BTF50060-1TEA_11 Datasheet, PDF (17/38 Pages) Infineon Technologies AG – Smart High-Side Power Switch, One Channel

BTF50060-1TEA
Functional Description
5.3.2 Protection by Over Temperature Shutdown
The internal logic permanently monitors the junction temperature of the output stage. In the event of an over
temperature (T_j > T_jt) the output will immediately switch OFF with a latching behavior, see Chapter 5.3.3 for
details.
5.3.3
Infineon^® INTELLIGENT LATCH
The BTF50060-1TEA provides Infineon^® INTELLIGENT LATCH to avoid permanent resetting of a protective,
latched switch OFF caused by over current shutdown or over temperature shutdown) in PWM applications. To
reset a latched protective switch OFF the fault has to be acknowledged by commanding the input LOW for a
minimum duration of t_reset. See Figure 16 for details.
V_IN
over temperature /
short circuit
V_OUT
I_IS
I_{IS (fault )}
t_RESET
t_RESET
t
t
t
I_IS(OFFSET)
latch
reset
latch
Figure 16 Infineon^® INTELLIGENT LATCH - fault acknowledge and latch reset
reset ^t
INTELLIGENTLATCH.emf
5.3.4 Reverse Polarity Protection
Reverse polarity condition is the mix-up of the power supply connections of the entire application. This means,
application GND connector is connected to positive supply voltage, while Vs pin is connected to negative supply
voltage or ground potential. See Figure 17 and Figure 45.
-V_S(rev)
-I_IN R_INPUT
R_SENSE
R_IS
GND
V_S
-I_L
OUT
Figure 17 Reverse polarity condition
Datasheet
17
Speed PROFET^TM
Re ve r s.e m f
Rev. 1.2, 2011-09-01