Part Number:DRV8305-Q1
I referred to the following E2E.
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Question.
During the blanking time of the current shunt amplifier outputs, what will be the status of SO?
Answer.
For DRV8305 we don't have any type of sample-and-hold on the CSA output.
During the blanking time we're ignoring the voltage measurement on the CSA inputs, so the SO pin should be equivalent to whatever the output bias is set to for this specific device variant.
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It is stated that voltage measurement value of CSA input is ignored during blanking time.
I want to confirm how CSA internal circuit operates and the voltage of CSA input is ignored.
Q1.
When Blanking Time is enabled,
CaseA : Input switch and output switch of CSA turn OFF
CaseB ：Input switch of CSA turn OFF
CaseC ：Output switch of CSA turn OFF
Which one is correct?
(Please see the attached file.)
Q2.
I looked up below to investigate the effect of blanking time.
Figure 49 (blanking time disabled) and Figure 50 (blanking time enable) are on page 38.
Ringing of CSA output is masked by blanking time.
I understand like this.
However, I do not know the advantage of using blanking time.
For example, if blanking time is used, will ringing of CSA output settle quickly?Please could you provide a comparative waveform that can confirm the advantage?
-Harukawa
(Please visit the site to view this file)