Other Parts Discussed in Thread: DRV8306
Hi all
Would you mind if we ask DRV8323?
<Question1>
We would like to confirm Connection between hall sensors and INLA, INHB and INLB.
It seems that the connection are simple. Hall sensor's output connects to each pins.
As the background of this question, we could not find any comparators on the block diagram.
So, are there negative inputs(1/2DVDD) internally?
<Question2>
In relation to <Question1>, should hall sensor's power source and pull-up use DVDD?
<Question3>
There is no FG pin compared with DRV8306.
If we use DRV8323, what signals should we use instead of FG?
(->Hall sensors? With connecting hall sensors to CPU port, should we use these signals instead of FG?)
<Question4>
There is no PWM Limiter function and Sense OCP function compared with DRV8306.
So, it requires to consider these function at CPU side using SOX signal(amplified current information), right?
Especially, there is the description on the DRV8306's datasheet as follows;
"If the current limit activates, the high-side FET is disabled until the beginning of the next PWM cycle.
Because the synchronous rectification is always enabled, when the current limit activates,
the low-side FET is activated while the high-side FET is disabled."
->So, in case of DRV8323, if we realize the same operation, does it require following procedures?
-CPU detects Itrips threshold
-PWM=stop 1 cycle
-INLC=Low(Brake)
- After 1 cycle, CPU confirm current value
Kind regards,
Hirotaka Matsumoto
