Transitores Blf 278
Páginas: 4 (780 palabras)
Publicado: 12 de enero de 2013
Broadcast Concepts Inc 2451 NW 109th Ave Unit 7 Miami FL 33172 USA TEL: 305.513.0941 FAX 305.513.0541; website: http://broadcastconcepts.com
Model BCI-88-108-800 FM Pallet Amplifier Module
Thisamplifier module is ideal for driver and final output stages in analog and digital FM broadcast equipment.
87.5 – 108MHz 43 - 45 Volts Input/output 50 ohms Pout: 800W minimum 25dB Gain (800W) •Thermal Tracking Bias • Highest power density • NXP BLF578 Mosfet
• • • • •
Dimension (L x W x H inch) [4.0” x 1.25” x 1.2”]
Absolute Maximum Ratings (T case = 25C) Symbol Parameter Vs Drainvoltage supply Is Supply Current VSWR Load Mismatch (All phase angles, Id=26A, TC=+55C) Tstg Storage temperature range Tc Base plate operating temperature RF IN RF Input RF OUT RF Output
Value 45 26 3to 1 -40 to +85C -40 to +65C 3.0 850
Unit V DC A dc Celsius Celsius Watts Watts
Electrical Specifications (T case = 25C, 50 ohm loaded, VS=43V bias=50ma) Characteristics min typ max unitOperating Frequency range 87.5 108 MHz Fundamental output power 800 W Power Input 2.5 W Input VSWR -14 dB Power Gain (800w output) 24 25 dB Collector Efficiency 77 79 82 % Collector Current (800w output)23.5 A dc Insertion Phase variation (unit to unit) +/-3.5 degrees Power gain (unit to unit) +/-0.75 dB F2 Second Harmonic -30dB dB F3 Third Harmonic -25dB dB Transistor Bias Current: Factory set to 40 5060 ma dc 35ma @43V. Adjustment is not required
Broadcast Concepts, Inc Revised 10/07/2009
1
Broadcast Concepts Inc 2451 NW 109th Ave Unit 7 Miami FL 33172 USA TEL: 305.513.0941 FAX305.513.0541; website: http://broadcastconcepts.com Amplifier Drawing
Heatsink Mounting/Hardware
Tips for Mechanical Mounting: 1 All holes are clear for #6 Screw. Stainless Steel mounting hardware isrecommended, grade 18-8 or better. A lock washer of same material should also be used. 2 Ensure mounting surface is flat to better than 0.003” / “ 3 Use a thin layer of thermal compound on the backside...
Model BCI-88-108-800 FM Pallet Amplifier Module
Thisamplifier module is ideal for driver and final output stages in analog and digital FM broadcast equipment.
87.5 – 108MHz 43 - 45 Volts Input/output 50 ohms Pout: 800W minimum 25dB Gain (800W) •Thermal Tracking Bias • Highest power density • NXP BLF578 Mosfet
• • • • •
Dimension (L x W x H inch) [4.0” x 1.25” x 1.2”]
Absolute Maximum Ratings (T case = 25C) Symbol Parameter Vs Drainvoltage supply Is Supply Current VSWR Load Mismatch (All phase angles, Id=26A, TC=+55C) Tstg Storage temperature range Tc Base plate operating temperature RF IN RF Input RF OUT RF Output
Value 45 26 3to 1 -40 to +85C -40 to +65C 3.0 850
Unit V DC A dc Celsius Celsius Watts Watts
Electrical Specifications (T case = 25C, 50 ohm loaded, VS=43V bias=50ma) Characteristics min typ max unitOperating Frequency range 87.5 108 MHz Fundamental output power 800 W Power Input 2.5 W Input VSWR -14 dB Power Gain (800w output) 24 25 dB Collector Efficiency 77 79 82 % Collector Current (800w output)23.5 A dc Insertion Phase variation (unit to unit) +/-3.5 degrees Power gain (unit to unit) +/-0.75 dB F2 Second Harmonic -30dB dB F3 Third Harmonic -25dB dB Transistor Bias Current: Factory set to 40 5060 ma dc 35ma @43V. Adjustment is not required
Broadcast Concepts, Inc Revised 10/07/2009
1
Broadcast Concepts Inc 2451 NW 109th Ave Unit 7 Miami FL 33172 USA TEL: 305.513.0941 FAX305.513.0541; website: http://broadcastconcepts.com Amplifier Drawing
Heatsink Mounting/Hardware
Tips for Mechanical Mounting: 1 All holes are clear for #6 Screw. Stainless Steel mounting hardware isrecommended, grade 18-8 or better. A lock washer of same material should also be used. 2 Ensure mounting surface is flat to better than 0.003” / “ 3 Use a thin layer of thermal compound on the backside...
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