May 1991

6

Philips Semiconductors

Product specification

UHF power transistor

BLT53

APPLICATION INFORMATION

MODE OF

OPERATION

f

(MHz)

(V)

(W)

(dB)

(%)

c.w. class-B

470

7.5

8

> 6

typ. 6.8

> 60

typ. 65

Fig.7

Gain and efficiency as functions of load

power, typical values.

handbook, halfpage

048

Gp

(dB)

Gp

PL (W)

12

10

0

2

MCD197

8

6

4

η

(%)

η

70

20

30

60

50

40

Fig.8

Load power as a function of drive power,

typical values.

handbook, halfpage

0

12

8

4

0

12

PL

(W)

4

MCD198

3

PD (W)

Ruggedness in class-B operation

The BLT53 is capable of withstanding a full load mismatch

corresponding to VSWR = 50:1 through all phases at rated

output power, up to a supply voltage of 9 V, and

f = 470 MHz.