Body Control Module (BCM)

The Body Control Module (BCM) is a central electronic unit that manages various non-critical vehicle functions such as lighting, door locks, seats, and windows control. Electronic components ensure stable power delivery, filter electrical noise, and manage voltage levels, thereby enhancing the reliability and functionality of the BCM.

How Electronic Components Are Used

The diagram illustrates the integration of various electronic components within a vehicle's Body Control Module (BCM). It shows a central unit managing power, connectivity, and control functions. Key areas include Input Protection & Filter, Connectivity (CAN Bus, LIN Bus, FlexRay Bus, Ethernet, 4G/5G Wireless), Power Management, Load Drive, Control Unit, Sensor, and Lighting Control. Components are categorized by their role and connection points.

Key functional blocks and their typical components:

• Input Protection & Filter: Components like fuses (A, C, F, H, K) and filters are used here.
• Connectivity: Manages wired communication (CAN Bus, LIN Bus, FlexRay Bus, Ethernet) and wireless communication (4G/5G, Antenna, RF modem, eSIM). Components include CAN/LIN Transceivers, Ethernet PHY.
• Power Management: Manages stable power delivery.
• Load Drive: Controls actuators and motors (e.g., Wiper, Front mirror, Door locks, Window motors, Power seats).
• Control Unit: Houses the main processing logic.
• Sensor: Receives input from various sensors.
• Lighting Control: Manages vehicle lighting.
• RTC (Real-Time Clock): For timekeeping functions.

Components are further categorized by their role: Circuit Protection, Magnetics, Timing Devices, Sensors, and Capacitors.

Component Overview Table

Recommended Products

• 0603FA Fast-acting SMD fuse

  • 1.6 mm x 0.8 mm surface mount
  • Up to 50 Vdc voltage
  • Interrupting rating: 35 A / 50 A
  • Current range: 0.25 A - 5 A
  • AEC-Q200 qualified

• AMLV Multilayer varistor ESD protection

  • Up to 1200 A peak current
  • Up to 56 V working voltage
  • AEC-Q200 qualified

• SM8T High power TVS diode automotive rated

  • 8000 W peak pulse capability
  • Uni and Bi-polar
  • Low profile DO-218AB package
  • AEC-Q101 qualified

• 0402ESDA-AEC1 Polymer ESD suppressor

  • 0402 (1005 metric) package
  • Ultra-low capacitance (0.05 pF)
  • Single-line, bi-directional device
  • Very fast response time
  • AEC-Q200 qualified

• HCM1A High current molded inductor

  • Popular SMT sizes: 5 mm, 7 mm, 10 mm, 13 mm, 17 mm
  • Inductance range: 0.10 μH to 100 μH, rated up to 100 A, low DCR
  • AEC-Q200, -55 °C to +155 °C

• SDCXA Semi-shielded inductor

  • 4 mm, 5 mm, 6 mm, 8 mm SMT sizes
  • Inductance range: 1.0 μH to 100 μH, current range up to 13.5 A, low DCR
  • AEC-Q200, -55 °C to +125 °C

• DRA Shielded inductor

  • 12.5 mm (4.5, 6, and 8 mm height) mm and 7.6 mm (3.55 and 4.35 mm height) SMT packaging
  • Inductance range: 0.28 μH to 1000 μH, rated up to 56 A
  • AEC-Q200, +165 °C maximum operating temperature

• MPIA Low profile molded inductor

  • EIA / Metric sizes: (0806/2016), (1008/2520), and 42 mm
  • Inductance range: 0.10 μH to 22 μH, rated up to 22 A, low DCR
  • AEC-Q200, -55 °C to +125 °C

• MFBA Ferrite chip bead

  • EIA / Metric sizes: (0402/1005), (0603/1608), (0805/2012), (1206/3126)
  • High impedance up to 2000 Ω, high current up to 6 A
  • AEC-Q200, -55 °C to +150 °C (High temperature rating)

• MCLA Multilayer chip inductor

  • Standard EIA 0402 to 3216 size
  • High Q, higher current ratings
  • Inductance range: 1.0 nH to 12 μH
  • AECQ Grade 3 qualified

• CMLA Automotive common mode choke

  • Three most popular SMT sizes: 7 mm, 9 mm, 12 mm
  • 700 Ω impedance, rated up to 8 A
  • AEC-Q200, -40 °C to +125 °C

• ACE CAN-Ethernet inductor

  • EIA/Metric sizes: (0805/2012), (1210/3225), (1812/4532)
  • Inductance range: 11 μH to 200 μH
  • AEC-Q200 qualified, OPEN Alliance 2.0 (ACE2V), -40 °C to +125 °C

• Conductive polymer hybrid aluminum electrolytic capacitor

  • Capacitance range: 10 μF - 820 μF
  • Voltage range: 16 Vdc - 80 Vdc
  • High reliability, high endurance, high ripple current, low ESR and long life
  • Temperature range: -55°C to +125°C
  • AEC-Q200 option available

• KR / KW Coin cell supercapacitor

  • 11 - 21 mm diameter, height down to 6.5 mm
  • Operating voltage up to 5.5 V, 0.1 F - 1.5 F capacity
  • KR: -25 °C to 85 °C; KW: -40 °C to 85 °C

• CSSA / CSKA Current sense resistor

  • 1216 (3138 metric) to 5930 (15076 metric) package
  • Resistance value from 0.2 mΩ to 5 mΩ
  • High power ratings, up to 15 W
  • AEC-Q200 qualified

• E3XA 3225 Quartz crystal resonator

  • 1210 (3225 metric) package
  • Frequency range 12 MHz to 48 MHz
  • Operating temperature: -40 °C to +125 °C
  • AEC-Q200 qualified