l9929xp STMicroelectronics, l9929xp Datasheet - Page 10

• Manufacturer Part Number: l9929xp
• Description: Spi Controlled H-bridge
• Manufacturer: STMicroelectronics

L9929
1.)
2.)
3.)
4.)
Description of the state „Z“
Figure 11.
10/23
If Mode „SPI-Diagnosis is selected (see chapter "Diagnostic / SPI-Interface")
In case of undervoltage tristate and status-flag are reset automatically.
Whenever overcurrent or overtemperature is detected, the fault is stored (i.e. status-flag remains low).
The tristate conditions and the status-flag
L = Low
H = High
X = High or Low
Z = High impedance
Overcurrent:
Overtemperature:
Undervoltage:
If Mode „Status-Flag“ is selected (see chapter "Diagnostic / Status-Flag")
The state „Z“ has, depending on the previous operating condition different meaning.
1. dynamical
2. statical
I. e. the inductive load is current carrying and is switched off according to Pos. 5, 6, 9, 10, 11, 12, 13, or
14 of the truth table
a.) All output stage transistors are switched off.
b.) The current flow is continued via the free wheeling diodes.
c.) Free wheeling is detected by a negative voltage-level at OUn.
d.) Switch on of the parallel-transistor of the current carrying diode.
f.) Free wheeling is finshed, if the voltage-level on OUn is positive again.
g.) all output-stages switched off.
(all output stage transistors are switched off in static state. For more inform. see next page )
V
I
-I
V
S
LOAD
I
GND
OUn
-VD
VS
V
-V
S
S
-
S
I
T
V
OUT1,2
CARRYNG
CURRENT
j
Vs-GND
>10.6 A
>175°C
<4.5V
3)
FREE WHEELING
are reset via DI or EN.
Zº
(at least down to 2.5V)
HIGH IMPEDANCE
Z
D01AT478