33886_07 Datasheet, PDF (12/25 Pages) Freescale Semiconductor, Inc – 5.0 A H-Bridge

TYPICAL SWITCHING WAVEFORMS
Table 5. Truth Table
The tri-state conditions and the fault status are reset using D1 or D2. The truth table uses the following notations: L = Low,
H = High, X = High or Low, and Z = High impedance (all output power transistors are switched off).
Device State
Input Conditions
Fault Status
Flag
Output States
D1
D2
IN1
IN2
FS
OUT1
OUT2
Forward
L
H
H
L
H
H
L
Reverse
L
H
L
H
H
L
H
Freewheeling Low
L
H
L
L
H
L
L
Freewheeling High
L
H
H
H
H
H
H
Disable 1 (D1)
H
X
X
X
L
Z
Z
Disable 2 (D2)
X
L
X
X
L
Z
Z
IN1 Disconnected
L
H
Z
X
H
H
X
IN2 Disconnected
L
H
X
Z
H
X
H
D1 Disconnected
Z
X
X
X
L
Z
Z
D2 Disconnected
Undervoltage ⁽²⁸⁾
Overtemperature ⁽²⁹⁾
Short Circuit ⁽²⁹⁾
X
Z
X
X
L
Z
Z
X
X
X
X
L
Z
Z
X
X
X
X
L
Z
Z
X
X
X
X
L
Z
Z
Notes
28. In the case of an undervoltage condition, the outputs tri-state and the fault status is set logic Low. Upon undervoltage recovery, fault
status is reset automatically or automatically cleared and the outputs are restored to their original operating condition.
29. When a short circuit or overtemperature condition is detected, the power outputs are tri-state latched-OFF independent of the input
signals and the fault status flag is set logic Low.
33886
12
Analog Integrated Circuit Device Data
Freescale Semiconductor