450W RF power transistor

摘要

Designers at Freescale are not fooling around. For the past two years they have been releasing product in their 50 V laterally diffused MOS (LDMOS) process. Now they are delivering an RF power transistor that targets the entire UHF band for broadcast TV (both analog and digital, of course), and the company reports that this latestp MRF6VP3450H device delivers 50 percent more power than its closest competitor. Percentages are nice, but here are numbers: 90 W average RF output power at 860 MHz for DVB-T and 450 W peak-envelope- power (two-tone test) with 21.5 dB minimum gain, 23 dB typical gain. This level of gain and power allows for tighter designs, such as providing 320 W average output power with only two gain stages and five devices.