LM5171
80-V dual-channel bidirectional buck-boost controller
LM5171
- 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.
Documentación técnica
Tipo | Título | Fecha | ||
---|---|---|---|---|
* | Data sheet | LM5171 Dual Channel Bidirectional Controller datasheet | PDF | HTML | 16 jun 2024 |
Diseño y desarrollo
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LM5171EVM-BIDIR — Módulo de evaluación LM5171
Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
---|---|---|
HTQFP (PHP) | 48 | Ultra Librarian |
Pedidos y calidad
- RoHS
- REACH
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- Acabado de plomo/material de la bola
- Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
- Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
- Contenido del material
- Resumen de calificaciones
- Monitoreo continuo de confiabilidad
- Lugar de fabricación
- Lugar de ensamblaje
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