We are currently using TLVH431AQDCKR.
We are considering changing the Vref tolerance from grade A (1%) to grade B (0.5%) or standard grade (1.5%).
We have a question about this.
[question]
Does the frequency characteristic of TLVH431 (as shown in Figure 11 on the data sheet) change depending on the Vref tolerance grade?
I think that the difference in grade is only the change in the accuracy of Vref in the equivalent circuit as shown in Figure 21,
and the frequency characteristic and noise immunity of TLVH431 may not occur.
Is this understanding correct?
[About the current usage]
We use TLVH431 for output voltage control of flyback converters as shown in the figure 23.
If the frequency characteristic of TLVH431 changes due to a grade change,
We are concerned about the risk of malfunction in immunity tests (for example, Fast Transient Burst) due to changes in resistance to external noise.
Best regards.
