MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document by MRF492/D
The RF Line
NPN Silicon
RF Power Transistor
Designed for 12.5 volt low band VHF large±signal power amplifier applications in commercial and industrial FM equipment.
•Specified 12.5 V, 50 MHz Characteristics Ð Output Power = 70 W
Minimum Gain = 11 dB Efficiency = 50%
•Load Mismatch Capability at High Line and RF Overdrive
MAXIMUM RATINGS
Rating |
Symbol |
Value |
Unit |
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Collector±Emitter Voltage |
VCEO |
18 |
Vdc |
Collector±Base Voltage |
VCBO |
36 |
Vdc |
Emitter±Base Voltage |
VEBO |
4.0 |
Vdc |
Collector Current Ð Continuous |
IC |
20 |
Adc |
Total Device Dissipation @ TC = 25°C (1) |
PD |
250 |
Watts |
Derate above 25°C |
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1.43 |
W/°C |
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Storage Temperature Range |
Tstg |
± 65 to +150 |
°C |
THERMAL CHARACTERISTICS
MRF492
70 W, 50 MHz RF POWER TRANSISTOR NPN SILICON
CASE 211±11, STYLE 1
Characteristic |
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Symbol |
Max |
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Unit |
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Thermal Resistance, Junction to Case (2) |
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RθJC |
0.7 |
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°C/W |
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ELECTRICAL CHARACTERISTICS (TC = 25°C unless otherwise noted.) |
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Characteristic |
Symbol |
Min |
Typ |
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Max |
Unit |
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OFF CHARACTERISTICS |
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Collector±Emitter Breakdown Voltage (IC = 100 mAdc, IB = 0) |
V(BR)CEO |
18 |
Ð |
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Ð |
Vdc |
Collector±Emitter Breakdown Voltage (IC = 50 mAdc, VBE = 0) |
V(BR)CES |
36 |
Ð |
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Ð |
Vdc |
Emitter±Base Breakdown Voltage (IE = 10 mAdc, IC = 0) |
V(BR)EBO |
4.0 |
Ð |
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Ð |
Vdc |
Collector Cutoff Current (VCE = 13.6 Vdc, VBE = 0) |
ICES |
Ð |
Ð |
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20 |
mAdc |
ON CHARACTERISTICS |
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DC Current Gain (IC = 5.0 Adc, VCE = 5.0 Vdc) |
hFE |
10 |
Ð |
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150 |
Ð |
DYNAMIC CHARACTERISTICS |
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Output Capacitance (VCB = 15 Vdc, IE = 0, f = 1.0 MHz) |
Cob |
Ð |
275 |
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450 |
pF |
FUNCTIONAL TESTS |
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Common±Emitter Amplifier Power Gain |
GPE |
11 |
13 |
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Ð |
dB |
(VCC = 12.5 Vdc, Pout = 70 W, f = 50 MHz) |
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Collector Efficiency |
η |
50 |
Ð |
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Ð |
% |
(VCC = 12.5 Vdc, Pout = 70 W, f = 50 MHz) |
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NOTES: |
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1.These devices are designed for RF operation. The total device dissipation rating applies only when the devices are operated as RF amplifiers.
2.Thermal Resistance is determined under specified RF operating conditions by infrared measurement techniques.
Motorola, Inc. 1994
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+12.5 Vdc |
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+ |
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C6 |
C7 |
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RFC2 |
± |
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L2 |
L3 |
C8 |
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RF |
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OUTPUT |
C1 |
L1 |
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RF |
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DUT |
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INPUT |
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RFC1 |
C3 |
C4 |
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C2 |
C5 |
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BEAD |
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C1, C8 Ð 9.0± 180 pF, Arco 463 |
RFC2 Ð 12 Turns, #16 AWG, Enameled Wire Closewound |
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C2, C3, C4 Ð 80± 480 pF, Arco 466 |
RFC2 Ð on a 2.0 W Carbon Resistor |
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C5 Ð 1000 pF, 350 V, Unelco |
L1 Ð 2 Turns, #18 AWG Enameled Wire, 0.4 ″ ID, 0.15″ Long |
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C6 Ð 10 mF, 25 Vdc |
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L2 Ð Loop, #12 AWG Wire, 0.6 ″ |
High, 0.4″ Wide |
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C7 Ð 0.01 mF, Ceramic |
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L3 Ð 2 Turns, #12 AWG Wire, ID 0.4 ″ , 0.25″ |
Long |
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RFC1 Ð 10 mH Molded Choke |
Bead Ð Ferrite Bead Ferroxcube #56±590±65/3B |
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Figure 1. 50 MHz Test Circuit
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100 |
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(WATTS) |
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VCC = 12.5 V |
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80 |
f = 50 MHz |
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POWER |
60 |
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, OUTPUT |
40 |
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out |
20 |
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P |
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0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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0 |
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Pin, INPUT POWER (WATTS)
Figure 2. Output Power versus Input Power
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20 |
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VCC = 12.5 V |
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(dB) |
18 |
Pout = 70 W |
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POWER GAIN |
16 |
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14 |
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, |
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PE |
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G |
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12 |
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10 |
25 |
30 |
35 |
40 |
45 |
50 |
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20 |
f, FREQUENCY (MHz)
Figure 3. Power Gain versus Frequency
MRF492 |
MOTOROLA RF DEVICE DATA |
2 |
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140 |
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f = 50 MHz |
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(WATTS) |
120 |
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100 |
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Pin = 8 W |
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POWER |
80 |
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4 W |
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, OUTPUT |
60 |
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2 W |
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40 |
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out |
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P |
20 |
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0 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
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7 |
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VCC, SUPPLY VOLTAGE (VOLTS) |
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Figure 4. Output Power versus Supply Voltage
0
± j1.0
± j2.0
50
Zin 1.0
30
f = 25 MHz
Zo = 10 Ω
2.0
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1.0 |
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0 |
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2.0 |
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50 |
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VCC = 12.5 V, Pout = 70 W |
30 |
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1.0 |
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3.0 |
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f |
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Zin |
ZOL* |
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f = 25 MHz |
ZOL* |
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MHz |
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Ohms |
Ohms |
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2.0 |
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25 |
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1.12 ± j1.28 |
0.85 ± j1.46 |
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30 |
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0.93 ± j1.24 |
0.76 ± j1.3 |
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3.0 |
50 |
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0.7 ± j1.17 |
0.58 ± j1.0 |
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Zo = 10 Ω |
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ZOL* = Conjugate of the optimum load |
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4.0 |
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ZOL* = impedance into which the device |
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ZOL* = output operates at a given output |
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5.0 |
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ZOL* = power, voltage and frequency. |
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Figure 5. Series Equivalent Input/Output Impedances
MOTOROLA RF DEVICE DATA |
MRF492 |
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3 |
PACKAGE DIMENSIONS
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A |
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NOTES: |
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U |
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1. DIMENSIONING AND TOLERANCING PER ANSI |
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M |
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Y14.5M, 1982. |
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2. CONTROLLING DIMENSION: INCH. |
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1 |
M |
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INCHES |
MILLIMETERS |
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Q |
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4 |
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DIM |
MIN |
MAX |
MIN |
MAX |
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A |
0.960 |
0.990 |
24.39 |
25.14 |
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R |
B |
B |
0.465 |
0.510 |
11.82 |
12.95 |
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C |
0.229 |
0.275 |
5.82 |
6.98 |
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D |
0.216 |
0.235 |
5.49 |
5.96 |
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E |
0.084 |
0.110 |
2.14 |
2.79 |
2 |
3 |
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H |
0.144 |
0.178 |
3.66 |
4.52 |
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J |
0.003 |
0.007 |
0.08 |
0.17 |
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D |
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K |
0.435 |
±±± |
11.05 |
±±± |
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M |
45 |
NOM |
45 |
NOM |
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K |
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Q |
0.115 |
0.130 |
2.93 |
3.30 |
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R |
0.246 |
0.255 |
6.25 |
6.47 |
J |
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U |
0.720 |
0.730 |
18.29 |
18.54 |
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C |
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STYLE 1: |
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H |
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PIN 1. |
EMITTER |
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E |
SEATING |
2. |
BASE |
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3. |
EMITTER |
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PLANE |
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4. |
COLLECTOR |
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CASE 211±11
ISSUE N
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. ªTypicalº parameters can and do vary in different applications. All operating parameters, including ªTypicalsº must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and 
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
How to reach us: |
|
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◊ |
MRF492/D |
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*MRF492/D* |