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LTC3871ELXE-1#PBF

LTC3871ELXE-1#PBF

Analog Devices
Switching Voltage Regulators Bi-dir PP Sync Buck or Boost Cntr
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Overview

The LTC3871ELXE-1#PBF is a high-performance bidirectional polyphase synchronous buck or boost controller designed for high-power automotive and industrial systems. It operates across two voltage domains, such as 48V and 12V, allowing for seamless energy transfer and battery charging in either direction.

Why Choose This Part

The controller features a unique architecture that allows the same external components to be used for both buck and boost modes, maximizing efficiency. It supports up to 12-phase operation to minimize output ripple and reduce EMI, while the proprietary current mode control ensures excellent phase current matching.

Applications

48V/12V Automotive Dual Battery Systems
Manages energy transfer between a 48V Li-Ion battery and a 12V Lead-Acid battery in mild hybrid electric vehicles.
Bidirectional Power Conversion
Provides buck conversion for accessory power and boost conversion for engine starting or energy recovery.
High Power Backup Systems
Enables bidirectional charging and discharging of battery stacks in industrial uninterruptible power supplies.
Redundant Power Distribution
Supports high-current multiphase power delivery for server and telecommunications infrastructure.

Getting Started

Engineers should evaluate the design using the DC2105A or DC2344A demonstration circuits to observe bidirectional transitions. Ensure proper layout of the power stage components to manage high current paths and utilize the LTspice models for loop stability analysis and efficiency simulation.