BLF278 View Datasheet(PDF) - Philips Electronics
Part Name
Description
MFG CO.
BLF278 Datasheet PDF : 21 Pages
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Philips Semiconductors
VHF push-pull power MOS transistor
Product Specification
BLF278
COMPONENT
L14, L17
L15, L16
DESCRIPTION
VALUE
2 × grade 3B Ferroxcube
wideband HF chokes in parallel
13⁄4 turns enamelled 2 mm copper
wire
40 nH
L18, L19
stripline; note 2
43 Ω
L20, L21
stripline; note 2
43 Ω
R1
R2, R7
R3, R6
R4, R5
R8, R9
R10
R11
IC1
metal film resistor
10 turns potentiometer
metal film resistor
metal film resistor
metal film resistor
metal film resistor
metal film resistor
voltage regulator 78L05
10 Ω, 0.4 W
50 kΩ
1 kΩ, 0.4 W
2 × 5.62 Ω, in
parallel, 0.4 W
10 Ω ±5%, 1 W
4 × 42.2 Ω in
parallel, 1 W
5.11 kΩ, 1 W
DIMENSIONS CATALOGUE NO.
4312 020 36642
int. dia. 10 mm
leads 2 × 7 mm
space 1 mm
length 13 mm
width 6 mm
length 29.5 mm
width 6 mm
Notes
1. American Technical Ceramics capacitor, type 100B or other capacitor of the same quality.
2. L1, L3 to L13, L18 to L22 and L24 are microstriplines on a double copper-clad printed-circuit board, with fibre-glass
reinforced PTFE dielectric (εr = 2.2), thickness 1⁄16 inch; thickness of copper sheet 2 × 35 µm.
3. L2 and L23 are soldered on to striplines L1 and L24 respectively.
1996 Oct 21
17
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