September 1992

8

Philips Semiconductors

Product specification

UHF power MOS transistor

BLF522

List of components (class-B test circuit)

Notes

1. American Technical Ceramics (ATC) capacitor, type 100B or other capacitor of the same quality.

2. American Technical Ceramics (ATC) capacitor, type 100A or other capacitor of the same quality.

3. The striplines are on a double copper-clad printed circuit board, with PTFE fibre-glass dielectric (

thickness 0.79 mm.

COMPONENT

DESCRIPTION

VALUE

DIMENSIONS

CATALOGUE NO.

C1, C8, C20

multilayer ceramic chip capacitor

(note 1)

430 pF, 50 V

C2

multilayer ceramic chip capacitor

(note 2)

3.9 pF, 50 V

C3, C5, C18, C19

film dielectric trimmer

2 to 18 pF

2222 809 09003

C4

multilayer ceramic chip capacitor

(note 2)

20 pF, 50 V

C6, C7, C15, C16,

C17

multilayer ceramic chip capacitor

(note 2)

10 pF, 50 V

C9, C10, C11, C13

multilayer ceramic chip capacitor

100 nF, 50 V

2222 852 47104

C12

multilayer ceramic chip capacitor

(note 1)

390 pF, 50 V

C14

electrolytic capacitor

10

µF, 63 V

2222 030 38109

L1

stripline (note 3)

50

Ω

36.6

× 2.5 mm

L2

stripline (note 3)

50

Ω

16.7

× 2.5 mm

L3

stripline (note 3)

50

Ω

7.7

× 2.5 mm

L4, L5

stripline (note 3)

42

Ω

3

× 3 mm

L6

4 turns enamelled 0.8 mm copper

wire

24.9 nH

length 6.9 mm

int. dia. 2.5 mm

leads 2

× 5 mm

L7

grade 3B Ferroxcube RF choke

4312 020 36642

L8

stripline (note 3)

50

Ω

10

× 2.5 mm

L9

stripline (note 3)

50

Ω

16.5

× 2.5 mm

L10

stripline (note 3)

50

Ω

34.5

× 2.5 mm

R1

0.4 W metal film resistor

10 k

Ω

2322 151 51003

R2

0.4 W metal film resistor

1 k

Ω

2322 151 51002

R3

10 turns cermet potentiometer

50 k

Ω

R4

0.4 W metal film resistor

47 k

Ω

2322 151 54703

R5

1 W metal film resistor

10

Ω

2322 153 51009