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L6732 bảng dữ liệu(PDF) 31 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Adjustable step-down controller with synchronous rectification
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L6732 bảng dữ liệu(HTML) 31 Page - STMicroelectronics

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L6732
L6732 demonstration board
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7.2
5 A board description and PCB layout
L6732 5 A demonstration board realizes in a two layer PCB a step-down DC/DC converter
and shows the operation of the device in a general purpose application. The input voltage
can range from 4.5 V to 14 V and the output voltage is at 3.3 V. The module can deliver an
output current of up to 5 A. The switching frequency is set at 250 kHz (controller free-
running FSW) but it can be set to 500 kHz acting on the EAREF pin. Compared to the 20 A
version, the only difference of this board, compared to the first one, is the presence of a dual
MOSFET chip, for the high-side and low-side MOSFETs; besides R15 has been inserted
between High side MOSFET gate and phase pin; R14 has been inserted between low side
MOSFET gate and Pgnd pin.
Table 10.
Demonstration board part list
Reference
Value
Manufacturer
Package
Supplier
R1
1 k
Ω
Neohm
SMD 0603
IFARCAD
R2
1 k
Ω
Neohm
SMD 0603
IFARCAD
R3
4 K7
R4
2 k7
Neohm
SMD 0603
IFARCAD
R5
0
Ω
Neohm
SMD 0603
IFARCAD
R6
N.C.
Neohm
SMD 0603
IFARCAD
R7
4 k99
Neohm
SMD 0603
IFARCAD
R8
10
Ω
Neohm
SMD 0603
IFARCAD
R9
2 k49
Neohm
SMD 0603
IFARCAD
R10
2.2
Ω
Neohm
SMD 0603
IFARCAD
R11
2.2
Ω
Neohm
SMD 0603
IFARCAD
R12
N.C.
Neohm
SMD 0603
IFARCAD
R13
10 K
Neohm
SMD 0603
IFARCAD
R14
N.C.
Neohm
SMD 0603
IFARCAD
R15
N.C.
Neohm
SMD 0603
IFARCAD
C1
4.7 nF
Kemet
SMD 0603
IFARCAD
C2
47 nF
Kemet
SMD 0603
IFARCAD
C3
1 nF
Kemet
SMD 0603
IFARCAD
C4
100 nF
Kemet
SMD 0603
IFARCAD
C5
100 nF
Kemet
SMD 0603
IFARCAD
C6
N.C.
/
/
/
C7
100 nF
Kemet
SMD 0603
IFARCAD
C8
4.7
µF 20 V
AVX
SMA6032
IFARCAD
C9
1 nF
Kemet
SMD 0603
IFARCAD
C10
1
µF
Kemet
SMD 0603
IFARCAD
C11
220 nF
Kemet
SMD 0603
IFARCAD



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