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BD9P1X5EFV-C 데이터시트(PDF) 47 Page - Rohm |
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BD9P1X5EFV-C 데이터시트(HTML) 47 Page - Rohm |
47 / 60 page 47/57 TSZ02201-0J1J0AL01480-1-2 © 2019 ROHM Co., Ltd. All rights reserved. 08.Apr.2020 Rev.002 www.rohm.com TSZ22111 • 15 • 001 BD9P1x5EFV-C Series 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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