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D G S
TO-247
ARF448A ARF448B
Common Source
RF POWER MOSFETs
N - CHANNEL ENHANCEMENT MODE 150V 250W 65MHz
The ARF448A and ARF448B comprise a symmetric pair of common source RF power transistors designed for pushpull scientific, commercial, medical and industrial RF power amplifier applications up to 65 MHz.
* Specified 150 Volt, 40.68 MHz Characteristics: * Output Power = 250 Watts. * Gain = 15dB (Class C) * Efficiency = 75%
MAXIMUM RATINGS
Symbol VDSS VDGO ID VGS PD RJC TJ,TSTG TL Parameter Drain-Source Voltage Drain-Gate Voltage Continuous Drain Current @ TC = 25C Gate-Source Voltage Total Power Dissipation @ TC = 25C Junction to Case
* Low Cost Common Source RF Package. * Very High Breakdown for Improved Ruggedness. * Low Thermal Resistance. * Nitride Passivated Die for Improved Reliability.
All Ratings: TC = 25C unless otherwise specified.
ARF448A/448B UNIT Volts
450 450 15 30 230 0.55 -55 to 150 300
Amps Volts Watts C/W C
Operating and Storage Junction Temperature Range Lead Temperature: 0.063" from Case for 10 Sec.
STATIC ELECTRICAL CHARACTERISTICS
Symbol BVDSS Characteristic / Test Conditions Drain-Source Breakdown Voltage (VGS = 0V, ID = 250 A)
1
MIN
TYP
MAX
UNIT Volts
450 3 25 250 100 5 2 8.5 5
nA mhos Volts A
VDS(ON) On State Drain Voltage IDSS IGSS gfs VGS(TH)
(ID(ON) = 7.5A, VGS = 10V)
Zero Gate Voltage Drain Current (VDS = VDSS, VGS = 0V) Zero Gate Voltage Drain Current (VDS = 0.8 VDSS, VGS = 0V, TC = 125C) Gate-Source Leakage Current (VGS = 30V, VDS = 0V) Forward Transconductance (VDS = 25V, ID = 7.5A) Gate Threshold Voltage (VDS = VGS, ID = 50mA)
CAUTION: These Devices are Sensitive to Electrostatic Discharge. Proper Handling Procedures Should Be Followed.
APT Website - http://www.advancedpower.com
USA
405 S.W. Columbia Street Bend, Oregon 97702-1035 F-33700 Merignac - France Phone: (541) 382-8028 Phone: (33) 5 57 92 15 15 FAX: (541) 388-0364 FAX: (33) 5 56 47 97 61
EUROPE
Avenue J.F. Kennedy Bat B4 Parc Cadera Nord
050-4908 Rev B
DYNAMIC CHARACTERISTICS
Symbol Ciss Coss Crss td(on) tr td(off) tf Characteristic Input Capacitance Output Capacitance Reverse Transfer Capacitance Turn-on Delay Time Rise Time Turn-off Delay Time Fall Time Test Conditions VGS = 0V VDS = 150V f = 1 MHz VGS = 15V VDD = 0.5 VDSS ID = ID[Cont.] @ 25C RG = 1.6 MIN TYP
ARF448A/448B
MAX UNIT
1400 150 65 7 5 23 12
1700 200 100 15 10 40 25
ns pF
FUNCTIONAL CHARACTERISTICS
Symbol GPS Characteristic Common Source Amplifier Power Gain Drain Efficiency Electrical Ruggedness VSWR 20:1 Test Conditions f = 40.68 MHz VGS = 0V VDD = 150V MIN TYP MAX UNIT dB %
13 70
15 75
Pout = 250W
No Degradation in Output Power
1 Pulse Test: Pulse width < 380 S, Duty Cycle < 2% APT Reserves the right to change, without notice, the specifications and information contained herein.
30 25 20 GAIN (dB) 15 Class C VDD = 150V Pout = 250W CAPACITANCE (pf)
3000 Ciss 1000 500
Coss
10 5 0 10
Crss
100
30 40 50 60 65 FREQUENCY (MHz) Figure 1, Typical Gain vs Frequency
20
1 5 10 50 150 VDS, DRAIN-TO-SOURCE VOLTAGE (VOLTS) Figure 2, Typical Capacitance vs. Drain-to-Source Voltage
50
25 ID, DRAIN CURRENT (AMPERES)
TJ = -55C
VDS> ID (ON) x RDS (ON)MAX. 250SEC. PULSE TEST @ <0.5 % DUTY CYCLE
70 ID, DRAIN CURRENT (AMPERES)
OPERATION HERE LIMITED BY RDS (ON)
10S 100S
20
10 5
1mS
15
10mS 1 .5 TC =+25C TJ =+150C SINGLE PULSE .1 1 5 10 50 100 500 VDS, DRAIN-TO-SOURCE VOLTAGE (VOLTS) Figure 4, Typical Maximum Safe Operating Area 100mS DC
10
5
050-4908 Rev B
TJ = +125C
TJ = -55C
TJ = +25C 0 0 2 4 6 8 VGS, GATE-TO-SOURCE VOLTAGE (VOLTS) Figure 3, Typical Transfer Characteristics
ARF448A/448B
1.2 1.1 1.0 0.9 0.8 ID, DRAIN CURRENT (AMPERES) VGS(th), THRESHOLD VOLTAGE (NORMALIZED) 40 VGS=8, 10 & 15V
30 6.5V 20 6V 5.5V 10 5V 4.5V 0
0.7 0.6 -50 -25 0 25 50 75 100 125 150 TC, CASE TEMPERATURE (C) Figure 5, Typical Threshold Voltage vs Temperature 300 Class C VDD = 150V
1 5 10 15 20 25 30 VDS, DRAIN-TO-SOURCE VOLTAGE (VOLTS) Figure 6, Typical Output Characteristics
GPS, COMMON SOURCE AMPLIFIER GAIN (dB)
17 Class C VDD = 150V 16 f = 40.68 MHz
POUT, POWER OUT (WATTS)
240
f = 40.68 MHz
180
15
120
14
60
0 0
4 6 8 10 PIN, POWER IN (WATTS) Figure 7, Typical Power Out vs Power In
2
60 120 180 240 300 POUT, POWER OUT (WATTS) Figure 8, Typical Common Source Amplifier Gain vs Power Out
13
0
0.6 D=0.5 , THERMAL IMPEDANCE (C/W) 0.2 0.1 0.05 0.05 0.02 0.01 0.005 0.01 SINGLE PULSE Note:
PDM t1 t2 Duty Factor D = t1/t2 Peak TJ = PDM x ZJC + TC
0.1
Z 0.001 10-5
JC
10-3 10-2 10-1 1.0 RECTANGULAR PULSE DURATION (SECONDS) Figure 9, Typical Maximum Effective Transient Thermal Impedance, Junction-To-Case vs Pulse Duration
10-4
10
Table 1 - Typical Class C Large Signal Input-Output Impedance Freq. (MHz) 2.0 13.5 27.0 40.0 65.0 Z in () 20.90 - j 9.2 2.40 - j 6.8 0.57 - j 2.6 0.31 - j 0.5 0.44 + j 1.9 Z OL () 56.00 - j 06.0 37.00 - j 26.0 18.00 - j 25.0 9.90 - j 19.2 4.35 - j 11.4
Z in - gate shunted by 25 Z OL - conjugate of optimum load impedance for 250W at 150V
050-4908 Rev B
ARF448A/448B
40.68 MHz Test Circuit
Parts List
C1 -- 1800pF 100V chip C2-C4 -- Arco 463 Mica Trimmer C5-C7 -- 1nF 500V COG chip L1 -- 1" #16 AWG into hairpin ~9.6nH L2 -- 6t #16 AWG .25" ID ~165nH L3 -- 10t #18 AWG .25" ID ~0.47H L4 -- VK200-4B ferrite choke ~3uH R1 -- 25 Ohm 1/2W Carbon T1 -- 9:1 Broadband Transformer
L4 + C6 L3 L2 C5 C4 RF Output C7 150V
RF Input T1 C1 C2
L1
DUT
C3
R1
40.48 MHz Test Circuit
TO-247 Package Outline
Top View 15.49 (.610) 16.26 (.640) 5.38 (.212) 6.20 (.244)
4.69 (.185) 5.31 (.209) 1.49 (.059) 2.49 (.098) 6.15 (.242) BSC 20.80 (.819) 21.46 (.845)
Dimensions in Millimeters and (Inches) NOTE: The ARF446 and ARF447 comprise a symmetric pair of RF power transistors and meet the same electrical specifications. The device pin-outs are the mirror image of each other to allow ease of use as a push-pull pair.
Source
3.55 (.138) 3.81 (.150)
4.50 (.177) Max. 0.40 (.016) 0.79 (.031)
2.87 (.113) 3.12 (.123) 1.65 (.065) 2.13 (.084)
19.81 (.780) 20.32 (.800) 1.01 (.040) 1.40 (.055)
Device ARF448A ARF448B Gate Drain Source Source Drain Gate
2.21 (.087) 2.59 (.102)
5.45 (.215) BSC 2-Plcs.
050-4908 Rev B
USA
405 S.W. Columbia Street Bend, Oregon 97702-1035 Phone: (541) 382 - 8028 FAX: (541) 388 - 0364
EUROPE
Avenue J.F. Kennedy Bat B4 Parc Cadera Nord F-33700 Merignac - France Phone: (33) 5 57 92 15 15 FAX: (33) 5 56 47 97 61

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