TCAN1043-Q1: low power method for TCAN1043

Hi,

TCAN1043-Q1 has a variety of operating modes that allow the device to save power when various functions are not needed. Normal Mode is used when transmitting data on the CAN bus and will allow all functions of the device to be active. When the driver is not needed but the node should still monitor CAN traffic, the device can be placed in silent mode by driving the EN pin LOW. This will deactivate the CAN driver to save power while still allowing the RXD pin to mirror the bus state. Lastly, if the node is not being used for some time and would like to be put in a low power mode, nSTB can be driven LOW (with interrupts cleared) to put the device in sleep mode. This is the device's lowest power mode that will also turn off the INH pin. Meant as the input to a local power device, this will allow the entire node to go into a low power mode until a wake-up condition is seen by TCAN1043-Q1 which will wake up the device and re-enable INH to wake the node. 

Other modes include Go-to-Sleep Mode when the device is transitioning into Sleep Mode and a Protected Mode which is active when the device detects an under-voltage condition on the Vsup pin.

To optimize power usage in your design, you may consider which modes are desired in each functional state of your system. When features of TCAN1043-Q1 are not needed, they can be disabled to save power. Similarly, the device can also be used to put the entire node to sleep when idle to save power. 

I hope this information is helpful. Let me know if you have any more questions or if you would like clarification on any operating mode for TCAN1043-Q1.

Regards,
Eric

Hello,

Adding on to Eric's comment, if you want to read further about the low power modes supported by different CAN and LIN devices you could reference this application note:

https://www.ti.com/lit/an/slla442/slla442.pdf

Regards,
Max