2003 Sep 19 16
Philips Semiconductors Product Specification
VHF push-pull power MOS transistor BLF278
List of components (see Figs 21 and 22).
COMPONENT DESCRIPTION VALUE DIMENSIONS CATALOGUE NO.
C1, C2 multilayer ceramic chip capacitor;
note 1
27 pF, 500 V
C3, C4, C31, C32 multilayer ceramic chip capacitor;
note 1
3 × 18 pF
in parallel, 500 V
C5 film dielectric trimmer 4 to 40 pF 2222 809 08002
C6, C30 film dielectric trimmer 2 to 18 pF 2222 809 09006
C7 multilayer ceramic chip capacitor;
note 1
100 pF, 500 V
C8, C9, C15, C18 MKT film capacitor 1 µF, 63 V 2222 371 11105
C10, C13, C14,
C19, C36
multilayer ceramic chip capacitor 100 nF, 50 V 2222 852 47104
C11, C12 multilayer ceramic chip capacitor;
note 1
2 × 1 nF in parallel,
500 V
C16, C17 electrolytic capacitor 220 µF, 63 V
C20 multilayer ceramic chip capacitor;
note 1
3 × 33 pF in
parallel, 500 V
C21 film dielectric trimmer 2 to 9 pF 2222 809 09005
C22, C27, C37,
C38
multilayer ceramic chip capacitor;
note 1
1 nF, 500 V
C23, C26, C35 electrolytic capacitor 10 µF, 63 V
C24, C25 multilayer ceramic chip capacitor;
note 1
2 × 470 pF in
parallel, 500 V
C28 multilayer ceramic chip capacitor;
note 1
2 × 10 pF +
1 × 18 pF in
parallel, 500 V
C29 multilayer ceramic chip capacitor;
note 1
2 × 5.6 pF in
parallel, 500 V
C33, C34 multilayer ceramic chip capacitor;
note 1
5.6 pF, 500 V
L1, L3, L22, L24 stripline; note 2 50 Ω length 80 mm
width 4.8 mm
L2, L23 semi-rigid cable; note 3 50 Ω ext. dia. 3.6 mm
outer conductor
length 80 mm
L4, L5 stripline; note 2 43 Ω length 24 mm
width 6 mm
L6, L7 stripline; note 2 43 Ω length 14.5 mm
width 6 mm
L8, L9 stripline; note 2 43 Ω length 4.4 mm
width 6 mm
L10, L11 stripline; note 2 43 Ω length 3.2 mm
width 6 mm
L12, L13 stripline; note 2 43 Ω length 15 mm
width 6 mm
