IRAMS10UP60B

www.irf.com

7

LIN1,2,3

HIN1,2,3

t

fltclr

50%

U,V,W

I

BUS_trip

6µs

1µs

I

BUS

Sequence of events:

1-2) Current begins to rise

2) Current reaches I

2-3) Current is higher than I

over-current. In case of high current (short circuit), the actual delay will be smaller.

3-4) Delay between driver identification of over-current condition and disabling of all outputs

4) Current starts decreasing, eventually reaching 0

5) Current goes below I

6) Driver is automatically reset and normal operation can resume (over-current condition must be removed

by the time the drivers automatically resets itself)

3

4

2

1

5

6

Note 5: The shaded area indicates that both high-side and low-side switches are off and therefore the half-bridge output

voltage would be determined by the direction of current flow in the load.

Figure 2. I