Catalog
80-V dual-channel bidirectional buck-boost controller
Key Features
• Functional Safety-Capable85V HV-port and 80V LV-port max ratings1% Typical accuracy of bidirectional current regulation1% Typical accuracy of channel current monitoringI2C interface for monitoring and diagnosisBuilt-in 3.5V 1% reference voltageIntegrated 5V 10mA bias supply5A peak half-bridge gate driversProgrammable or adaptive dead-time controlProgrammable oscillator frequency up to 1MHz with optional synchronization to external clockIndependent channel enabling control inputsIntegrated both current and voltage loop controlProgrammable cycle-by-cycle peak current limitOver-temperature shutdownHV and LV port overvoltage protectionDynamically selectable diode emulation and forced PWM operation modesProgrammable soft-start timerSupport both multiphase and independent channel operationsSupport urgent shutdown latchFunctional Safety-Capable85V HV-port and 80V LV-port max ratings1% Typical accuracy of bidirectional current regulation1% Typical accuracy of channel current monitoringI2C interface for monitoring and diagnosisBuilt-in 3.5V 1% reference voltageIntegrated 5V 10mA bias supply5A peak half-bridge gate driversProgrammable or adaptive dead-time controlProgrammable oscillator frequency up to 1MHz with optional synchronization to external clockIndependent channel enabling control inputsIntegrated both current and voltage loop controlProgrammable cycle-by-cycle peak current limitOver-temperature shutdownHV and LV port overvoltage protectionDynamically selectable diode emulation and forced PWM operation modesProgrammable soft-start timerSupport both multiphase and independent channel operationsSupport urgent shutdown latch
Description
AI
The LM5171 controller provides the high voltage and precision elements of a dual-channel bidirectional converter. Examples include dual battery systems. The LM5171 supports multiphase parallel operation with balanced current sharing in each phase. The LM5171 also supports independent channel bi-directional operations making it versatile as standalone controller operating as multiphase Buck/Boost or independent Buck or Boost.
The dual-channel differential current sense amplifiers and dedicated channel current monitors achieve typical accuracy of 1%. The robust 5A half-bridge gate drivers are capable of driving parallel MOSFETs for scaling more power per channel. The controller can be dynamically programmed to operate in either the diode emulation mode (DEM) or forced PWM (FPWM) mode. Versatile protection features include cycle-by-cycle current limiting, overvoltage protection at both HV and LV ports, and overtemperature protection and urgent shutdown latch.
The LM5171 controller provides the high voltage and precision elements of a dual-channel bidirectional converter. Examples include dual battery systems. The LM5171 supports multiphase parallel operation with balanced current sharing in each phase. The LM5171 also supports independent channel bi-directional operations making it versatile as standalone controller operating as multiphase Buck/Boost or independent Buck or Boost.
The dual-channel differential current sense amplifiers and dedicated channel current monitors achieve typical accuracy of 1%. The robust 5A half-bridge gate drivers are capable of driving parallel MOSFETs for scaling more power per channel. The controller can be dynamically programmed to operate in either the diode emulation mode (DEM) or forced PWM (FPWM) mode. Versatile protection features include cycle-by-cycle current limiting, overvoltage protection at both HV and LV ports, and overtemperature protection and urgent shutdown latch.
