ST STNRG011A, Руководство пользователя, Страница: 34 / 42

3.6.6 PFC ZCD comp falling thr
Size: 2 bits
Sets the falling threshold for the PFC ZCD comparator (TH_F).
Available values are:
•
0 mV
• 50 mV
• 100 mV
• 200 mV
3.6.7 PFC ZCD comp rising thr
Size: 2 bits
Sets the rising threshold for the PFC ZCD comparator (TH_R).
Available values are:
•
210 mV
• 110 mV (N/A with TH_F = 200 mV)
• 310 mV
• TH_F + 10 mV
Use
The rising threshold of the PFC ZCD comparator must be higher than the falling one. For this reason, the
selection TH_F = 200 mV and TH_R = 110 mV is not allowed.
The last selection sets the rising threshold 10 mV higher with respect to any selection of the falling threshold.
3.6.8 PFC HW OVP comp digital filtering
Size: 2 bits
Sets the digital filtering for the PFC HW OVP comparator.
Available values are:
•
4.25 μs
• 2.12 μs
• 1.05 μs
• 516.7 ns
3.6.9 LLC OLP comp digital filtering
Size: 2 bits
Sets the digital filtering for the LLC OC1 comparator, for the OLP functionality.
Available values are:
•
No filtering
• 16.7 ns
• 33.3 ns
• 50 ns
Use
The value 16.7 ns can be used as the starting value.
In noisy applications, it could be needed to increase the filtering.
3.6.10 LLC OC2 comp digital filtering
Size: 2 bits
Sets the digital filtering for the LLC OC2 comparator.
UM3002
Comparators setting
UM3002 - Rev 1
page 34/42