Ericsson PTB20079 Datasheet
e
Description
PTB 20079
10 Watts, 1.6–1.7 GHz
INMARSAT RF Power Transistor
The 20079 is a class A/AB, NPN, silicon bipolar junction, internallymatched, common emitter RF Power transistor intended for 26 Vdc
operation across 1.6 to 1.7 GHz frequency band. It is rated at 10
Watts minimum output power for PEP applications. Ion implantation,
nitride surface passivation and gold metallization ensure excellent
device reliability. 100% lot traceability is standard.
Typical Output Pow er vs. Input Power
16
14
12
10
8
6
4
2
Output Power (Watts)
0
0.00 0.50 1.00 1.50 2.00
+26V
+22V
f = 1.65 GHz
ICQ = 100 mA
Input Power (Wa tts)
+24V
Maximum Ratings
10 Watts, 1.6–1.7 GHz
Class A/AB Characteristics
38% Collector Efficiency at 10 Watts
Gold Metallization
Silicon Nitride Passivated
20079
LOT CODE
Package 20209
Parameter Symbol Value Unit
Collector-Emitter Voltage V
Collector-Base Voltage V
Emitter-Base Voltage (collector open) V
Collector Current (continuous) I
Total Device Dissipation at T
Above 25° C derate by 0.29 W/°C
Storage Temperature Range T
Thermal Resistance (T
9/28/98
flange
= 25° C P
flange
= 70° C) R
1
CER
CBO
EBO
C
D
STG
θJC
50 Vdc
50 Vdc
4.0 Vdc
1.4 Adc
52 Watts
–40 to +150 °C
3.4 °C/W
PTB 20079
5
e
Electrical Characteristics (100% Tested)
Characteristic Conditions Symbol Min Typ Max Units
Breakdown Voltage C to E IC = 15 mA, RBE = 22 Ω V
Breakdown Voltage E to B IE = 10 mA V
DC Current Gain IC = 1 A, VCE = 5 V h
(BR)CER
(BR)EBO
FE
55 — — Vdc
4.0 — — Vdc
20 — 100 —
RF Specifications (100% Tested)
Characteristic Symbol Min Typ Max Units
Power Gain, Common-Emitter
(V
Efficiency
(V
Power Output at 1 dB Compression
(V
= 26 Vdc, P
CC
= 26 Vdc, P
CC
= 26 Vdc, ICQ = 120 mA, f = 1.65 GHz) P-1dB 10.0 12 — Watts
CC
= 3 W, ICQ = 120 mA, f = 1.65 GHz) G
OUT
= 10 W, ICQ = 120 mA, f = 1.65 GHz) η
OUT
pe
10.5 11 — dB
C
37 40 — %
Impedance Data (data shown for fixed-tuned broadband circuit)
V
= 26 Vdc, P
CC
= 10 W, ICQ = 120 mA
OUT
Z Source Z Load
Frequency Z Source Z Load
GHz R jX R jX
1.6 3.9 -4.7 6.1 -0.7
1.65 3.1 -3.8 6.1 0.0
1.7 2.3 -3.7 6.1 0.7
2
/6/98
Z0 = 50 Ω
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