Bourns announced the release of the Model TBU-DB-Q bidirectional, dual channel, AEC-Q101 compliant high-speed protector for use in automotive battery sensing/balancing applications. The Model TBU-DB-Q Series of Bourns® TBU® products are precise and fast switching protectors constructed using MOSFET semiconductor technology and designed to protect against faults caused by short circuits, overvoltage transients and faults.
When placed in the system circuit, the TBU® High-Speed Protector will monitor the current with its MOSFET detection circuit, triggering precisely and quickly within 1μs to provide an effective barrier behind which sensitive electronics will not be exposed to large currents during transient events in accordance with its published specifications.
Applications are expected to include: RS-485 interfaces, Exposed sense and data lines, Factory automation, Automotive battery sensing/balancing, Protection modules and dongles, Process control equipment, and Test and measurement equipment.
The TBU® device is provided in a surface mount DFN package and meets industry standard requirements such as RoHS and Pb Free solder reflow profiles.
Summary of features:
- Superior circuit protection
- Overcurrent protection
- Blocks surges up to rated voltage limit
- High-speed performance
- Small SMT package
- RoHS compliant
- AEC-Q101 compliant
TBU® device operation
The TBU® device, constructed using MOSFET semiconductor technology, placed in the system circuit will monitor the current with the MOSFET detection circuit triggering to provide an effective barrier behind which sensitive electronics are not exposed to large voltages or currents during transient events. When operated, the TBU® device will limit the current to less than the Itrigger value within the tblock duration. If voltage above Vreset is continuously sustained, the TBU® device will subsequently reduce the current to a quiescent current level within a period of time that is dependent upon the applied voltage.
After the surge, the TBU® device resets when the voltage across the TBU® device falls to the Vreset level. The TBU® device will automatically reset on lines which have no dc bias or have dc bias below Vreset (such as unpowered signal lines).