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LM5171

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Controlador buck-boost bidireccional de doble canal de 80 V

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LM5171

ACTIVO
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Detalles del producto

Rating Catalog Topology Boost, Buck, Buck/Boost Vin (max) (V) 75 Vin (min) (V) 1 Vout (max) (V) 80 Vout (min) (V) 3 Features 1-MHz maximum frequency, Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Bidirectional, Enable, Frequency synchronization, Light-load efficiency, Multiple outputs, Phase interleaving, Power good, Synchronous rectification, UVLO adjustable Duty cycle (max) (%) 99 Iq (typ) (A) 0.001 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
Rating Catalog Topology Boost, Buck, Buck/Boost Vin (max) (V) 75 Vin (min) (V) 1 Vout (max) (V) 80 Vout (min) (V) 3 Features 1-MHz maximum frequency, Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Bidirectional, Enable, Frequency synchronization, Light-load efficiency, Multiple outputs, Phase interleaving, Power good, Synchronous rectification, UVLO adjustable Duty cycle (max) (%) 99 Iq (typ) (A) 0.001 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150
HTQFP (PHP) 48 81 mm² (9 mm × 9 mm)
  • Functional Safety-Capable
  • 85V HV-port and 80V LV-port max ratings
  • 1% Typical accuracy of bidirectional current regulation
  • 1% Typical accuracy of channel current monitoring
  • I2C interface for monitoring and diagnosis
  • Built-in 3.5V 1% reference voltage
  • Integrated 5V 10mA bias supply
  • 5A peak half-bridge gate drivers
  • Programmable or adaptive dead-time control
  • Programmable oscillator frequency up to 1MHz with optional synchronization to external clock
  • Independent channel enabling control inputs
  • Integrated both current and voltage loop control
  • Programmable cycle-by-cycle peak current limit
  • Over-temperature shutdown
  • HV and LV port overvoltage protection
  • Dynamically selectable diode emulation and forced PWM operation modes
  • Programmable soft-start timer
  • Support both multiphase and independent channel operations
  • Support urgent shutdown latch
  • Functional Safety-Capable
  • 85V HV-port and 80V LV-port max ratings
  • 1% Typical accuracy of bidirectional current regulation
  • 1% Typical accuracy of channel current monitoring
  • I2C interface for monitoring and diagnosis
  • Built-in 3.5V 1% reference voltage
  • Integrated 5V 10mA bias supply
  • 5A peak half-bridge gate drivers
  • Programmable or adaptive dead-time control
  • Programmable oscillator frequency up to 1MHz with optional synchronization to external clock
  • Independent channel enabling control inputs
  • Integrated both current and voltage loop control
  • Programmable cycle-by-cycle peak current limit
  • Over-temperature shutdown
  • HV and LV port overvoltage protection
  • Dynamically selectable diode emulation and forced PWM operation modes
  • Programmable soft-start timer
  • Support both multiphase and independent channel operations
  • Support 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.

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.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM5171 Dual Channel Bidirectional Controller datasheet PDF | HTML 16/06/2024
Application brief Multiphase Operation of LM5171 PDF | HTML 24/04/2026
Application brief Seamless Bidirectional Operation of LM5171 PDF | HTML 13/04/2026
Nota sobre la aplicación How to Use the Two Channels of LM5171 Independently PDF | HTML 30/10/2025
Nota sobre la aplicación U-140 Average Current Mode Control of Switching Power Supplies 5/09/1999

Diseño y desarrollo

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Placa de evaluación

LM5171EVM-BIDIR — Módulo de evaluación LM5171

El módulo de evaluación (EVM) LM5171EVM-BIDIR es un convertidor bidireccional intercalado de fase dual ideal para aplicaciones de sistemas de batería dual de 48 V a 12 V. Es apilable multifásico con ángulo de intercalación ajustable y reparto equilibrado de la corriente. El EVM también incluye (...)
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Herramienta de cálculo

LM5171-CALC — LM5171-Q1 Quickstart Calculator

LM5171-Q1 Quickstart Calculator helps on design of the power stage, current loop and voltage loop. Component calculations for the controller are also included.
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HTQFP (PHP) 48 Ultra Librarian
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