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Analog Devices Inc. LTC7871 Bidirectional Buck or Boost Controllers

Analog Devices Inc. LTC7871 Bidirectional Buck or Boost Controllers are a high-performance switching regulator controllers that operate either in buck or boost mode on demand. The buck mode operates from VHIGH to VLOW and boost mode operates from VLOW to VHIGH depending on the control signal. This makes it ideal for 48V/12V automotive dual battery systems that allow both the batteries to supply energy to the load simultaneously.

The LTC7871 controllers exhibit unique architecture that allows dynamic regulation of input voltage, output voltage, or current. These buck or boost controllers feature SPI compliant serial interface, discontinuous or continuous mode of operation, OV/UV monitors, accurate inductor current monitoring, and overcurrent protection. The LTC7871 controllers are available in a 64 pin 10mm × 10mm LQFP package and are AEC-Q100 qualified.

Features

  • Unique architecture allows dynamic regulation of input voltage, output voltage, or current
  • Operates with external gate drivers and MOSFETs
  • VHIGH voltages Up to 100V and VLOW voltages Up to 60V
  • Synchronous rectification: Up to 98% efficiency 
  • Accurate, programmable inductor current monitoring, and bidirectional regulation
  • SPI compliant serial interface
    • Operation status and fault report
    • Programmable VHIGH and VLOW margining
  • 60kHz to 750kHz phase-lockable frequency
  • ADI-proprietary advanced current mode control
  • ±1% voltage regulation accuracy overtemperature
  • Optional spread spectrum modulation
  • Multiphase/multi-ICs operation up to 24 phases
  • Selectable CCM/DCM/burst mode operation
  • Thermally enhanced 64-lead LQFP package
  • AEC-Q100 qualification in progress

Applications

  • Automotive 48V/12V dual battery systems
  • Backup power systems

Associated Demo Board

Placa de demostración DC2886A LTC7871/LTC7060

Analog Devices Inc. Placa de demostración DC2886A LTC7871/LTC7060

Diseñada para demostrar los cargadores/suministro bidireccionales PolyPhase® de alta potencia LTC7871/LTC7060.

Learn Moreacerca de Analog Devices Inc. Placa de demostración DC2886A LTC7871/LTC7060 View Productsrelacionado con Analog Devices Inc. Placa de demostración DC2886A LTC7871/LTC7060

Application Circuit

Application Circuit Diagram - Analog Devices Inc. LTC7871 Bidirectional Buck or Boost Controllers

Boost-to-Buck Transition Graph

Performance Graph - Analog Devices Inc. LTC7871 Bidirectional Buck or Boost Controllers
Publicado: 2020-04-03 | Actualizado: 2022-03-11