ARF440 Datasheet, PDF (2/4 Pages) Advanced Power Technology – N-CHANNEL ENHANCEMENT MODE RF POWER MOSFET

DYNAMIC CHARACTERISTICS
Symbol Characteristic
C_iss
C_oss
C_rss
Input Capacitance
Output Capacitance
Reverse Transfer Capacitance
Test Conditions
V_GS = 0V
V_DS = 50V
f = 1 MHz
ARF440/441
MIN TYP MAX UNIT
755 900
155 215 pF
55
90
FUNCTIONAL CHARACTERISTICS
Symbol Characteristic
G_{PS Common Source Amplifier Power Gain}
η
Drain Efficiency
ψ
Electrical Ruggedness VSWR 30:1
Test Conditions
V_DD = 50V
P_out = 125W
I_DQ = 200mA
f = 13.56MHz
MIN TYP MAX UNIT
18
21
dB
63
%
No Degradation in Output Power
1 _{Pulse Test: Pulse width < 380 µS, Duty Cycle < 2%}
APT Reserves the right to change, without notice, the specifications and information contained herein.
RF
Input
+Vbias
TYPICAL 13.56 MHz, 250 WATT PUSH-PULL POWER AMPLIFIER CIRCUIT
Q1
0.5µH
T1
L1
2:1
C1
75-480pF
R1 ^3.3K
R3
3.3K
Q2
R2
C2
3.3K
.1µF
BFC1
C3
.1µF
ATC"B"
.01µF
C5
0.4µH
T2
L2
C4
RF
Output
C6
.01µF
ATC"B"
25-240pF
T3
RFC1
ATC"B"
.01µF
C7
C8
.01µF
ATC"B"
C9 C10
C11
+
V_DD = 50V
I_dq = 0.4A
.01µF .1µF 10µF (50V)
Parts List
C1 = 75-480pF Compression Mica
C2, C3 & C10 = .1µF @ 50V, Novacap #1210B104K500N
C4 = 25-240pF Compression Mica
C5, C6, C7, C8 & C9 = .01µF @ 50V, Novacap #1210B103K500N
C11 = 10µF @ 50V Electrolytic
R1, R2 & R3 = 1KΩ, 5%, 1/4W, Carbon
Q1 = ARF440
Q2 = ARF441
L1 = 7.5 T of #18AWG, ID = .438", L = 0.5µH
L2 = 6.5 T of #18AWG, ID = .438", L = 0.4µH
BFC1 = Balanced DC Feed Choke; 7 T of #18 stranded PTFE twisted pair on an Indiana General #F624-19-Q1 toroid. µi = 125
RFC1 = 2 T of #18 stranded PTFE on a Fair-Rite #2677006301 shield bead. µi = 2000
T1 = 4:1 Z Conventional Transformer; 2:1 T of #22 stranded PTFE on a Fair-Rite #2843000202 Balun Core. µi = 850
T2 & 3 = 1:4 Z Transmission Line Transformer; 6 T of mini 25Ω PTFE coax on a Fair-Rite #2643102002 shield bead. µi = 2000
PCB = .062" G10 Epoxy Glass.