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DRV8412 strange behaviour

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Hello,

Could anyone explain me this bdrv8412 behaviour?

My DRV is in mode (M3 = 0, M2 = 1, M1 = 1)  "Dual full bridges, one PWM input each full bridge with complementary PWM on second half bridge"

My input signal on Pin17 (PWM_A) is a PWM duty cycle swipe from 1 to 99% @ 1 kHz. There is no load attached to the outputs.

From 0 to about 45% the output yellow is working fine and is doing what I expect out of the blue input line. 

Above 45% duty cycle the behavior is a bit more special:

Does these pictures make any sense for you?

Cheers,

Chris


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