Aeroflex Microelectronic Solutions

Aeroflex Plainview's power products provide the aerospace and avionic markets with Battery Electronics Units (BEUs) to promote and facilitate the safe use of large Li-Ion batteries on missions greater than 20 years. High-speed power controllers and voltage regulators round out their product offering.

Battery Electronic Units (BEU)

Aeroflex BEU Products

Aeroflex Plainview's new Battery Electronic Unit (BEU) Family are a lithium-ion cell balancing system offering a variety of BEUs for your high-reliability applications.

Aeroflex’s BEU was launched into orbit in November 2010. It is now fully operational in space flight on a Boeing 702HP Geomobile satellite and has achieved Technology Readiness Level 9 (TRL 9), NASA and the DoD’s highest level of technology maturity.

BEU Family: Standard Features
  • Cell voltage monitoring and telemetry
  • Cell balancing to within +/-5.0mV
  • Cell voltage monitoring accuracy +/-10mV
  • Total battery voltage monitoring accuracy +/-0.3% of full scale
  • MIL-STD-1553B telemetry for data logging and monitoring
  • Discrete output lines for critical signaling with user definable thresholds:
    • Over-voltage protection -- 4.40V typ
    • Cell voltage high -- 4.20V typ
    • Cell voltage low -- 3.20V typ


    • For questions or to order Datasheets, click here.

    BEU8642 Eval
    • Balancing and 8-cell lithium-ion batteries
    BEU8635-08
    • Balancing and monitoring for 8-cell lithium-ion batteries
    BEU8635-12
    • Balancing and monitoring for 12-cell lithium-ion batteries
    BEU8635-24
    • Balancing and monitoring for 24-cell lithium-ion batteries
    BEU8636-08
    • Balancing and monitoring for 8-cell lithium-ion batteries
      • Reconditioning load control
      • Bypass device driver option
    BEU8636-12
    • Balancing and monitoring for 12-cell lithium-ion batteries
      • Reconditioning load control
      • Bypass device driver option
    BEU8636-24
    • Balancing and monitoring for 24-cell lithium-ion batteries
      • Reconditioning load control
      • Bypass device driver option
    BEU8637-08
    • Independent balancing and monitoring for two 8-cell lithium-ion batteries
    BEU8637-12
    • Independent balancing and monitoring for two 12-cell lithium-ion batteries
    BEU8638-08
    • Balancing and monitoring for two 8-cell lithium-ion batteries
      • Reconditioning load control
      • Bypass device driver option
    BEU8638-12
    • Independent balancing and monitoring for two 12-cell lithium-ion batteries
      • Reconditioning load control
      • Bypass device driver option
    BEU8640-24
    • Dual redundant balancing and monitoring for 24-cell lithium-ion batteries
      • Dual redundant control, cell balancing, monitoring
      • Reconditioning load control
      • 24 cell bypass device drivers