Ericsson PTB20157 Datasheet

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Description

PTB 20157

20 Watts, 1.35–1.85 GHz

RF Power Transistor

The 20157 is an NPN common base RF power transistor intended
for 22–26 Vdc class C operation from 1.35 to 1.85 GHz. Rated at 20
watts minimum output power, it may be used for both CW and PEP
applications. Ion implantation, nitride surface passivation and gold
metallization are used to ensure excellent device reliability . 100% lot
traceability is standard.

Typical Output Pow er vs. Input Pow er

30

25

20

15

10

5

Output Power (Watts)

0

01234567

Input Power (Watts)

VCC = 22 V
f = 1.85 GHz

Maximum Ratings

 20 Watts, 1.35–1.85 GHz
 Class C Characteristics
 40% Min Collector Efficiency at 20 Watts
 Gold Metallization
 Silicon Nitride Passivated

20157

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 0.43 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 Vdc
6 Adc

75 Watts

–40 to +150 °C

2.33 °C/W

PTB 20157

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Electrical Characteristics (100% Tested)

Characteristic Conditions Symbol Min Typ Max Units

Breakdown Voltage C to E IC = 50 mA, RBE = 27 Ω V
Breakdown Voltage C to E VBE = 0 V, IC = 50 mA V
Breakdown Voltage E to B IC = 0 A, IE = 5 mA V
DC Current Gain VCE = 5 V, IC = 500 mA h

(BR)CER
(BR)CES
(BR)EBO

FE

50 — — Volts
50 — — Volts

4 5 — Volts

20 50 120 —

RF Specifications (100% Tested)

Characteristic Symbol Min Typ Max Units

Gain

(V

Collector Efficiency

(V

Load Mismatch Tolerance

(V
—all phase angles at frequency of test)

= 22 Vdc, P

CC

= 22 Vdc, P

CC

= 22 Vdc, P

CC

= 20 W, f = 1.85 GHz) G

out

= 20 W, f = 1.85 GHz) η

out

= 20 W, f = 1.85 GHz Ψ — — 10:1 —

out

pe

C

67—dB

40 43 — %

Impedance Data (data shown for fixed-tuned broadband circuit)

(V

= 22 Vdc, P

CC

= 20 W)

out

Z Source Z Load

Frequency Z Source Z Load

GHz R jX R jX

1.350 8.2 -15.0 9.3 -15

1.400 7.7 -13.0 8.8 -15

1.450 7.4 -12.0 8.3 -14

1.500 7.3 -11.0 7.9 -14

1.550 7.2 -10.0 7.5 -13

1.600 7.3 -9.2 7.2 -13

1.650 7.4 -8.6 6.9 -13

1.700 7.6 -8.1 6.6 -12

1.750 7.9 -7.8 6.4 -12

1.800 8.1 -7.6 6.2 -11

1.850 8.4 -7.5 6.1 -11
2