A 150-W power driver transistor for Mode-S avionics transmitters, the MDS150 from Microsemi Corporation is designed to complement the company's MDS Series of high power transistors for Mode-S avionics applications. Taken together, Mode-S series devices (MDS150, MDS400, MDS800 and MDS1100) provide avionics designers with a total transmitter solution.
The MDS150 provides 150 W of output power at 1030/1090 MHz with Mode-S pulsing (0.5 µs on/off x128 burst). This Class C biased, bipolar transistor runs on V(cc) of 50 V making it easy to use with existing power supplies running on 50 to 52 V. The die utilizes gold metallization and integral emitter ballast resistors for maximum reliability. A datasheet is available.