BLF278 查看數據表（PDF） - Philips Electronics
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BLF278 Datasheet PDF : 21 Pages
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Philips Semiconductors
VHF push-pull power MOS transistor
Product Specification
BLF278
COMPONENT
DESCRIPTION
VALUE
DIMENSIONS CATALOGUE NO.
L17, L18
L19, L20
L21, L23
L22
R1
R2, R7
R3, R6
R4, R5
R8, R9
R10
R11
IC1
T1
stripline; note 2
stripline; note 2
stripline; note 2
semi-rigid cable; note 3
43 Ω
43 Ω
50 Ω
50 Ω
metal film resistor
10 turn potentiometer
metal film resistor
metal film resistor
metal film resistor
metal film resistor
metal film resistor
voltage regulator 78L05
1:1 Balun; 7 turns type 4C6 50 Ω
coaxial cable wound around toroid
10 Ω, 0.4 W
50 kΩ
3 × 12.1 Ω in
parallel, 0.4 W
10 Ω; 0.4 W
10 Ω ±5%, 1 W
4 × 10 Ω in
parallel, 1 W
5.11 kΩ, 1 W
length 24.5 mm
width 6 mm
length 66 mm
width 6 mm
length 160 mm
width 4.8 mm
ext. dia. 3.6 mm
outer conductor
length 160 mm
14 × 9 × 5 mm 4322 020 90770
Notes
1. American Technical Ceramics capacitor, type 100B or capacitor of same quality.
2. L1 to L10, L13, L14, L17 to L21 and L23 are striplines on a double copper-clad printed-circuit board, with fibre-glass
PTFE dielectric (εr = 2.2), thickness 1⁄16 inch; thickness of copper sheet 2 × 35 µm.
3. L22 is soldered on to stripline L21.
1996 Oct 21
10
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