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SD4931
RF power transistors HF/VHF/UHF N-channel MOSFETs
Features

Improved ruggedness V(BR)DSS > 200 V Excellent thermal stability 20:1 all phases load mismatch capability POUT = 150 W min. with 14.8 dB gain @ 175 MHz In compliance with the 2002/95/EC european directive
M174 Epoxy sealed
Description
The SD4931 is a N-channel MOS field-effect RF power transistor. It is intended for use in 50 V DC large signal applications up to 250 MHz.
Figure 1.
Pin connection 4 1
3 1. Drain 2. Source
2 3. Gate 4. Source
January 2010
Doc ID 15486 Rev 2
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www.st.com 9
Electrical data
SD4931
1
1.1
Electrical data
Maximum ratings
Table 2.
Symbol V(BR)DSS VDGR VGS ID PDISS TJ TSTG
Absolute maximum ratings (TCASE = 25C)
Parameter Drain source voltage Drain-gate voltage (RGS = 1 M) Gate-source voltage Drain current Power dissipation Max. operating junction temperature Storage temperature Value 200 200 20 20 389 200 -65 to +150 Unit V V V A W C C
1.2
Thermal data
Table 3.
Symbol RthJC
Thermal data
Parameter Junction - case thermal resistance Value 0.45 Unit C/W
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SD4931
Electrical characteristics
2
Electrical characteristics
TCASE = +25 C
2.1
Static
Table 4.
Symbol V(BR)DSS IDSS IGSS VTH VDS(ON) GFS CISS COSS CRSS VGS = 0 V VGS = 0 V VGS = 20 V ID = 250 V VGS = 10 V VDS = 10 V VGS = 0 V VGS = 0 V VGS = 0 V ID = 10 A ID = 2.5 A VDS = 50 V VDS = 50 V VDS = 50 V f = 1 MHz f = 1 MHz f = 1 MHz 2.5
Static
Test conditions IDS = 100 mA VDS = 100 V VDS = 0 V 1.5 2.5 3.5 4.0 500 200 8 Min 200 1 250 4.0 5.0 Typ Max Unit V mA nA V V S pF pF pF
2.2
Dynamic
Table 5.
Symbol P1dB GPS nD VDD = 50 V
Dynamic
Test conditions IDQ = 250 mA f = 175 MHz Min 150 13 50 10:1 Typ 175 14.8 56 20:1 Max Unit W dB % VSWR
VDD = 50 V IDQ = 250 mA POUT = 150 W f = 175 MHz VDD = 50 V IDQ = 250 mA POUT = 150 W f = 175 MHz
VDD = 50 V IDQ = 250 mA POUT = 150 W f = 175 MHz Load mismatch All phase angles
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Typical performance
SD4931
3
Typical performance
Figure 2. Power gain and efficiency vs output power_Vdd = 50 V, Idq = 250 mA Freq = 175 MHz
Table 6.
Vgs sort (@250 mA)
Marking DD EE FF A B C D E F G H I J K L M N O P Min. 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 Max. 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
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SD4931 Table 6. Vgs sort (@250 mA) (continued)
Marking Q R S T U V Min. 3.4 3.5 3.6 3.7 3.8 3.9
Typical performance
Max. 3.5 3.6 3.7 3.8 3.9 4
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Package mechanical data
SD4931
4
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK(R) specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark. Table 7.
Dim. Min A B C D E F G H I J K L M 25.53 3.05 24.64 12.57 0.08 2.11 3.81 6.22 18.28 3.18 24.89 12.83 0.18 3.00 4.45 7.11 26.67 3.30 1.005 0.120 0.970 0.495 0.003 0.083 0.150 5.56 3.18 6.48 18.54 0.245 0.720 0.125 0.980 0.505 0.007 0.118 0.175 0.280 1.050 0.130 Typ Max 5.584 Min 0.219 0.125 0.255 0.730 Typ Max 0.230
M174 (0.500 DIA 4/L N/HERM W/FLG) mechanical data
mm. Inch
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SD4931 Figure 3. Package dimensions
Package mechanical data
Controlling Dimension: Inches
1011000D
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Revision history
SD4931
5
Revision history
Table 8.
Date 17-Mar-2008 14-Jan-2010
Document revision history
Revision 1 2 Initial release. Updated test conditions in Table 5: Dynamic. Changes
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SD4931
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