of features make it suitable for a wide range of applications such as automotive and industrial applications. It works by converting a lower DC voltage to a higher one, while also providing tightly regulated output voltage and current, using the same components as other DC/DC converters.

The specific data is subject to PDF, and the above content is for reference