blw81 NXP Semiconductors, blw81 Datasheet - Page 8

• Manufacturer Part Number: blw81
• Description: Uhf Power Transistor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
March 1993
handbook, halfpage
handbook, halfpage
VSWR = 1
UHF power transistor
P Lnom
(W)
(W)
P L
30
20
10
15
13
11
0
9
0
1
f = 470 MHz
typical values
1.1
Fig.11
Fig.9
2.5
T h = 25 C
1.2
70 C
P S (W)
VSWR =
2.25
5
10
50
V CC = 12.5 V
V CC = 13.5 V
V CCnom
P Snom
V CC
P S
MGP580
MGP582
1.3
5
8
Measuring conditions for R.F. SOAR
f = 470 MHz
T
R
V
P
circuit of Fig.7.
The transistor has been developed for use with
unstabilized supply voltages. As the output power and
drive power increase with the supply voltage, the nominal
output power must be derated in accordance with the
graph for safe operation at supply voltages other than the
nominal. The graph shows the permissible output power
under nominal conditions (VSWR = 1), as a function of the
expected supply over-voltage ratio, with VSWR as
parameter.
The graph applies to the situation in which the drive
(P
ratio.
handbook, halfpage
h
CCnom
S
th mb-h
S
= 70 C
= P
/P
(dB)
Snom
G p
Snom
10
= 12,5 V or 13,5 V
= 0,6 K/W
5
0
0
) increases linearly with supply over-voltage
at V
CCnom
f = 470 MHz
T h = 25 C
typical values
10
and VSWR = 1 measured in the
Fig.10
20
G p
Product specification
V CC = 12.5 V
V CC = 13.5 V
P L (W)
MGP581
BLW81
30
100
50
0
(%)