Texas Instruments LM5171

Description

The LM5171-Q1 controller provides the essential high voltage and precision elements of a dual-channel bidirectional converter for example is automotive 48-V and 12-V dual battery systems. It supports multiphase parallel operation with balanced current sharing in each phase, and it can also support independent channel bi-directional operations making it versatile as standalone controller operating as Multiphase Buck/Boost or independent Buck or Boost.

Features

• AEC-Q100 qualified for automotive applications:
• Device temperature grade 1: –40°C to +125°C ambient operating range
• Device HBM ESD classification level 2
• Device CDM ESD classification level C4B
• Functional Safety-Capable
• 85-V HV-port and 80-V LV-port max ratings
• 1% Typical Accuracy of bidirectional currentregulation
• 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
• 5-A Peak half-bridge gate drivers
• Programmable or adaptive dead-time control
• Programmable oscillator frequency up to 1MHzwith 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 forcedPWM operation modes
• Programmable soft-start timer
• Support both multiphase and independent channeloperations
• Support urgent shutdown latch

Typical applications

• Super-cap or battery backup power converter
• Automotive, Industrial dual-battery systems, Battery Testing System (BTS)

More information

• Datasheet
• IC product information