TIDA-00653: Schematic of Bi-Directional Firmware for TIDA-00653

Hi Scarecrow

The reverse protection protects against the 12V battery being connected in reverse. If the source of Q8 is brought negative by a reversed connection then no current can flow back into the power stage (through L3). This is automatic - so for example it operates even if the rest of the circuit has not yet been powered up. The Oring_ctr signal is used to turn on the channel of the FETs (Q8 etc) so that they can pass current from drain to source.

2/ I'm afraid I don't know the role of the SYNC signal but I've assigned this thread to a colleague who should be able to help.

Regards

Colin

Hi Scarecrow,

The sync signal is used to detect negative inductor currents for transition mode switching. The implementation is described in the firmware. 

Regards,

Sanatan