TPIC0108B

PWM CONTROL INTELLIGENT H-BRIDGE

SLIS068 – NOVEMBER1998

10

POST OFFICE BOX 655303

PRINCIPLES OF OPERATION

DIAGNOSTICS TABLE (see Note 6)

FLAG

IN1

IN2

OUT1

OUT2

STATUS1†

STATUS2

Normal operation

0

0

1

1

0

1

0

1

Z

LS

HS

HS

Z

HS

LS

HS

1

1

1

1

0‡

1

1

1

Open circuit between OUT1 and OUT2

0

0

1

1

0

1

0

1

Z

LS

HS

HS

Z

HS

LS

HS

1

0

0

1

0‡

0

0

1

Short circuit from OUT1 to OUT2 (see Notes 7 and 8)

0

1

1

0

X

X

X

X

0

0

0

0

Short circuit from OUT1 to GND (see Notes 7 and 8)

1

1

0

1

X

X

X

X

0

0

0

0

Short circuit from OUT2 to GND (see Notes 7 and 8)

0

1

1

1

X

X

X

X

0

0

0

0

Short circuit from OUT1 to VCC (see Notes 7 and 8)

0

1

X

X

0

0

Short circuit from OUT2 to VCC (see Notes 7 and 8)

1

0

X

X

0

0

Over temperature (see Note 9)

0

0

1

1

0

1

0

1

Z

Z

Z

Z

Z

Z

Z

Z

1

0

0

0

0‡

0

0

0

† When wired with a pull-up resistor

‡ In quiescent mode, STATUS2 is pulled down to GND via an internal resistor.

SYMBOL

VALUE

0

Logic low

1

Logic high

HS

High-side MOSFET conducting

LS

Low-side MOSFET conducting

Z

No output transistors conducting

X

Voltage level undefined

NOTES:

6. All input combinations not stated result in STATUS output = 1.

7. STATUS1 active for a minimum of 3

µs.

8. STATUS2 active until an input is toggled.

9. Quiescent current consumption can occur only when the temperature drops below the thermal switch-off temperature.