Synchronous buck/boost controller for dual battery automotive and industrial systems

Analog Devices LT8228 Synchronous Buck/Boost Controller is a 100V bidirectional constant-current or constant-voltage synchronous buck or boost controller incorporating an independent compensation network. The direction of the power flow is determined automatically by the device or externally controlled. The input and output protection MOSFETs guard against negative voltages, control inrush currents, and give isolation between terminals under fault conditions including switching MOSFET shorts. In buck mode, the protection MOSFETs at the V1 terminal stops reverse current. In boost mode, the same MOSFETs control the output inrush current and shields itself with an adjustable timer circuit breaker

The device offers bidirectional input and output current limit as well as independent current monitoring. Masterless, fault-tolerant current sharing enables any of the devices in parallel to be added or deducted while sustaining current sharing accuracy. Internal and external fault diagnostics and reporting are offered via the FAULT and REPORT pins. The device is offered in a 38-lead TSSOP package.

Typical applications include dual battery automotive and industrial systems, high power system backup and supply stabilisation, 'N+1' redundant, high-reliability power supplies, and power interrupt protection systems.