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BD9P105MUF-CE2 Folha de dados(PDF) 47 Page - Rohm

Nome de Peças BD9P105MUF-CE2
Descrição Electrónicos  3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive
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Fabricante Electrônico  ROHM [Rohm]
Página de início  http://www.rohm.com
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© 2019 ROHM Co., Ltd. All rights reserved.
28.Apr.2020 Rev.001
www.rohm.com
TSZ22111 • 15 • 001
BD9P1x5MUF-C Series
TSZ02201-0J1J0AL01500-1-2
Automotive Power Supply Line Circuit
DC/DC Converter
VIN
Battery Line
Reverse Polarity
Protection Diode
TVS
π-type filter
D
C
C
L
Figure 88. Automotive Power Supply Line Circuit
As a reference, the automotive power supply line circuit example is given in figure above.
The π-type filter is a third-order LC filter. In general, it is used in combination with decoupling capacitors for high frequency.
Since large attenuation characteristics can be obtained, excellent characteristic is also obtained as an EMI filter. Devices
used for π-type filters should be placed close to each other.
TVS (Transient Voltage Suppressors) is used for primary protection of the automotive power supply line. Since it is
necessary to withstand high energy of load dump surge, a general zener diode is insufficient. Recommended device is
shown in the following table.
In addition, a reverse polarity protection diode is needed considering if a power supply such as Battery is accidentally
connected in the opposite direction.
Table 12. Reference Parts of Automotive Power Supply Line Circuit
Device
Part name (series)
Manufacturer
Device
Part name (series)
Manufacturer
L
CLF series
TDK
TVS
SMB series
Vishay
L
XAL series
Coilcraft
D
S3A to S3M series
Vishay
C
CJ series / CZ series
NICHICON
Recommended Parts Manufacturer List
Shown below is the list of the recommended parts manufacturers for reference.
Type
Manufacturer
URL
Electrolytic Capacitor
NICHICON
www.nichicon-us.com
Ceramic Capacitor
Murata
www.murata.com
Hybrid Capacitor
Suncon
www.sunelec.co.jp
Inductor
TDK
product.tdk.com
Inductor
Coilcraft
www.coilcraft.com
Inductor
SUMIDA
www.sumida.com
Diode
Vishay
www.vishay.com
Diode/Resistor
ROHM
www.rohm.com


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