Analog Devices’ controllers enable full functional safety if one of the batteries fail by forcing the other battery to take over
Analog Devices’ LT8228 100 V bidirectional buck or boost DC/DC controllers provide sustainable power in hybrid and electric vehicle (EV) critical non-drive train subsystems by controlling 48 V and 12 V batteries with bidirectional capabilities allowing for power source redundancy. These controllers also enable full functional safety if one of the batteries fails by forcing the other battery to take over allowing the vehicle to function properly, avoiding potential catastrophic results.
- Automatically determines the direction of power flow or the direction can be externally controlled
- Provides a step-down output voltage when in buck mode or a step-up output voltage when in boost mode
- Input and output voltage can be set as high as 100 V
- Two error amplifiers, one for boost mode and the other for buck mode, with separate compensation pins
- 38-lead TSSOP package
The LT8228 automatically determines the direction of power flow, or the direction can be externally controlled. Input and output protection MOSFETs protect against negative voltages, control inrush currents, and provide isolation between terminals under fault conditions such as shorts in the switching MOSFETs. In step-down mode, protection MOSFETs prevent reverse current. In step-up mode, the same MOSFETs regulate the output inrush current and use an adjustable timer circuit breaker to protect themselves.