15

9,16

11

10

12

13

14

IN-

IN+

RDY

RST

10k

10k

FLT

0.1 F

GND1

3V - 5V

10R

ISO5451

C

FLT s

RSTs

to other

to other

15

9,16

11

10

12

13

14

IN-

IN+

RDY

10k

10k

0.1 F

GND1

3V - 5V

10R

ISO5451

C

15

9,16

11

10

12

13

14

IN-

IN+

RDY

10k

10k

0.1 F

GND1

3V - 5V

10R

ISO5451

C

FLT

RST

FLT

RST

ISO5451

SLLSEO1B – JUNE 2015 – REVISED DECEMBER 2015

www.ti.com

10.2.2.4 Local Shutdown and Reset

In applications with local shutdown and reset, the FLT output of each gate driver is polled separately, and the

individual reset lines are asserted low independently to reset the motor controller after a fault condition.

Figure 45. Local Shutdown and Reset for Noninverting (left) and Inverting Input Configuration (right)

10.2.2.5 Global-Shutdown and Reset

When configured for inverting operation, the ISO5451 can be configured to shutdown automatically in the event

of a fault condition by tying the FLT output to IN+. For high reliability drives, the open drain FLT outputs of

multiple ISO5451 devices can be wired together forming a single, common fault bus for interfacing directly to the

micro-controller. When any of the six gate drivers of a three-phase inverter detects a fault, the active low FLT

output disables all six gate drivers simultaneously.

Figure 46. Global Shutdown with Inverting Input Configuration

24

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