SD2931-12 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

SD2931-12

RF power transistor: HF/VHF/UHF N-channel power MOSFETs

STMicroelectronics 

Test circuit @ 30 MHz

9

Test circuit @ 30 MHz

SD2931-10

Figure 24. 30 MHz test circuit schematic (engineering test circuit)

Figure 25. 30 MHz test circuit part list

Symbol

Description

T1

9:1 transformer, 25 Ω flexible coax with extra shield .090 OD 15” long

T2

1:4 transformer, 50 Ω flexible coax .225 OD 15” long

FB1

Toroid 1.7” OD .30” ID 220 μ 4 turns

FB2

Surface mount EMI shield bead

FB3

Toroid 1.7” OD .300” ID 220μ 3 turns

RFC1

Toroid 0.5” OD 0.30” ID 125μ 4 turns 12 awg wire

PCB

0.62” woven fiberglass, 1 oz. Copper, 2 Sides, εr = 2.55

R1, R3

1 KΩ 1 W chip resistor

R2

680 Ω 3 W wirewound resistor

C1,C4,C6,C7,C8,

C9, C11,C12,C13

0.1 μF ATC chip cap

C2, C3

C5

C10

C14

750 pF ATC chip cap

470 pF ATC chip cap

10 μF 63 V electrolytic capacitor

100 μF 63 V electrolytic capacitor

14/19

DocID7076 Rev 10

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