September 2010 Doc ID 9965 Rev 6 1/14
14
SD3932
RF power transistors
HF/VHF/UHF N-channel MOSFETs
Features
■Excellent thermal stability
■Common source push-pull configuration
■POUT = 350 W min.
with 26.8 dB gain @ 123 MHz
■In compliance with the 2002/95/EC
European directive
Description
The SD3932 is an N-channel MOS field-effect RF
power transistor. It is intended for use in 100V DC
large signal applications up to 250 MHz.
Figure 1. Pin connection
M244
Epoxy sealed
1
2
1
2
33
1. Drain
2. Gate
3. Source
Table 1. Device summary
Order code Marking Package Packaging
SD3932 SD3932 M244 Plastic tray
www.st.com
Contents SD3932
2/14 Doc ID 9965 Rev 6
Contents
1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Static . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Dynamic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Impedance data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Circuit layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SD3932 Electrical data
Doc ID 9965 Rev 6 3/14
1 Electrical data
1.1 Maximum ratings
1.2 Thermal data
Table 2. Absolute maximum ratings (TCASE = 25 °C)
Symbol Parameter Value Unit
V(BR)DSS(1)
1. TJ = 150 °C
Drain source voltage 250 V
VDGR Drain-gate voltage (RGS = 1 MΩ)250V
VGS Gate-source voltage ±20 V
IDDrain current 20 A
PDISS Power dissipation 500 W
TJMax. operating junction temperature 200 °C
TSTG Storage temperature -65 to +150 °C
Table 3. Thermal data
Symbol Parameter Value Unit
RthJC Junction - case thermal resistance 0.35 °C/W
Electrical characteristics SD3932
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2 Electrical characteristics
TCASE = +25 oC
2.1 Static
2.2 Dynamic
Table 4. Static (per side)
Symbol Test conditions Min. Typ. Max. Unit
V(BR)DSS(1)
1. TJ = 150 °C
VGS = 0 V IDS = 100 mA 250 V
IDSS VGS = 0 V VDS = 100 V 1 mA
IGSS VGS = 20 V VDS = 0 V 250 nA
VGS(Q) VDS = 10 V ID = 250 mA 1.5 2.5 4.0 V
VDS(ON) VGS = 10 V ID = 5A 2.5 3.5 V
GFS VDS = 10 V ID = 2.5 A 2.5 S
CISS VGS = 0 V VDS = 100 V f = 1 MHz 500 pF
COSS VGS = 0 V VDS = 100 V f = 1 MHz 134 pF
CRSS VGS = 0 V VDS = 100 V f = 1 MHz 6 pF
Table 5. Dynamic
Symbol Test conditions Min. Typ. Max. Unit
P1dB VDD = 100 V IDQ = 2 x 250 mA f = 123MHz 350 425 W
GPS VDD = 100 V, IDQ = 2 x 250mA, POUT = 350W,f = 123MHz 26.8 dB
hDVDD = 100 V, IDQ = 2 x 250mA, POUT = 350W,f = 123MHz 66 %
Load
mismatch
VDD = 100 V, IDQ = 2 x 250mA, POUT = 300W,f = 123MHz
All phase angles 3:1 VSWR
SD3932 Impedance data
Doc ID 9965 Rev 6 5/14
3 Impedance data
Figure 2. Impedance data
Table 6. Impedance data
Freq ZIN (Ω)Z
DL (Ω)
123 MHz (800 W peak) 1.4 - j 5.5 6.4 + j 10.2
123 MHz (350 W CW) 0.7 - j 3.9 3.2 + j 15
Typica l Dr a in
Load Impedance
Typical Input
Impedance
GZin
ZDL
D
S
Typical performance SD3932
6/14 Doc ID 9965 Rev 6
4 Typical performance
Figure 3. Capacitances vs voltage
Figure 4. Transient thermal impedance
0
100
200
300
400
500
600
700
800
900
1000
0 20 40 60 80 100 120
Vds (V)
Capac i tance s (pF )
Coss Crss Ciss
Freq = 1 MHz
0
0.05
0.1
0.15
0.2
0.25
1.0E-04 1.0E-03 1.0E-02 1.0E-01 1.0E+00
R e ctan gular Pu lse Wid th , S eco nds
Zth , Transient Therm al Im peda nce ,
Deg C/W
Single Pulse
DF = 20 %
DF = 10 %
DF = 50 %
SD3932 Typical performance
Doc ID 9965 Rev 6 7/14
Figure 5. Maximum safe operating area
Figure 6. Zero temperature coefficient point
1
10
100
1 10 100 1000
Vds(V)
Ids(A)
Tc = +25 °C
Tj = +200 °C
SINGLE PULSE
Operation limited
by R ds(on)100 µS
1 mS
10 mS
100 mS
DC
0
1
2
3
4
5
6
7
8
9
10
1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Vgs(V)
Ids(A)
ZTC POINT
+125°C
- 55°C
+ 25°C
Typical performance SD3932
8/14 Doc ID 9965 Rev 6
Figure 7. Pout and efficiency vs pin - CW Figure 8. Gain vs output power - CW
0
50
100
150
200
250
300
350
400
450
500
0.0 0.5 1.0 1.5
Pin (W)
P out (W)
0
10
20
30
40
50
60
70
80
90
100
Nd (% )
Pout Eff
Freq = 123 M Hz
V dd = 100V
Idq = 2 x 250m A 20
21
22
23
24
25
26
27
28
29
30
0 50 100 150 200 250 300 350 400 450 500
Pin (W)
P out (W)
Freq = 123 M Hz
V dd = 100V
Idq = 2 x 250mA
Pout(W)
Gain(dB)
Figure 9. Pout and efficiency vs pin power
1 msec - 10 %
Figure 10. Gain vs output power
1 msec - 10 %
0
100
200
300
400
500
600
700
800
900
1000
0.0 2.0 4.0 6.0 8.0
Pin (W)
Pout (W)
0
10
20
30
40
50
60
70
80
90
100
Nd (%)
Pout Eff
Freq = 123 M Hz
V dd = 100V
Idq = 2 x 250mA 20
21
22
23
24
25
26
27
28
29
30
0 100 200 300 400 500 600 700 800 900
Pin (W)
Pout (W )
Freq = 123 MHz
V dd = 100V
Idq = 2 x 250m A
Pout(W)
Gain(dB)
SD3932 Test circuit
Doc ID 9965 Rev 6 9/14
5 Test circuit
Figure 11. Test circuit
Table 7. Bill of materials
Component Description
C1 120 pF ATC 100B chip capacitor
C2 1-20 pF Johanson variable capacitor
C3 51 pF ATC 100B chip capacitor
C4, C5 750 pF ATC 700B chip capacitor
C6 43 pF ATC 100B chip capacitor
C7 20 pF ATC 100B chip capacitor
C8 1000 pF ATC 100C chip capacitor
C9 43 pF ATC 100B chip capacitor
C10 2200 pF ATC 100C chip capacitor
C11 1200 pF ATC 100C chip capacitor
R1, R2 1 kΩ 1/4 watt chip resistor
R3, R4 1 kΩ 1/2 watt axial lead resistor
L1 3 turns, 16 ga magnet wire, Id 3/8", 95 nH
FB1, FB2 Fair-rite # 2743019447
B1 20 ga teflon coated wire thru copper tube OD 1/8"x 1.3"
T1 20 ga teflon coated wire thru 4 copper tubes OD 1/8"x 1.5"
TL1 0.135" x 0.155" microstrip
TL2, TL3 0.420" x 0.350" microstrip
Circuit layout SD3932
10/14 Doc ID 9965 Rev 6
6 Circuit layout
Component Description
TL4, TL5 0.220" x 0.350" microstrip
TL6, TL7 0.350" x 0.660" microstrip
TL8 0.225" x 0.200" microstrip
TL9 0.175" x 0.250" microstrip
Board 0.062" FR-4
Figure 12. Circuit layout photo
Table 7. Bill of materials (continued)
SD3932 Package mechanical data
Doc ID 9965 Rev 6 11/14
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com. ECOPACK
is an ST trademark.
Package mechanical data SD3932
12/14 Doc ID 9965 Rev 6
Figure 13. Package dimensions
Table 8. M244 (.400 x .860 4/L BAL N/HERM W/FLG) mechanical data
Dim.
mm. Inch
Min Typ Max Min Typ Max
A 5.59 5.84 0.220 0.230
B5.08 0.200
C 3.02 3.28 0.119 0.129
D 9.65 9.91 0.380 0.390
E 19.81 20.82 0.780 0.820
F 10.92 11.18 0.430 0.440
G 27.94 1.100
H 33.91 34.16 1.335 1.345
I 0.10 0.15 0.004 0.006
J 1.52 1.78 0.060 0.070
K 2.59 2.84 0.102 0.112
L 4.83 5.84 0.190 0.230
M 10.03 10.34 0.395 0.407
N 21.59 22.10 0.850 0.870
1020876B
Controlling Dimension: Inches
SD3932 Revision history
Doc ID 9965 Rev 6 13/14
8 Revision history
Table 9. Document revision history
Date Revision Changes
09-Sep-2003 1 First release
03-Jul-2007 2 Specification upgrade
07-Aug-2007 3 Updated: Cover page, Figure 7, 8, 9, 10 on page 8
31-Oct-2007 4
Updated: Table 4: Static (per side) on page 4
Added Section 5: Test circuit on page 9, Section 6: Circuit layout on
page 10
16-Oct-2008 5 Updated: Table 4: Static (per side) on page 4
07-Sep-2010 6 Updated features on cover page.
SD3932
14/14 Doc ID 9965 Rev 6
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