Hi team,
When the device works in slow current decay, both low-side FETs are enabled, and the current circuit loop is approximateto a LR discharge circuit,and the current decay formula related to the off-time and load is:
where I0 is the current before current decay, that is, peak current attainable.
And what I confused is, when the device is working in fast decay mode, what is the current formula related to the off-time and load? In the fast current decay, the current flows back into the supply voltage. Does the current decay just as the speed of current rising?
Another problem, Is there any relationship between the output voltage (|VOUT1-VOUT2|)and the power supply VM? For example, when VM = 30V, I measured the output voltage as 24V. I guess there may be a proportional relationship between the two.
Thank for your help.