User Manual
21
<Revision 1.0>
EVAL-M3-TS6-665PN User Manual
iMOTION™ Modular Application Design Kit
Hardware description of EVAL-M3-TS6-665PN
The PFCGK active setting current is 15.5A for EVAL-M3-TS6-665PN evaluation board. And the calculation
formula is as follows,
𝐼𝐼
𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃
=
�
𝑅𝑅
34
𝑅𝑅
34
+
𝑅𝑅
39
−
𝑅𝑅
45
𝑅𝑅
45
+
𝑅𝑅
44
�
∗ 𝑉𝑉
𝐷𝐷𝐷𝐷
𝑅𝑅
34
𝑅𝑅
34
+
𝑅𝑅
39
𝑅𝑅
𝑠𝑠4
=
�
𝑅𝑅
34
𝑅𝑅
39
−
(
𝑅𝑅
34
+
𝑅𝑅
39
)
∗ 𝑅𝑅
45
(
𝑅𝑅
45
+
𝑅𝑅
44
)
∗ 𝑅𝑅
39
�
∗ 𝑉𝑉
𝐷𝐷𝐷𝐷
𝑅𝑅
𝑠𝑠4
Please attention that for control board EVAL-M3-102T, it doesn’t use the external PFC gatekill signal PFCGK.
Note:
PFC Overcurrent protection circuit just generates the signal of PFCGK, and there is no more action for EVAL-
M3-TS6-665PN. The power board will not turn off the PFC gate driver IC if the control board doesn’t do
anything when PFCGK is active.
Figure 16
The PFCTRIPREF Circuit on the EVAL-M3-102T evaluation board
The PFC’s overcurrent protection circuit on the control board EVAL-M3-102T is shown in Figure 14 and Figure
16. The I
PFCTRIP_Peak
equal to 6.347A for the combination between EVAL-M3-102T and EVAL-M3-TS6-665PN only.
The calculation formula is as follows,
𝐼𝐼
𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃𝑃
𝑃𝑃eak
=
(
𝑅𝑅
25
∗ 𝑅𝑅
8
− 𝑅𝑅
6
∗ 𝑅𝑅
9
)
∗ 𝑉𝑉
𝐷𝐷𝐷𝐷
(
𝑅𝑅
8
+
𝑅𝑅
9
)
∗ 𝑅𝑅
6
∗ 𝑅𝑅
𝑠𝑠4
If larger PFC current protection setting value needed, please use smaller resistance of PFC shunt resistor RS4,
or modify the control board EVAL-M3-102T following the previous formula. Please refer to the control board’s
user manual for more details.
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