Datasheet MRF1946A, MRF1946 Datasheet (Motorola)

1

MRF1946 MRF1946AMOTOROLA RF DEVICE DATA

The RF Line

 
 

. . . designed for 12.5 volt large–signal power amplifiers in commercial and
industrial equipment.

• High Common Emitter Power Gain

• Specified 12.5 V, 175 MHz Performance

Output Power = 30 Watts
Power Gain = 10 dB
Efficiency = 60%

• Diffused Emitter Resistor Ballasting

• Characterized to 220 MHz

• Load Mismatch at High Line and Overdrive Conditions

MAXIMUM RATINGS

Rating Symbol Value Unit

Collector–Emitter Voltage V

CEO

16 Vdc

Collector–Base Voltage V

CBO

36 Vdc

Emitter–Base Voltage V

EBO

4.0 Vdc

Collector Current — Continuous I

C

8.0 Adc

Total Device Dissipation @ TA = 25°C

Derate above 25°C

P

D

100

0.57

Watts

W/°C

Storage Temperature Range T

stg

–65 to +150 °C

Junction Temperature T

J

200 °C

THERMAL CHARACTERISTICS

Characteristic Symbol Max Unit

Thermal Resistance, Junction to Case R

θJC

1.75 °C/W

ELECTRICAL CHARACTERISTICS (T

C

= 25°C unless otherwise noted.)

Characteristic

Symbol Min Typ Max Unit

OFF CHARACTERISTICS

Collector–Emitter Breakdown Voltage

(IC = 25 mAdc, IB = 0)

V

(BR)CEO

16 — — Vdc

Collector–Emitter Breakdown Voltage

(IC = 25 mAdc, VBE = 0)

V

(BR)CES

36 — — Vdc

Emitter–Base Breakdown Voltage

(IE = 5.0 mAdc, IC = 0)

V

(BR)EBO

4.0 — — Vdc

Collector Cutoff Current

(VCE = 15 Vdc, VBE = 0, TC = 25°C)

I

CES

— — 5.0 mAdc

ON CHARACTERISTICS

DC Current Gain

(IC = 1.0 Adc, VCE = 5.0 Vdc)

h

FE

40 75 150 —

(continued)

Order this document

by MRF1946/D



SEMICONDUCTOR TECHNICAL DATA





30 W, 136–220 MHz

RF POWER

TRANSISTORS

NPN SILICON

CASE 211–07, STYLE 1

MRF1946

CASE 145A–09, STYLE 1

MRF1946A

 Motorola, Inc. 1994

REV 6

MRF1946 MRF1946A
2

MOTOROLA RF DEVICE DATA

ELECTRICAL CHARACTERISTICS — continued (T

C

= 25°C unless otherwise noted.)

Characteristic

Symbol Min Typ Max Unit

DYNAMIC CHARACTERISTICS

Output Capacitance

(VCB = 15 Vdc, IE = 0, f = 1.0 MHz)

C

ob

— 75 100 pF

FUNCTIONAL TESTS

Common–Emitter Amplifier Power Gain

(VCC = 12.5 Vdc, P

out

= 30 W, f = 175 MHz)

G

pe

10 11 — dB

Collector Efficiency

(VCC = 12.5 Vdc, P

out

= 30 W, f = 175 MHz)

η 60 70 — %

Load Mismatch

(VCC = 15.5 Vdc, Pin = 2.0 dB Overdrive,
Load VSWR = 30:1)

ψ

No Degradation in Power Output

Figure 1. Broadband Test Circuit Schematic

C1 — 56 pF Mini–Unelco, 3HS0006–56
C2 — 47 pF Mini–Unelco, 3HS0006–47
C3, C4 — 180 pF Chip Cap, ATC 100B181JC500
C5 — 150 pF Unelco, J101–150
C6 — 39 pF Mini–Unelco, 3HS0006–39
C7, C8 — 1000 pF Chip Cap, ATC 100B102JC50
C9 — 0.1 µF Ceramic Capacitor
C10 — 10 µF, 25 V Electrolytic Capacitor
C11 — 56 pF Mini–Unelco, 3HS0006–56

L1 — 2 Turns #18 AWG, 0.125″ ID
L2, L3 — Circuit Board and Mounting Pad Inductance
L4 — 3 Turns #18 AWG, 0.125″ ID
L5 — 6 Turns #16 Enameled, 0.250″ ID

RFC1 — 0.15 µH Molded Choke w/Ferrite Bead
RFC2 — Ferrite Choke, Fair Rite VK200–4B

Board Material — 1/32, Glass Teflon, 1 oz. Cu Plating
Bead — Ferroxcube

RFC1

DUT

+12.5

Vdc

C1

C10

B

L1 L2

C2 C3

C4

RFC2L5

L3 L4

C6

C7

C5C11

C8 C9

+

3

MRF1946 MRF1946AMOTOROLA RF DEVICE DATA

Figure 2. Output Power versus Input Power Figure 3. Output Power versus Frequency

Figure 4. Output Power versus Supply Voltage Figure 5. Output Power versus Supply Voltage

Figure 6. Output Power versus Supply Voltage Figure 7. Output Power versus Supply Voltage

P , OUTPUT POWER (WATTS)

out

P , OUTPUT POWER (WATTS)

out

P , OUTPUT POWER (WATTS)

out

P , OUTPUT POWER (WATTS)

out

P , OUTPUT POWER (WATTS)

out

P , OUTPUT POWER (WATTS)

out

60

Pin, INPUT POWER (WATTS)

0

48

36

24

12

0

1 2 3 4 5

50

230210190170150130

f, FREQUENCY (MHz)

40

30

20

10

0

50

40

30

20

10

5

VCC, SUPPLY VOLTAGE (VOLTS)

6 7 8 9 10 11 12 13 14 15

50

40

30

20

10

5

VCC, SUPPLY VOLTAGE (VOLTS)

6 7 8 9 10 11 12 13 14 15

50

40

30

20

10

5

VCC, SUPPLY VOLTAGE (VOLTS)

6 7 8 9 10 11 12 13 14 15

50

40

30

20

10

5

VCC, SUPPLY VOLTAGE (VOLTS)

6 7 8 9 10 11 12 13 14 15

VCC = 12.5 V

f = 136 MHz

150 MHz

175 MHz

220 MHz

3 W
2 W

1 W

VCC = 12.5 V

Pin = 4 W

Pin = 4 W

3 W

2 W

1 W

Pin = 4 W

3 W

2 W

1 W

Pin = 4 W

3 W

2 W

1 W

Pin = 4 W

3 W

2 W

1 W

f = 220 MHz f = 175 MHz

f = 150 MHz

f = 136 MHz

MRF1946 MRF1946A
4

MOTOROLA RF DEVICE DATA

Figure 8. Typical Performance in a Broadband Circuit

G

pe

, POWER GAIN (dB)

170

f, FREQUENCY (MHz)

155 160 165 175

100

12

80

60

20

c

η

, COLLECTOR EFFICIENCY

G

pe

η

c

INPUT VSWR

Pin = 3 W
VCC = 12.5 V

150

40

10

8

6

4

2.0:1

1.5:1

1.1:1

Figure 9. Series Equivalent Input and

Output Impedance

Z

in

f = 136 MHz

220

150

ZOL*

f = 136 MHz

175

175

220

150

Zo = 10

Ω

f

MHz

Z

in

Ohms

ZOL*

Ohms

136
150
175
220

0.60 – j0.48

0.63 – j0.26

0.62 + j0.13

0.73 + j0.57

2.22 – j0.74

2.30 – j0.40

2.35 – j0.04

2.20 + j0.43

ZOL* = Conjugate of the optimum load impedance

ZOL* = into which the device output operates at a
ZOL* = given output power, voltage and frequency.

VCC = 12.5 Vdc, P

out

= 30 W

5

MRF1946 MRF1946AMOTOROLA RF DEVICE DATA

PACKAGE DIMENSIONS

CASE 211–07

ISSUE N

MRF1946

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

A

U

M

M

Q

R

B

1

4

32

D

K

E

SEATING
PLANE

C

J

H

S

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A 0.960 0.990 24.39 25.14
B 0.370 0.390 9.40 9.90
C 0.229 0.281 5.82 7.13
D 0.215 0.235 5.47 5.96
E 0.085 0.105 2.16 2.66
H 0.150 0.108 3.81 4.57
J 0.004 0.006 0.11 0.15
K 0.395 0.405 10.04 10.28
M 40 50 40 50
Q 0.113 0.130 2.88 3.30
R 0.245 0.255 6.23 6.47
S 0.790 0.810 20.07 20.57
U 0.720 0.730 18.29 18.54

_ _ _ _

STYLE 1:

PIN 1. EMITTER

2. BASE

3. EMITTER

4. COLLECTOR

CASE 145A–09

ISSUE M

MRF1946A

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

STYLE 1:

PIN 1. EMITTER

2. BASE

3. EMITTER

4. COLLECTOR

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A 0.370 0.385 9.40 9.78
B 0.320 0.330 8.13 8.38
C 0.670 0.790 17.02 20.07
D 0.215 0.235 5.46 5.97
E 0.070 ––– 1.78 –––
J 0.003 0.007 0.08 0.18
K 0.490 ––– 12.45 –––
L 0.055 0.070 1.40 1.78
M 45 NOM 45 NOM
P ––– 0.050 ––– 1.27
R 0.299 0.307 7.59 7.80
S 0.158 0.178 4.01 4.52
T 0.083 0.100 2.11 2.54
U 0.098 0.132 2.49 3.35

_ _

SEATING
PLANE

S

J

U

K

D

L

A

R

M

3

1

42

B

E

P

T

8–32UNC–2A

WRENCH FLAT

C

MRF1946 MRF1946A
6

MOTOROLA RF DEVICE DATA

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MRF1946/D

*MRF1946/D*

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