MRF497

The MRF497 is designed for 12.5V VHF large-signal power amplifier applications in commercial and industrial equipment, operating in the 25 to 50 MHz frequency range. The features of MRF497 include: (1)low-cost, common-emitter TD-220AB oackage; (2)specified 12.5V, 50MHz performance: output power=40W, power gain=10dB min, efficiency=60% min; (3)load mismatch capability at rated voltage and RF drive.

The following is about the absolute maximum ratings of MRF497: (1)collector-emitter voltage: 18V; (2)collector-base voltage: 36V; (3)emitter-base voltage: 4.0V; (4)collector current-continuous: 6.0A; (5)total device dissipation @ TC=25: 87.5W; (6)storage temperature range: -65 to 150.

The electrical characteristics of the MRF497 are: (1)collector-emitter breakdown voltage: 18V at IC=100mA, IB=0; (2)collector-emitter breakdown voltage: 36V at IC=20mA, VBE=0; (3)emitter-base breakdown voltage: 4.0V at IE=10mA, IC=0; (4)output capacitance: 250pF max at VCB=15V, IE=0, f=1.0MHz; (5)DC current gain: 20 min at IC=1.0A, VCE=5.0V.