Date: 25/03/2011

Transistors for UHF and FM broadcast with improved thermal properties

NXP Semiconductors N.V. has announced addition of new transistors to its UHF and FM broadcast family of semiconductor devices.

They are,
BLF888A transistor: - 125 Wavg DVB-T with 32 percent efficiency, 21 dB gain, capable of covering the full UHF band.
BLF888B transistor: - optimized for use in a Doherty configuration, achieving 50 percent efficiency at 120 W output power and 18 dB gain.
BLF879P transistor: - 95 Wavg DVB-T with 32 percent efficiency, 20 dB gain, capable of covering the full UHF band.
BLF884P transistor: - 70 Wavg DVB-T with 33 percent efficiency, 21 dB gain, capable of covering the full UHF band

The highlighted device is BLF888B which can be configured as a doherty power amplifier and can achieve breakthrough 50 percent DVB-T efficiency targeting UHF broadcast system.

The advantages of these transistors include:
Improved ruggedness over the full UHF frequency band from 470 to 860 MHz, which enables the application to withstand extreme mismatches
Lowest thermal resistance in the market (Rth = 0.15 K/W) for BLF888A and BLF888B
50 percent efficiency using the BLF888B in a Doherty configuration

YingHao Zhuo, NXP Semiconductors senior regional marketing manager for RF power and base stations in Greater China, said, "With our latest products, NXP is addressing market demand for improved higher drain efficiency, higher output power and improved frequency bandwidth with innovative UHF Broadcast DVB-T solutions."

For more info on these NXP devices visit:
http://www.nxp.com/campaigns/high-performance-rf/index.php?sub=broadcast
and
http://www.nxp.com/products/mosfets/rf_power_transistors_ldmos/broadcast_ism_ldmos/

To learn more on devices for similar applications from Freescale Semiconductor visit
http://www.freescale.com/webapp/sps/site/overview.jsp?nodeId=0106B975203DC3

Also you can find such products at http://www.st.com/internet/analog/product/223919.jsp from ST Microelectronics.