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TLE75602-ESD データシート(PDF) 45 Page - Infineon Technologies AG

部品番号 TLE75602-ESD
部品情報  SPI Driver for Enhanced Relay Control
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メーカー  INFINEON [Infineon Technologies AG]
ホームページ  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

TLE75602-ESD データシート(HTML) 45 Page - Infineon Technologies AG

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Datasheet
45
Rev. 1.0
2017-11-23
TLE75602-ESD
SPIDER+ 12V
Diagnosis
9
Diagnosis
The SPI of TLE75602-ESD provides diagnosis information about the device and the load status. Each channel
diagnosis information is independent from other channels. An error condition on one channel has no
influence on the diagnostic of other channels in the device (unless configured to work in parallel, see
Chapter 7.3 for more details).
9.1
Over Load and Over Temperature
When either an Over Load or an Over Temperature occurs on one channel, the diagnosis bit ERRn is set
accordingly. As described in Chapter 8.1 and Chapter 8.2, the channel latches OFF and must be reactivated
setting corresponding HWCR_OCL.OUTn bit to “1”.
9.2
Output Status Monitor
The device compares each channel VDS with VDS(OL) (Low-Side channels and auto-configurable channels used
as Low-Side switches), VOUT_S with VOUT_S(OL) (auto-configurable channels used as High-Side)and sets the
corresponding DIAG_OSM.OUTn bits accordingly. The bits are updated every time DIAG_OSM register is
read.
• VDS < VDS(OL) → DIAG_OSM.OUTn = “1” (Low-Side channels and auto-configurable channels as Low-Side)
• VOUT_S > VOUT_S(OL) → DIAG_OSM.OUTn = “1” (auto-configurable channels as High-Side)
A diagnosis current IOL in parallel to the power switch can be enabled by programming the DIAG_IOL.OUTn
bit, which can be used for Open Load at OFF detection. Each channel has its dedicated diagnosis current
source. If the diagnosis current IOL is enabled or if the channel changes state (ON → OFF or OFF → ON) it is
necessary to wait a time tOSM for a reliable diagnosis. Enabling IOL current sources increases the current
consumption of the device. Even if an Open Load is detected, the channel is not latched OFF.
See Figure 22 for a timing overview (the values of DIAG_IOL.OUTn refer to a channel in normal operation
properly connected to the load).
Figure 22 Output Status Monitor timing
Output Status Monitor diagnostic is available when VS = VS(NOR) and VDD ≥ VDD(UV).
INn
t
OutStatMon_timings.emf
OUT.OUTn
1
t
tON + tOSM
DIAG_OSM.OUTn
0
t
x
t
SPI readout of
DIAG_OSM.OUTn
1
0
0
Output voltage
comparator
tOFF + tOSM
x
0
x
x


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