TLE82453-3SA_15 Datasheet, PDF (35/71 Pages) Infineon Technologies AG – 3 Channel High-Side and Low-Side Linear Solenoid Driver IC

TLE82453-3SA
Protection Functions
9.3
Overtemperature Protection
A temperature sensor for each channel is used to switch off an overheated channel to prevent destruction. When
an overtemperature fault is detected, the channel is automatically turned off and the setpoints and EN bits of all
the overtemperature channels are cleared to 0, and the fault bit is latched in the DIAGNOSIS register. The channel
remains off until the channel temperature has decreased by the thermal hysteresis value ∆TSD. The channels will
remain disabled until the diagnostic register is read and the EN bit is set back to 1 and the setpoint is set to >0. A
fault bit is latched in the DIAGNOSIS register when the overtemperature fault is detected. The fault remains
latched until the DIAGNOSIS register has been read and the fault condition is no longer present.
JUNCTION
TEMP
Tj < OTSD
Tj > OTSD
Tj < OTSD
I_LOADx
V_LOADx
OTx
CSN
SI
SO
FAULTN
(FMx = 1)
DIAG-
NOSIS
DIAG-
NOSIS
OTx = 0
DIAG- DIAG-
NOSIS NOSIS
DIAG- DIAG-
NOSIS NOSIS
OTx=1 OTx=1
DIAG- DIAG-
NOSIS NOSIS
I > 0ma
DIAG- DIAG-
NOSIS NOSIS
OTx=1 OTx=0
Figure 15 Overtemperature Timing Diagram (High-Side Configuration)
Data Sheet
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35
Rev 1.0, 2015-03-27