Ericsson PTB20148 Datasheet

e

Description

PTB 20148

60 Watts, 925–960 MHz

Cellular Radio RF Power Transistor

The 20148 is a class AB, NPN, common emitter RF power transistor
intended for 25 Vdc operation from 925 to 960 MHz. Rated at 60
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.

Gain vs. Frequency

(as measured in a broadband circuit)

12

VCC = 25 V

11

10

Gain (dB)

I

= 200 mA

CQ

Pout = 60 W

9

8

920 925 930 935 940 945 950 955 960 965

Frequency (MHz)

Maximum Ratings

 60 Watts, 925–960 MHz
 Class AB Characteristics
 50% Min Collector Efficiency at 60 Watts
 Gold Metallization
 Silicon Nitride Passivated

20148

LOT CODE

Package 20200

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 0.83 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

40 Vdc
65 Vdc

4.0 Vdc

8.0 Adc

145 Watts

–40 to +150 °C

1.2 °C/W

PTB 20148

5

e

Electrical Characteristics (100% Tested)

Characteristic Conditions Symbol Min Typ Max Units

Breakdown Voltage C to E IB = 0 A, IC = 50 mA 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 = 250 mA h

(BR)CEO
(BR)CES
(BR)EBO

FE

25 30 — Volts
55 70 — Volts

3.5 5.0 — Volts
20 50 120 —

RF Specifications (100% Tested)

Characteristic Symbol Min Typ Max Units

Gain

(V

Collector Efficiency

(V

Load Mismatch Tolerance

(V
f = 960 MHz—all phase angles at frequency of test)

= 25 Vdc, P

CC

= 25 Vdc, P

CC

= 25 Vdc, P

CC

= 60 W, ICQ = 200 mA, f = 960 MHz) G

out

= 60 W, ICQ = 200 mA, f = 960 MHz) η

out

= 60 W, ICQ = 200 mA, Ψ — — 10:1 —

out

pe

C

8.0 9.5 — dB

50 — — %

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

(V

= 25 Vdc, P

CC

= 60 W, ICQ = 200 mA)

out

Z Source Z Load

Frequency Z Source Z Load

MHz R jX R jX

925 3.4 -4.2 3.8 0.6
940 3.2 -4.7 3.5 1.2
960 3.0 -5.5 3.3 2.0

2

/19/98