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Tool/software:
Hi,
In the reference code provided, timer D is set in high resolution with up mode. As per the code, dead band will be applicable only when high side fet signal falls from high to low and low side fet signal rise from low to high.
But during the transition of low side fet from high to low and high side from low to high there will be no dead band. So this will be causing a short circuit between supply and gnd right?. Why TI haven't added dead band at this time?
Is the reason for not using up/down mode for timer D in high resolution mode is that because the PWM signals are generated incorrectly in the down phase?
Is there any other way to generate dead band on both sides ?
Hi Cyril,
In the old software and hardware case, I didn't find short circuit happens.
I will check the code, but I think the normal function is okay.
Regards,
Bowen
Hi Bowen,
Thanks for the fast reply. For a synchronous buck, dead band should be there when high side turns on as well as when low side turns on? With upmode, it is not possible right?
Regards,
Cyril
Hi Cyril,
With upmode counting, it can achieve deadtime at both edge.
Regards,
Bowen
Hi Bowen,
Thank you for the information.It’s great to know that upmode counting can achieve deadtime at both edges.Can you please help me how I can achieve this as I am not able to find it anywhere else. Is TIDA-010042 reference code is having deadtime on both edges?
Regards,
Cyril
Hi Cyril,
I can help you with the MSPM0 version software. For MSP430, I am not too familiar with the deadband software. You could ask MSPM0 product line for help.
Thanks.
Regards,
Bowen