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www.linear.com/product/LTC38711-800-4-LINEAR

The LTC3871 bidirectional two-phase synchronous buck or boost controller brings a new level of performance and simplicity to 12V/48V automotive dual battery systems. Using the same external components for buck and boost modes significantly reduces complexity and solution size. Up to 97% efficiency can be achieved, and the maximum current delivered in either direction is controlled. Four control loops, two for current and two for voltage, along with overload protection in either direction provide a robust solution. 6kW to 8kW can be supplied in either mode with a 12-phase design.

Single IC 48V/12V Dual Battery Power Controller

Multi-kW BidirectionalPower Transfer

• Buck or Boost on Demand• Regulation of VIN, VOUT or Current• 48V Nominal Bus, Up to 100V• 12V Nominal Bus, Up to 30V• Up to 97% Efficiency• Up to 12-Phase Operation• AEC-Q100 Compliant• Engineered for Diagnostic Coverage in ISO 26262 Systems

Efficiency Buck & Boost Modes

INPUT VOLTAGE (V)–5 –2.5 0 2.5 5

–2.0

–1.5

–1.0

–0.5

0

0.5

1.0

1.5

2.0

INL

ERRO

R (p

pm)

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