ST DB-2933-54 User Manual
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General feature
■ Excellent thermal stability
■ Frequency: 1.6 - 54MHz
■ Supply voltage: 48V
■ Output power: 400W typ.
■ Input power 10W max.
■ Efficiency: 57% - 76%
■ IMD at 300WPEP < -26dBc
■ Load mismatch: 3:1all phases
DB-2933-54
RF POWER amplifier using 2 x SD2933
N-Channel enhancement-mode lateral MOSFETs
Description
The DB-2933-54 is a RF broadband power
amplifier intended for linear or nonlinear operation
over the band 1.6 to 54 MHz using 2x SD2933
gold metallized N-channel MOS field-effect
transistors. The temperature compensating
biasing circuit supports class B and class AB
operation.
DB-2933-54 is designed in cooperation with
Specific RF Devices.
(e-mail : specific.rf.devices@t-online.de)
Order Code
■ DB-2933-54
October 2006 Rev 1 1/13
www.st.com
13
Contents DB-2933-54
Contents
1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Photos of DB-2933-54 amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 DB-2933-54 class of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 SD2933 mounting recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.1 Mounting recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.2 Mounting sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2/13
DB-2933-54 Electrical data
1 Electrical data
1.1 Maximum ratings
Table 1. Absolute maximum ratings
Symbol Parameter Value Unit
P
IN
P
OUT
(1)
V
DD
V
GG
I
DD
P
DISS
1. VGG from 9 to 15V and PIN < 16W
Input power 16 W
Output power 500 W
Drain supply voltage 50 V
Gate biasing voltage 15 V
Drain current 20 A
Power dissipation 400 W
3/13
Electrical characteristics DB-2933-54
2 Electrical characteristics
TA = +25 oC, VDD = 48V, I
= 2 x 900mA
DQ
Table 2. Electrical Specification
Symbol Test Conditions Min Typ Max Unit
Freq Frequency range 1.6 54 MHz
P
OUT
Gain P
ND P
H2 2
H3 3
VSWR Load mismatch all phases @ P
PIN = 10W 300 400 W
= 10W 16.2 ± 0.6dB dB
IN
= 10W 57 - 76 %
IN
ND
Harmonic @ P
RD
Harmonic @ P
= 300W -26 / -49 dBc
OUT
= 300W -13 / -58 dBc
OUT
= 300W 3:1
OUT
4/13
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