l99dz80ep STMicroelectronics, l99dz80ep Datasheet - Page 39

• Manufacturer Part Number: l99dz80ep
• Description: Door Actuator Driver
• Manufacturer: STMicroelectronics

L99DZ80EP
Figure 15. H-bridge diagnosis
3.19
to be cleared through the SPI to reactivate the gate drivers. The drain source monitoring has
a filter time of typ. 6 µs. This monitoring is only active while the corresponding gate driver is
activated. If a drain-source monitor event is detected, the corresponding gate-driver remains
activated for at maximum the filter time. When the gate driver switches on, the drain-source
comparator requires the specified settling time until the drain-source monitoring is valid.
During this time, this drain-source monitor event may start the filter time. The threshold
voltage V
Table 26.
H-bridge monitoring in off-mode
The drain source voltages of the H-Bridge driver external transistors can be monitored,
while the transistors are switched off. If either bit OL_H1L2 or OL_H2L1 is set to ‘1’, while bit
HEN = ‘1’, the H-drivers enter resistive low mode and the drain-source voltages can be
monitored. Since the pull-up resistance is equal to the pull-down resistance on both sides of
DIAG<1>
0
0
1
1
SCd
H-bridge DS-monitor threshold
can be programmed using the SPI.
DIAG<0>
0
1
0
1
Doc ID 18260 Rev 4
Monitoring threshold voltage (typical)
V
V
V
V
SCD1
SCD2
SCD3
SCD4
= 0.5 V
= 1.0 V
= 1.5 V
= 2.0 V
Application information
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