概览

优势和特点

  • Unique Architecture Allows Dynamic Regulation of Input Voltage, Output Voltage or Current
  • Operates with External Gate Drivers and MOSFETs
  • VHIGH Voltages Up to 100V; VLOW Voltages Up to 60V
  • Synchronous Rectification: Up to 98% Efficiency
  • ADI-Proprietary Advanced Current Mode Control
  • ±1% Voltage Regulation Accuracy Overtemperature
  • Accurate, Programmable Inductor Current Monitoring and Bidirectional Regulation
  • SPI Compliant Serial Interface
    • Operation Status and Fault Report
    • Programmable VHIGH, VLOW Margining
  • Phase-Lockable Frequency: 60kHz to 750kHz
  • 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

产品详情

The LTC7871 is a high performance bidirectional buck or boost switching regulator controller that operates in either buck or boost mode on demand. It regulates in buck mode from VHIGH-to-VLOW and boost mode from VLOW-to-VHIGH depending on a control signal, making it ideal for 48V/12V automotive dual battery systems. An accurate current programming loop regulates the maximum current that can be delivered in either direction. The LTC7871 allows both batteries to supply energy to the load simultaneously by driving energy from either battery to the other.

Its proprietary constant frequency current mode architecture enhances the signal-to-noise ratio enabling low noise operation and provides excellent current matching between phases. Additional features include an SPI-compliant serial interface, discontinuous or continuous mode of operation, OV/UV monitors, independent loop compensation for buck and boost operation, accurate inductor current monitoring and overcurrent protection.

The LTC7871 is available in a 64 pin 10mm × 10mm LWE package.

Applications

  • Automotive 48V/12V Dual Battery Systems
  • Backup Power Systems

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