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MOTOROLA
The RF Line
SEMICONDUCTOR TECHNICAL DATA
Order this document by MRF492/D
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 -- Output Power = 70 W Minimum Gain = 11 dB Efficiency = 50% * Load Mismatch Capability at High Line and RF Overdrive
MRF492
70 W, 50 MHz RF POWER TRANSISTOR NPN SILICON
MAXIMUM RATINGS
Rating Collector-Emitter Voltage Collector-Base Voltage Emitter-Base Voltage Collector Current -- Continuous Total Device Dissipation @ TC = 25C (1) Derate above 25C Storage Temperature Range Symbol VCEO VCBO VEBO IC PD Tstg Value 18 36 4.0 20 250 1.43 - 65 to +150 Unit Vdc Vdc Vdc Adc Watts W/C C CASE 211-11, STYLE 1
THERMAL CHARACTERISTICS
Characteristic Thermal Resistance, Junction to Case (2) Symbol RJC Max 0.7 Unit C/W
ELECTRICAL CHARACTERISTICS (TC = 25C unless otherwise noted.)
Characteristic Symbol Min Typ Max Unit
OFF CHARACTERISTICS
Collector-Emitter Breakdown Voltage (IC = 100 mAdc, IB = 0) Collector-Emitter Breakdown Voltage (IC = 50 mAdc, VBE = 0) Emitter-Base Breakdown Voltage (IE = 10 mAdc, IC = 0) Collector Cutoff Current (VCE = 13.6 Vdc, VBE = 0) V(BR)CEO V(BR)CES V(BR)EBO ICES 18 36 4.0 -- -- -- -- -- -- -- -- 20 Vdc Vdc Vdc mAdc
ON CHARACTERISTICS
DC Current Gain (IC = 5.0 Adc, VCE = 5.0 Vdc) hFE 10 -- 150 --
DYNAMIC CHARACTERISTICS
Output Capacitance (VCB = 15 Vdc, IE = 0, f = 1.0 MHz) Cob -- 275 450 pF
FUNCTIONAL TESTS
Common-Emitter Amplifier Power Gain (VCC = 12.5 Vdc, Pout = 70 W, f = 50 MHz) Collector Efficiency (VCC = 12.5 Vdc, Pout = 70 W, f = 50 MHz) GPE 11 50 13 -- -- -- dB %
NOTES: 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.
(c)MOTOROLA RF DEVICE DATA Motorola, Inc. 1994
MRF492 1
+12.5 Vdc + C6 RFC2 L2 C1 L1 DUT RFC1 C2 C5 BEAD C3 C4 L3 C8 - C7
RF OUTPUT
RF INPUT
C1, C8 -- 9.0 - 180 pF, Arco 463 C2, C3, C4 -- 80 - 480 pF, Arco 466 C5 -- 1000 pF, 350 V, Unelco C6 -- 10 F, 25 Vdc C7 -- 0.01 F, Ceramic RFC1 -- 10 H Molded Choke
RFC2 -- 12 Turns, #16 AWG, Enameled Wire Closewound RFC2 -- on a 2.0 W Carbon Resistor L1 -- 2 Turns, #18 AWG Enameled Wire, 0.4 ID, 0.15 Long L2 -- Loop, #12 AWG Wire, 0.6 High, 0.4 Wide L3 -- 2 Turns, #12 AWG Wire, ID 0.4, 0.25 Long Bead -- Ferrite Bead Ferroxcube #56-590-65/3B
Figure 1. 50 MHz Test Circuit
100 Pout , OUTPUT POWER (WATTS) VCC = 12.5 V f = 50 MHz G PE , POWER GAIN (dB)
20 VCC = 12.5 V Pout = 70 W
80
18
60
16
40
14
20
12
0
0
1
2
3
4
5
6
7
8
9
10
10
20
25
30
35
40
45
50
Pin, INPUT POWER (WATTS)
f, FREQUENCY (MHz)
Figure 2. Output Power versus Input Power
Figure 3. Power Gain versus Frequency
MRF492 2
MOTOROLA RF DEVICE DATA
140 f = 50 MHz Pout , OUTPUT POWER (WATTS) 120 100 80 60 40 20 0 7 8 9 10 11 12 13 14 15 16 17 Pin = 8 W 4W 2W
VCC, SUPPLY VOLTAGE (VOLTS)
Figure 4. Output Power versus Supply Voltage
1.0 2.0 - j1.0 - j2.0 0
0
50 30
1.0
VCC = 12.5 V, Pout = 70 W f MHz Zin Ohms 1.12 - j1.28 0.93 - j1.24 0.7 - j1.17 ZOL* Ohms 0.85 - j1.46 0.76 - j1.3 0.58 - j1.0
3.0
f = 25 MHz
ZOL*
2.0
50 Zin 30 f = 25 MHz Zo = 10
2.0 1.0
25 30 50
Zo = 10
3.0 4.0 5.0
ZOL* = Conjugate of the optimum load ZOL* = impedance into which the device ZOL* = output operates at a given output ZOL* = power, voltage and frequency.
Figure 5. Series Equivalent Input/Output Impedances
MOTOROLA RF DEVICE DATA
MRF492 3
PACKAGE DIMENSIONS
A U M
1
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH.
Q
M
4
R
B
2
3
D K J H C E
SEATING PLANE
DIM A B C D E H J K M Q R U STYLE 1: PIN 1. 2. 3. 4.
INCHES MIN MAX 0.960 0.990 0.465 0.510 0.229 0.275 0.216 0.235 0.084 0.110 0.144 0.178 0.003 0.007 0.435 --- 45 _NOM 0.115 0.130 0.246 0.255 0.720 0.730
MILLIMETERS MIN MAX 24.39 25.14 11.82 12.95 5.82 6.98 5.49 5.96 2.14 2.79 3.66 4.52 0.08 0.17 11.05 --- 45 _NOM 2.93 3.30 6.25 6.47 18.29 18.54
EMITTER BASE EMITTER COLLECTOR
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. "Typical" parameters can and do vary in different applications. All operating parameters, including "Typicals" 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: USA / EUROPE: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. 1-800-441-2447 MFAX: RMFAX0@email.sps.mot.com - TOUCHTONE (602) 244-6609 INTERNET: http://Design-NET.com
JAPAN: Nippon Motorola Ltd.; Tatsumi-SPD-JLDC, Toshikatsu Otsuki, 6F Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 03-3521-8315 HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298
MRF492 4
*MRF492/D*
MRF492/D MOTOROLA RF DEVICE DATA

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