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TLE75620-EST Fiches technique(PDF) 51 Page - Infineon Technologies AG

No de pièce TLE75620-EST
Description  SPIDER 12V SPI Driver for Enhanced Relay Control
Download  81 Pages
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Fabricant  INFINEON [Infineon Technologies AG]
Site Internet  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

TLE75620-EST Fiches technique(HTML) 51 Page - Infineon Technologies AG

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Datasheet
51
Rev. 1.0
2017-11-23
TLE75620-EST
SPIDER+ 12V
Diagnosis
Figure 28 Open Load at ON timings (direct channels diagnosis)
9.3.2
Open Load at ON - diagnosis loop
When DIAG_OLONEN.MUX bits are programmed with the value 1010B, the device starts a diagnosis loop
where all auto-configurable (when used as high-side switches) and high-side channels are checked for Open
Load at ON. The internal multiplexer is controlled by the internal logic, therefore there is no need for the
micro-controller to send any additional command.
First the internal logic checks all channels which are directly driven by the micro-controller and not configured
to be driven by the internal PWM generator, then the internal logic checks all channels which are configured
to be driven by the internal PWM generator.
• Diagnosis sequence for channels driven directly by the micro-controller
– First channel checked: channel 0. It is recommended that the channels are ON at least tON before
activating the diagnosis loop.
–After a time tOLONSET + tSYNC the diagnosis for the first channel is completed (DIAG_OLON.OUTn bit is
updated)
– The internal multiplexer is set to the next channel. After a time tOLONSW + tSYNCthe diagnosis is completed
(DIAG_OLON.OUTn bit is updated) for the currently selected channel. This step is repeated for all
remaining directly driven channels.
– If one channel is OFF when the diagnosis is performed, the corresponding DIAG_OLON.OUTn is set to
“0B
• Diagnosis sequence for channels driven by the internal PWM Generators (see Chapter 7.5)
– These channels are diagnosed only after all channels directly driven by micro-controller are checked
– Channels mapped to PWM Generator 0 are diagnosed first
–After a time tOLONSET the channel activation (switch ON) is the trigger event to perform Open Load at ON
diagnosis for the first channel
–After a time tONMAX + tOLONSW the diagnosis for the first channel is completed (DIAG_OLON.OUTn bit is
updated)
INn
ILn
t
OpenLoadON_direct.emf
OUT.OUTn
DIAG_OLONEN.MUX
1111
≠ 1111 (ch. n)
tON
t
t
tOLONSET
DIAG_OLON.OUTn
0
t
t
SPI readout of
DIAG_OLON.OUTn
1
0
1
IL(OL)
tOLONSW
tOLONSW


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