TLE8102SG_12 Datasheet, PDF (13/34 Pages) Infineon Technologies AG – Smart Dual Channel Powertrain Switch

TLE 8102 SG
Smart Dual Channel Powertrain Switch
Electrical and Functional Description of Blocks
OVL
OVL
Condition
IN
I_{D(lim 2)}
I_{OUT Inom}
V_Bat
ON
OFF
ILIM2 Failure
latched
t_{d(off) shutdown}
ILIM2 Failure
latched
t_{d(off) shutdown}
V_{OUT I*RON}
ST
set
reset
set
FAULT
SO
HH
set _HL
(Normal Function) (OVL)
CS
reset
HH
HL
reset
Valid SPI cycles
ILIM2 Failure
latched
t_{d(off) shutdown}
HH
HL
HH
Figure 10 Over Load Behavior - Latched Shutdown (current limit 2)
OL_CurrLim2.vsd
5.3.3.2 Over Temperature Protection
A dedicated temperature sensor for each channel detects if the temperature of its channel exceeds the over
temperature shutdown threshold. If the channel temperature exceeds the over temperature shutdown threshold,
the overheated channel is switched off immediately to prevent destruction. At the same time (no delay), the over
temperature flag Tn is set. If the status outputs are used for diagnosis, the over temperature flag is cleared
immediately after the over temperature condition is no longer present. If using the SPI interface and fault pin for
diagnosis, the over temperature flag of the affected channel is cleared by the rising edge of the CS signal after a
successful SPI transmission.
The restart response of the channel can be programmed via SPI. If automatic autorestart is selected, after cooling
down, the channel is switched on again with thermal hysteresis ΔT_j. If latching shutdown is selected, the channel
remains switched off even after cooling down. The channel can be restarted only if first turned off with either the
parallel input or SPI. In addition, the channel must first be turned off before the the over temperature flag of the
affected channel can be cleared by the rising edge of the CS signal after a successful SPI transmission.
For timing information, please refer to Figure 11 and Figure 12 for details.
Data Sheet
13
V1.5, 2012-08-17