TLE8108EM Infineon Technologies, TLE8108EM Datasheet - Page 18

• Manufacturer Part Number: TLE8108EM
• Manufacturer: Infineon Technologies

Specifications of TLE8108EM

• Packages: PG-SSOP-24
• Thermal Class: Exposed Pad
• Id Nom: 8 x 0.5 A
• Pin Count: 24.0 Pins
• Channels: 8.0
• Comment: 8 channel realy and LED driver

7
The SPI of TLE8108EM provides diagnosis information about the device and about the load. The following
diagnosis states are implemented:
•
•
•
•
In Clear mode (CLR) there is no diagnostic function.
For each output channel there are 2 bits in the diagnosis register coding the different failures; Refer to
for encoding details.
A short circuit to ground (SCG) will overwrite an open load (OL), but an open load (OL) will not overwrite a short
circuit to ground (SCG). In order to detect an open load (OL) after a short circuit to ground (SCG), the output has
to be programmed in Clear mode and again in either OFF mode or input mode with low input level.
Failure Mode
Open load or short circuit
to ground
Data Sheet
Short circuit to battery (SCB): Can be detected if stages are turned on
Short circuit to ground (SCG): Can be detected if stages are turned off (channel either in OFF or in input mode
with the dedicated input low)
Open load (OL): Can be detected if stages are turned off (channel either in OFF or in input mode with dedicated
input low)
Diagnosis of Overtemperature (DOT): Is set in case the thermal shut down temperature
output is turned on (either ON-state or input mode and channel turned on via parallel INx). In case the thermal
shut down temperature
can only be switched on again after a Clear mode is programmed, the temperature got below the shut down
threshold and the clamping has vanished. In case the thermal shut down temperature
state without clamping, there is no diagnosis entry and the channel can be switched on again after the thermal
shut down temperature
Diagnosis Features
Comment
•
•
•
•
T
T
No diagnosis when channel
in input mode and corresponding input signal is H)
No diagnosis when channel
Diagnosis when channel
According to the voltage level at the output pin, the corresponding failure is latched
into the diagnosis register after the filtering time
Diagnosis when channel
pin, the corresponding failure is latched into the diagnosis register after the filtering
time
j(SC)
j(SC)
is reached during clamping in OFF state, DOT is set and the dedicated channel
falls below the threshold.
t
d
has expired.
n
n
18
is in input mode and corresponding input signal is L:
is in OFF mode: According to voltage level at the output
n
n
is switched on (either channel in ON mode or channel
is in Clear mode
Smart 8-Channel Low Side Switch
t
d
has expired.
T
j(SC)
T
Rev. 1.0, 2011-03-23
Diagnosis Features
j(SC)
is reached in OFF
is reached, if the
TLE 8108 EM
Chapter 8.3