Full-brick DC/DC converter is a ‘drop-in’ replacement for new and old 24 V input designs

The PKY2616PI delivers 600W output power and typically exceeds 94 percent efficiency. The device’s efficiency curve is virtually flat from 30 percent to 100 percent load. This excellent level of performance is achieved by using a specially optimized topology and advanced rectification techniques (patent pending).

The device is designed for 24V DC system voltages and has an input voltage range of 18-36V. For safety and availability, it can withstand up to 50V input continuously. The output voltage is factory set at 28V and the device features an ultra-wide output voltage trimming range that can be adjusted from 32V down to 10V, making the PKY2616PI extremely flexible and useful for different RF power amplifier technologies and applications, as well as other applications that require a regulated voltage, such as cooling fan trays in forced convection cooled equipment.

The PKY2616PI has a typical 20mV load and line regulation with ±1 percent set voltage over a base-plate temperature range of -40 to 100 degrees C. The device delivers full power at 100 degrees C base plate temperature, and uses only high-reliability ceramic capacitors. Fully current-limit protected, the device has overvoltage protection on input and output connections. The PKY4716PI fully complies with ROHS requirements and, with its low component count, offers high reliability.

Ericsson Power Modules’ PKY2616PI has greater efficiency than other similar products on the market, and will contribute to lower operational expenditure for the end user. The very high control-loop bandwidth in the converter means that a minimum of external filter components are needed, resulting in greater economy and real estate savings for new RF power amplifier designs. Normally, an input filter is not needed if the input feeding impedance to the PKY2616PI is low enough.

Ericsson Power Modules’ lengthy experience and extensive knowledge of DC/DC converter design and systems are fully utilized in the PKY2616PI to optimize all aspects of performance and meet market needs in terms of cost and performance. The unique use of magnetic, planar technology, switching technology and new advanced synchronous rectification make it very different to competitors’ products.

The device's mechanical design has been refined to be cost-effective and offer very efficient thermal management to handle the extreme power levels of high-performance DC/DC converters. It combines robust and flexible design and good thermal management, which, together with its manufacturing design, results in a very cost-effective unit, ensuring low life-cycle costs for the end user.

Factors driving demand for this type of device include applications where higher output power is required, such as in WCDMA base transceiver stations. Higher output power means increased demands on efficiency to reduce power losses and energy usage. It is estimated that 1 watt of power loss at board level is worth about USD 10 (USD 6-15, depending on the cooling principle and system architecture) in operating expenditures over a five-year period.