Analog Devices Inc. LTC7841 PolyPhase® Synchronous Boost Controllers

Analog Devices Inc. LTC7841 PolyPhase® Synchronous Boost Controllers drive two N-channel power MOSFET stages out-of-phase. Multiphase operation reduces input and output capacitor requirements and permits the use of smaller inductors than the single-phase equivalent. Synchronous rectification increases efficiency, reduces power loss, and eases thermal requirements enabling high power boost applications.

The LTC7841 features an output voltage that can be adjusted up to 60V with a 0.2% resolution via a PMBus-compliant serial interface. The serial interface can also be used to read back fault status, input/output current, input/output voltage, and temperature. The LTpowerPlay® development system supports monitoring and system configuration. The PolyPhase operation allows the LTC7841 to be configured for 2-, 3-, 4-, 6-, and 12-phase operation.

Features

  • Wide VIN Range: 4.5V to 60V
  • 1% Total Output Voltage Accuracy Over
  • Temperature at VIN = 12V
  • PMBus Compliant Serial Interface
    • Programmable VOUT: Up to 60V with 0.2% Resolution
    • Read Back of Average and Peak Temperature, Current, and Voltage (25Hz Refresh Rate)
    • Fault Status
  • Phase-Lockable Frequency of 75kHz to 850kHz
  • Less than 1ms Power-Up Time
  • Power Good Output Voltage Monitor
  • Internal LDO Powers Gate Driver from VBIAS or EXTVCC
  • Low Shutdown Current IQ <10µA
  • Clock Out for 4-Phase Operation (40A Output Current)
  • Available in a Thermally-Enhanced 5mm x 6mm QFN

Applications

  • Automotive Systems
  • Medical
  • Industrial

Power by Linear

Analog Devices Inc. LTC7841 PolyPhase® Synchronous Boost Controllers
Publicado: 2019-10-30 | Actualizado: 2022-03-10