SEMICONDUCTOR TECHNICAL DATA Order this document by MRF228/D The RF Line... designed for. volt VHF large signal power amplifiers in commercial and industrial FM equipment. Compact.28 Stud Package Specified. V, 17 MHz Performance Output Power = 1 Watts Power Gain = db Min Efficiency = % Min Characterized to 22 MHz Load Mismatch Capability at High Line and Overdrive 1 W 13 22 MHz RF POWER TRANSISTOR NPN SILICON MAXIMUM RATINGS Rating Symbol Value Unit Collector Emitter Voltage VCEO Vdc Collector Base Voltage VCBO 3 Vdc Emitter Base Voltage VEBO 4. Vdc Collector Current Continuous IC 2. Adc Total Device Dissipation @ TA = 2 C Derate above 2 C PD 4.23 Storage Temperature Range Tstg to +1 C Junction Temperature TJ 2 C THERMAL CHARACTERISTICS Watts W/ C Characteristic Symbol Max Unit Thermal Resistance, Junction to Case RθJC 4. C/W ELECTRICAL CHARACTERISTICS (TC = 2 C unless otherwise noted.) OFF CHARACTERISTICS Collector Emitter Breakdown Voltage (IC = 2 madc, IB = ) Collector Emitter Breakdown Voltage (IC = 2 madc, VBE = ) Emitter Base Breakdown Voltage (IE =. madc, IC = ) Collector Cutoff Current (VCB = 1 Vdc, IE = ) CASE 4 4, STYLE 1 Characteristic Symbol Min Typ Max Unit V(BR)CEO Vdc V(BR)CES 3 Vdc V(BR)EBO 4. Vdc ICBO 1. madc (continued) REV MOTOROLA Motorola, Inc. 1994 RF DEVICE DATA MRF228 1
ELECTRICAL CHARACTERISTICS continued (TC = 2 C unless otherwise noted.) ON CHARACTERISTICS DC Current Gain (IC = madc, VCE =. Vdc) Characteristic Symbol Min Typ Max Unit hfe 1 7 1 DYNAMIC CHARACTERISTICS Output Capacitance (VCB = 1 Vdc, IE =, f = 1. MHz) FUNCTIONAL TESTS (Figure 1) Common Emitter Amplifier Power Gain (VCC =. Vdc, Pout = 1 W, f = 17 MHz) Collector Efficiency (VCC =. Vdc, Pout = 1 W, f = 17 MHz) Cob 33 pf Gpe 13 db η 8 % Load Mismatch (VCC = 1. Vdc, Pin = 2. db Overdrive, Load VSWR = 3:1) ψ No Degradation in Output Power C11 RFC2 + R3 C C13 +. V L7 R2 C1 RFC1 R1 L1 L2 C2 C3 C4 C L3 L4 L L C1 D.U.T. C C7 C8 C9 C1, C1, C11 1 pf Ceramic Chip Capacitor C2 27 pf Mini Unelco Capacitor C3 33 pf Mini Unelco Capacitor C4, C 27 pf Unelco J11 Capacitor C, C9 pf Mini Unelco Capacitor C7 91 pf Mini Unelco Capacitor C8 8 pf Mini Unelco Capacitor C.1 µf Monolythic Capacitor C13 1 µf, 1 V Electrolytic L1 3 Turns # AWG, 3/1 ID L2 1 1/8 # AWG into 1/2 High Loop L3 Copper Pad,.2 x.4 x. L4 1/4 # AWG into 1/8 High Loop L 3 Turns # AWG Enameled, 3/32 ID L Turns # AWG Enameled, 3/32 ID L7 1 3/4 #1 AWG into 3/4 High Loop R1 Ω, 1/2 W Carbon R2 1 Ω, 1. W Carbon R3 1 Ω, 1. W Carbon RFC1.1 µh Molded Choke RFC2 Ferroxcube Choke, VK2 4B Figure 1. Broadband Circuit MRF228 2
VCC =. V.8 W. W.4 W f = 13 MHz VCC =. V 1 MHz 17 MHz 22 MHz 13 1 17 19 f, FREQUENCY (MHz) 21 23.2.4..8 1 1.2 1.4 1. Pin, INPUT POWER (WATTS) Figure 2. Output Power versus Frequency Figure 3. Output Power versus Input Power 3 3.7 W. W.2 W.7 W. W.2 W f = 22 MHz 7 8 9 1 11 13 14 1 f = 17 MHz 7 8 9 1 11 13 14 1 Figure 4. Output Power versus Supply Voltage Figure. Output Power versus Supply Voltage 3 3.7 W. W 7 8 9 1 11 13 14 1.2 W f = 1 MHz.7 W. W.2 W f = 13 MHz 7 8 9 1 11 13 14 1 Figure. Output Power versus Supply Voltage Figure 7. Output Power versus Supply Voltage MRF228 3
1 14 GPE 8 GPE, POWER GAIN (db) 1 8 4 2 1 ηc INPUT VSWR 1:1 4 1 1 1 17 17 f, FREQUENCY (MHz) Pin =.7 W VCC =. V 1.:1 1.2:1 7 η c, COLLECTOR EFFICIENCY Figure 8. Typical Performance in a Broadband Circuit Zin f = 13 MHz 22 1 17 Zo = 1 Ω f = 13 MHz f MHz 13 1 17 22 ZOL* 1 17 22 VCC =. V, Pout = 1 W Zin Ohms.9 j.8.8 j.1.9 j.17.2 + j.39 ZOL* Ohms.7 j4.7.23 j4.14.2 j3.4.2 j2.4 ZOL* = Conjugate of the optimum load impedance ZOL* = into which the device output operates at a ZOL* = given output power, voltage and frequency. Figure 9. Series Equivalent Impedance MRF228 4
PACKAGE DIMENSIONS 3 T F P 8 32 NC 2A WRENCH FLAT 2 4 A 1 D K M J SEATING PLANE U E B S C MILLIMETERS INCHES DIM MIN MAX MIN MAX A 7. 7.2.278.28 B.2..4.2 C 14.99 1.1.9. D.4.9.21.23 E 1.4 1... G 1.2. J.8.17.3.7 K 11..43 M 4 NOM 4 NOM P 1.27. S 3. 3.2.1.8 T 1.4 1.77..7 U 2.92 3.8.11.14 STYLE 1: PIN 1. EMITTER 2. BASE 3. EMITTER 4. COLLECTOR CASE 4 4 ISSUE J MRF228
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