Pole-Mounted Cell Tower Chassis
Powered by PFC MegaPAC
Telecommunications, which replaced the word telephony, means much more than the original. The American Heritage Science Dictionary defines telecommunications as “sending and receiving information such as sound, visual images, or computer data over long distances through the use of electrical, radio, or light signals, using electronic devices to encode the information as signals and to decode the signals as information.” It certainly includes the telephone, both fixed and mobile; television, whether distributed by broadcast, coaxial cable, or fiber optic cable; and, of course, the Internet. The analog telephone coexists with the digital telephone, and the analog television was recently superseded by the digital telephone. Some companies offer all-digital telephones, television service, and, of course, the Internet. All of this is supported by a complex infrastructure, increasingly interrelated, some of it even shared by competitors.
One of the builders of telecommunications infrastructure is a Vicor customer. They are a turnkey telecommunication construction contractor that builds cell/microcell sites, installs fiber optic and coaxial cables, engineers and constructs pole-mounted power supplies, among other infrastructure projects. A cell tower chassis that they built required power conversion. The chassis – with dimensions of 42 by 28 by 10.5 inches – was designed to be mounted on a streetlight pole and contained the remote radio head, a site control and monitoring unit, and a Vicor PFC MegaPAC.
This high-power application (1250 W) required that power be taken from the power line and provide three DC voltages (25, -5, +5 V) with minimal ripple and noise. The PFC MegaPAC, an off-line power-factor-corrected AC-DC switcher, provides 1600 W and meets the conducted EMI requirements of FCC class A and EN55022.
Made in USA
