PT7779N1

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DC DC converters are electronic components that modify electrical signals or energy from one DC voltage level to another. Among its applications are voltage conversion, signal isolation and power amplification. The PT7779N1 is a DC/DC converter designed for telecoms, Ethernet over copper and high-speed serial interconnect systems.

The PT7779N1 supports the telecom industry’s requirements for high efficiency, fast load transient, low output noise, and wide input voltage range. It offers a maximum power output of 15W from its single output and a wide operating temperature range of -40°C to +85°C, allowing the device to provide high efficiency in a variety of environments. Moreover, its 6-pin Mini-DIP package allows space saving for installations.

The PT7779N1 is designed with a switched-mode power conversion topology. This topology consists of an input filter, an input rectifier, a DC/DC converter or chopper, an inductive or capacitive input filter, an output rectifier and an output filter. The input rectifier circuit consists of diodes which rectify the incoming signal, while the DC/DC converter or chopper circuit converts the input DC into a chopped or pulsed DC and sends that to an output rectifier circuit. The output rectifier circuit further rectifies the signal and sends it to the output filter. The output filter smoothes and filters the signal, producing the final output voltage or current.

The PT7779N1 employs an active power factor correction (APFC) technique for regulating its input current and power. This technique adjusts the input current and power during operation in response to changes in the input voltage, ensuring a more consistent power output. Moreover, the device also uses a green-mode feature to further improve efficiency. This feature utilizes a step-down pulse-width modulation (PWM) to limit the output voltage to a save level in light-load conditions. These features overall ensure high efficiency even in light load scenarios, reducing total power consumption.

In terms of applications, the PT7779N1 is suitable for a wide range of telecommunications applications, including Gigabit Ethernet over copper, SDH, PoE, Ethernet power injector, digital video and multiplexer applications. It is also suitable for Ethernet switching, routing, hubs and bridges, as well as for DWDM systems. Furthermore, the device is well suited for thin clients, industrial PC, networking equipment, HFC networks and SERDES systems.

To conclude, the PT7779N1 is a high performance DC/DC converter designed for high efficiency telecom applications. It employs an active power factor correction technique for regulating its input current and power as well as a green-mode feature to further improve efficiency in light load conditions. The device is well suited for a host of applications in telecommunications, such as Gigabit Ethernet over copper, SDH, PoE, Ethernet power injector, digital video and multiplexer applications, Ethernet switching, routing, hubs and bridges, DWDM systems, thin clients, industrial PC, networking equipment, HFC networks and SERDES systems.

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