4-Channel Li-Ion Battery Cell Controller IC

BMA7004
Preproduction
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The BMA7004 is a Li-ion battery cell controller integrated circuit (IC) designed for 12 V automotive and industrial applications with three to four cells management, synchronized cell-voltage or current measurement with coulomb count, total stack voltage measurement and seven general-purpose input/output (GPIO) or temperature sensor inputs.

Block Diagram

BMA7004

BMA7004 Block Diagram
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Features

Supply Voltage

  • 6 V ≤ VPWR ≤ 30 V operation, 40 V transient

Advanced Voltage and Temperature Measurement

  • 4 Cell Voltage Measurement Channels with integrated averaging possible up to 256 samples
  • Total Stack Voltage Measurement
  • 0.8 mV maximum total voltage measurement error
  • 7 analog-to-digital converter (ADC), GPIO and Temperature Sensor Inputs

Synchronized Advanced Current Measurement

  • IC sensor with programmable gain amplifier (PGA)
  • ±0.5% accuracy from milliamps to kiloamps
  • Integrated Coulomb Counter

Onboard Passive Balancing

  • Onboard 300 mA Low Rdson passive cell balancing metal-oxide-semiconductor field-effect transistors with diagnostics
  • Balancing in sleep mode
  • Programmable balancing timer for each MOSFET

Isolated Daisy Chain or SPI Communication

  • 2.0 Mbps, 2 wire twisted-pair differential and isolated daisy chain communication
  • Inductive and capacitive coupling support
  • Up to 63 nodes in one daisy chain
  • Loopback support for one daisy chain
  • Addressable on initialization
  • 4 Mbps serial peripheral interface (SPI)

Diagnostics, Functional Safety and Robustness

  • overvoltage / undervoltage (OV/UV) (OT/UT) and overcurrent (OC) fault verification
  • Sleep mode OV/UV and OT/UT monitoring
  • Support ISO 26262, up to ASIL D safety capability
  • Hot plug capable and AEC Q-100 compliant

Documentation

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Compact List

Design Resources

Software

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1 software file

  • Debugging and Visualization Tools

    HVBMS 400V Automotive Software Package Manager

    EXTERNALRev 1Aug 20, 2025 10:14:00HVBMS-400-AUTO-SW-PKG-MANAGER
    Download

Note: For better experience, software downloads are recommended on desktop.

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