Treat D2/V3 as a 3.6V zener...the lowest zener available was 6.8
Trace shows Q1 collector voltage
Thanks DUG. Waiting for new PCBs with independent coils.
Think the chip is somehow affected by the different tests. Right now I have independent coils on on channel and no coils on the other, and it still starts up as shown in the video, so I have to disconnect the speaker at startup ....
Asked TI if it could be run with common coils, and they said yes ..... maybe the slight difference I know was on the last coil between the 2 windings is enough to make it not work well ....
Think the chip is somehow affected by the different tests. Right now I have independent coils on on channel and no coils on the other, and it still starts up as shown in the video, so I have to disconnect the speaker at startup ....
Asked TI if it could be run with common coils, and they said yes ..... maybe the slight difference I know was on the last coil between the 2 windings is enough to make it not work well ....
