Ericsson PTB20237 Datasheet

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Description

PTB 20237

150 Watts, 470–860 MHz

UHF TV Power Transistor

The 20237 is a class AB, NPN, common emitter UHF TV power
transistor intended for 28 Vdc operation from 470 to 860 MHz. Rated
at 150 watts minimum output power, it may be used for both CW and
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

200
175
150
125
100

75
50

Output Power (Watts)

25

0

0 4 812162024

Input Power (Watts)

VCC = 28 V
I

= 0.800 A Total

CQ

f = 860 MHz

Maximum Ratings

 470–860 MHz, 28 Volts
 Class AB Characteristics
 50% Collector Efficiency at 150 Watts
 Gold Metallization
 Silicon Nitride Passivated

20237

LOT CODE

Package 20236

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 1.89 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

55 Vdc
60 Vdc

4 Vdc

25 Adc

330 Watts

–40 to +150 °C

0.53 °C/W

PTB 20237

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Electrical Characteristics (100% Tested)

Characteristic Conditions Symbol Min Typ Max Units

Breakdown Voltage C to E IC = 0 A, IB = 100 A V
Breakdown Voltage E to B IC = 0 A, IE = 5 mA V
DC Current Gain VCE = 5 V, IC = 1 mA h

(BR)CEO
(BR)EBO

FE

28 30 — Volts

3.5 5 — Volts
20 50 100 —

RF Specifications (100% Tested)

Characteristic Symbol Min Typ Max Units

Gain

(V
f = 470, 860 MHz)

Collector Efficiency

(V
f = 470, 860 MHz)

Intermodulation Distortion

(V
f1 = 855.25 MHz, Vision = -8 dB, f2 = 859.75 MHz,
Subcarrier = -16 dB, f3 = 860.75 MHz, Sound = -10 dB)

Load Mismatch Tolerance

(V
f1 = 860.0 MHz, f2 = 860.1—all phase angles at frequency of test)

= 28 Vdc, P

CC

= 28 Vdc, P

CC

= 28 Vdc, ICQ = 800 mA Total, P

CC

= 28 Vdc, P

CC

= 150 W, ICQ = 800 mA Total, G

OUT

= 150 W, ICQ = 800 mA Total, η

OUT

= 150 W(PEP), ICQ = 800 mA Total, Ψ — — 3:1 —

OUT

pe

C

= 100 W(PEP), IMD — –44 — dBc

OUT

89—dB

50 — — %

Typical Performance

Gain vs. Frequency

(as measured in a broadband circuit)

11

10

9

Gain (dB)

8

7

470 520 570 620 670 720 770 820 870

Frequency (MHz)

VCC = 28 V
I

= 0.800 A Total

CQ

Pout = 150 W

5/6/98

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