TLE8110EE Datasheet, PDF (31/72 Pages) Infineon Technologies AG – Smart Multichannel Low Side Switch with Parallel Control and SPI Interface

FLEX
Smart Multi-Channel Switch
Diagnosis
8
Diagnosis
8.1
Description Diagnosis
The TLE8110EE provides diagnosis information about the device and about the load. Following diagnosis flags
have been implemented for each channel:
• The diagnosis information of the protective functions, such as “over current” and“over temperature”
• The open load diagnosis
• The short to ground information.
Updating the Diagnosis is based on a filter-dependent standard delay time of typ. 150µs. This value is set as a
default.
Refer to Figure 16 for details.
Application Hint:
In specific application cases - such as driving Uni-Polar Stepper Motor - it might be possible, that reverse currents
flow for a short time, which possibly can disturb the diagnosis circuit at neighboring channels and cause wrong
diagnosis results of those channels. To reduce the possibility, that this effect appears in a certain timing range,
the filter time of Channels 7 to 10 can be extended to typ. 2.5ms or typ. 5ms by setting the “Diagnosis Blind Time”
- Bits (DBTx). If Channels 7 to 10 are used for driving loads causing reverse currents, they influence each other
and additionally might affect Channels 5 and 6 . It is recommended to use the channels 7 + 8 and 9 + 10 as pairs
for anti-parallel control signals, such as for the stepper motors. For logic setting details, see chapter “Control of
the Device”
V_DD
Diagnosis
Register
MUX
00
01
10
Latch
ID Ss g
Latch
IDSpd
VD Ss g
VD So l
gate control
OUTn
Temp.
Sensor
Latch OR
n
protective functions
n
Figure 16 Block Diagram of Diagnosis
GND
Diagnosis- serial .vsd
Data Sheet
31
Rev. 1.0, 2009-06-15