Philips BLF278 - Page 9

2003 Sep 19 9
Philips Semiconductors Product Specification
VHF push-pull power MOS transistor BLF278
List of components (see Figs 12 and 13).
COMPONENT DESCRIPTION VALUE DIMENSIONS CATALOGUE NO.
C1, C2, C33, C34 multilayer ceramic chip capacitor;
note 1
22 pF, 500 V
C3, C4 multilayer ceramic chip capacitor;
note 1
100pF+68pF
in parallel, 500 V
C5, C6, C28 film dielectric trimmer 5 to 60 pF 2222 809 08003
C7 multilayer ceramic chip capacitor;
note 1
2 × 100 pF +
1 × 120 pF in
parallel, 500 V
C8, C11, C12,
C15, C16, C19,
C36
multilayer ceramic chip capacitor 100 nF, 500 V 2222 852 47104
C9, C10, C13,
C14, C20, C25
multilayer ceramic chip capacitor;
note 1
1 nF, 500 V
C17, C18, C22,
C23
multilayer ceramic chip capacitor;
note 1
470 pF, 500 V
C21, C24, C35 electrolytic capacitor 10 µF, 63 V
C26 multilayer ceramic chip capacitor;
note 1
2 × 15 pF +
1 × 18 pF in
parallel, 500 V
C27 multilayer ceramic chip capacitor;
note 1
3 × 15 pF in
parallel, 500 V
C29 multilayer ceramic chip capacitor;
note 1
2 × 18 pF +
1 × 15 pF in
parallel, 500 V
C30 film dielectric trimmer 2 to 18 pF 2222 809 09006
C31, C32 multilayer ceramic chip capacitor;
note 1
3 × 43 pF in
parallel, 500 V
L1, L2 stripline; note 2 43 Ω length 57.5 mm
width 6 mm
L3, L4 stripline; note 2 43 Ω length 29.5 mm
width 6 mm
L5, L6 stripline; note 2 43 Ω length 14 mm
width 6 mm
L7, L8 stripline; note 2 43 Ω length 6 mm
width 6 mm
L9, L10 stripline; note 2 43 Ω length 17.5 mm
width 6 mm
L11, L16 2 × grade 3B Ferroxcube wideband
HF chokes in parallel
4312 020 36642
L12, L15 4 turns enamelled 2 mm copper wire 85 nH length 13.5 mm
int. dia. 10 mm
leads 2 × 7mm
L13, L14 stripline; note 2 43 Ω length 19.5 mm
width 6 mm