33926 Datasheet, PDF (14/24 Pages) Freescale Semiconductor, Inc – 5.0 A Throttle Control H-Bridge

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
LOGIC COMMANDS AND REGISTERS
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
Free Wheeling Low
Free Wheeling High
Disable 1 (D1)
Disable 2 (D2)
IN1 Disconnected
IN2 Disconnected
D1 Disconnected
D2 Disconnected
Undervoltage Lockout ⁽³⁰⁾
Overtemperature ⁽³¹⁾
Short Circuit ⁽³¹⁾
Sleep Mode EN
EN Disconnected
EN
H
H
H
H
H
H
H
H
H
H
H
H
H
L
Z
Input Conditions
D1
D2
IN1
L
H
H
L
H
L
L
H
L
L
H
H
H
X
X
X
L
X
L
H
Z
L
H
X
Z
X
X
X
Z
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
IN2
L
H
L
H
X
X
X
Z
X
X
X
X
X
X
X
Status
SF
H
H
H
H
L
L
H
H
L
L
L
L
L
H
H
Outputs
OUT1
OUT2
H
L
L
H
L
L
H
H
Z
Z
Z
Z
H
X
X
H
Z
Z
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, D2, EN, or VPWR.
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 11. 33926 Power Stage Operation
Low-Side Recirculation
(Forward)
VPWR
VPWR
OFF
OUT1
ON
LOAD
Load
Current
OFF
OUT2
ON
PGND
PGND
33926
14
Analog Integrated Circuit Device Data
Freescale Semiconductor