JAJSOU3 March 2024 TPS1213-Q1
ADVANCE INFORMATION
The TIDA-020065 automotive smart fuse design is targeted for power-distribution box and zone-control module systems. As vehicles shift from domain-based architecture to zone-based architecture, these systems aim to replace the standard melting fuse with a semiconductor design to allow for the following:
Resettable fuses, which allow for optimized cable wiring as fuses no longer need to be in an easily-accesible location.
Improved time-current characteristics across temperature, which allows for optimized harness cable diameter and reduced cost due to less variability between devices compared to standard melting fuses.
Nevertheless, replacing the melting fuse introduces the following challenges:
Wire harness protection during overload and short-circuit events while avoiding tripping during peak load transient events
Protect the FETs from uncontrolled inrush currents while charging load bulk capacitors
Reducing semiconductor power consumption in key-off state for powered-at-all-times loads
The TIDA-020065 aims to demonstrate how these challenges can be addressed at a system level for highcurrent loads. This design features the TPS12130-Q1 device for driving a main power path in the drive state, and a low power path for the key-off state. This design also features the INA296B3-Q1 device which is used to sense the load current so the MSPM0L1306-Q1 can run a software-based I2t algorithm to replicate fuse behavior.