ST TDR004V1 User Manual
RF power amplifier demonstration board using two
SD2933 N-channel enhancement-mode lateral MOSFETs
Features
■ Excellent thermal stability
■ Frequency: 1.6 - 54 MHz
■ Supply voltage: 48 V
■ Output power: 400 W (typ.)
■ Input power 10 W max.
■ Efficiency: 57 % - 76 %
■ IMD at 300 WPEP < -26 dBc
■ Load mismatch: 3:1 (all phases)
Description
The STEVAL-TDR004V1 demonstration board is
an RF broadband power amplifier intended for
linear or nonlinear operation over the 1.6 to 54
MHz band, using two SD2933 gold metallized Nchannel MOS field-effect transistors. The
temperature compensating biasing circuit
supports class B and class AB operation.
STEVAL-TDR004V1 is designed in cooperation
with Specific RF Devices (Germany).
STEVAL-TDR004V1
Table 1. Device summary
Order code
STEVAL-TDR004V1
March 2010 Doc ID 17341 Rev 1 1/12
www.st.com
12
Contents STEVAL-TDR004V1
Contents
1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 STEVAL-TDR004V1 amplifier photos . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 STEVAL-TDR004V1 class of operation . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 SD2933 mounting recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.1 Mounting recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.2 Mounting sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2/12 Doc ID 17341 Rev 1
STEVAL-TDR004V1 Electrical data
1 Electrical data
1.1 Maximum ratings
Table 2. 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 15 V and PIN < 16 W
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
Doc ID 17341 Rev 1 3/12
Electrical characteristics STEVAL-TDR004V1
2 Electrical characteristics
TA = +25 ºC, VDD = 48 V, I
= 2 x 900 mA
DQ
Table 3. 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 = 10 W 300 400 W
= 10 W 16.2 ± 0.6dB dB
IN
= 10 W 57 - 76 %
IN
ND
Harmonic @ P
RD
Harmonic @ P
= 300 W -26 / -49 dBc
OUT
= 300 W -13 / -58 dBc
OUT
= 300 W 3:1
OUT
4/12 Doc ID 17341 Rev 1
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