Current Feedback - Infineon iMOTION EVAL-M1-099M-C User Manual

EVAL-M1-099M-C User Manual
iMOTION™ Modular Application Design Kit
Schematics and Layout
5.2

Current feedback

Current Feedback Gain—the control on this board has an internal current feedback amplifier which has default
gain. The user can use this gain to count the current sensing range and Internal Itrip. An example is shown in
Figure 6. The sample resister is 0.25Ω.
When input = 0V, IFBO = 601mV
Current sensing range is depending on current sample resister.
The part of protect circuit, when using single shunt: Iu current feedback OPAMP internal Itrip can protect
overcurrent if the system response designed as demand.
When using leg shunt. The gate kill signal from power module works. That is protected by outside IRMCK099.
When using single shunt. IV+ and IV- connect GND.
Figure 6 depicts the Eval-M1-099M evaluation board is suitable for single shunt and leg shunt for current
feedback.
The part of Current feedback on the Eval-M1-099M evaluation board
Figure 6
Application Note
��17 = ��13 ∗ 1.5,
Current Feedback �������� =
Current sensing range =
Current sensing range =
IC maximum specification Itrip level − 0.601V
Internal Itrip =
1.306V−0.601V
Internal Itrip =
1.302∗0.25Ω
��16 = ��13 ∗ 3
��13 7.68��
= = 1.302
��14 5.9��
0.599
Current Gain ∗ Sample resister
0.599
= 1.84��
1.302∗0.25Ω
Current Gain∗ Sample register
=2.17A
12 <Revision 1.0>
<2017-08-21>