Achieving high efficiency in telecom power supplies
primary and backup power makes it easier to design and maintain backup systems. Additionally, lower voltages such as -48 V DC are safer for personnel working with telecom equipment, reducing the risk of electrical shock and injury. Power supplies for telecommunications equipment must meet specific operational requirements to ensure reliability and efficiency. Here are some important specifications: ■ Input voltage range: The power supply should be designed to tolerate a broad input voltage range. ■ Voltage regulation: The power supply must provide a stable and regulated output voltage per the requirements of the telecom equipment. ■ High efficiency: Power supplies should be highly efficient to reduce power loss and energy consumption. Efficiencies of at least 90% are typical. ■ Redundancy: To ensure uninterrupted operation, power supplies frequently include redundancy features such as N+1 where an additional power supply is used. If one fails, the other can assume the burden.
■ Hot-swappable: In mission- critical installations, power supplies should be hot- swappable, assuring minimal downtime during replacement or maintenance. ■ High reliability: The power supply should be equipped with protection mechanisms to avert damage caused by adverse operating conditions, such as overcurrent, overvoltage, and short-circuits.
The active clamp forward converter The active-clamp forward converter (ACFC) is a DC/DC converter configuration common in power supply systems, and it is primarily utilized for converting -48 V DC to positive voltage levels. The ACFC is a voltage conversion circuit that integrates characteristics from the forward converter and the active-clamp circuit to enhance efficiency.
56
Powered by FlippingBook