MC34932 Datasheet, PDF (14/24 Pages) Freescale Semiconductor, Inc – Dual 5.0 A H-Bridge

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS
LOGIC COMMANDS
Table 5. Truth Table
The tri-state conditions and the status flag 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
Forward
Reverse
Freewheeling Low
Freewheeling High
Disable 1 (D1)
IN1 Disconnected
IN2 Disconnected
D1 Disconnected
Undervoltage Lockout⁽³⁰⁾
Overtemperature⁽³¹⁾
Short-circuit⁽³¹⁾
Sleep mode EN/D2
EN/D2 disconnected
EN/D2
H
H
H
H
H
H
H
H
H
H
H
L
Z
Input Conditions
D1
IN1
L
H
L
L
L
L
L
H
H
X
L
Z
L
X
Z
X
X
X
X
X
X
X
X
X
X
X
IN2
L
H
L
H
X
X
Z
X
X
X
X
X
X
Status
SF
H
H
H
H
L
H
H
L
L
L
L
H
H
Outputs
OUT1
OUT2
H
L
L
H
L
L
H
H
Z
Z
H
X
X
H
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Notes
30. In the event of an undervoltage condition, the outputs tri-state and status flag is SET logic LOW. Upon undervoltage
recovery, status flag is reset automatically or automatically cleared and the outputs are restored to their original operating
condition.
31. When a short-circuit or overtemperature condition is detected, the power outputs are tri-state latched-OFF independent of
the input signals and the status flag is latched to logic LOW. To reset from this condition requires the toggling of either D1,
EN/D2, or V_PWR.
Forward
VPW _R
VPW _R
Load
C ur ren t
ON
OUT1
LOAD
OFF
OUT2
OFF
ON
PGND
PGND
High-Side Recirculation
(Forward)
VPWR
VPWR
ON
OUT1
Load
Current
LOAD
ON
OUT2
OFF
OFF
Reverse
VPW _R
VPW _R
Load
C ur re nt
OFF
OUT1
LOAD
ON
OUT2
ON
OFF
PGND
PGND
PGND
PGND
Figure 12. 34932 Power Stage Operation
Low-Side Recirculation
(Forward)
VPWR
VPWR
OFF
OUT1
ON
LOAD
Load
Current
OFF
OUT2
ON
PGND
PGND
34932
14
Analog Integrated Circuit Device Data
Freescale Semiconductor