Automotive, 80-V dual-channel bidirectional buck-boost controller

The LM5171-Q1 controller provides the high voltage and precision elements of a dual-channel bidirectional converter, examples include dual battery systems. The LM5171-Q1 supports multiphase parallel operation with balanced current sharing in each phase. The LM5171-Q1 also supports independent channel bi-directional operation 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 a typical accuracy of 1%. The robust 5A half-bridge gate drivers are capable of driving parallel MOSFETs for more power per channel. Program the controller dynamically to operate in either diode emulation mode (DEM) or forced PWM (FPWM) mode. Versatile protection features include cycle-by-cycle current limiting, overvoltage protection, overtemperature protection and urgent shutdown latch.