™
PROFET + 24V
BTT6200-4ESA
Protection functions
Microcontroller
protection diodes
ZIS(AZ)
VS
ZD(AZ)
ZDS(AZ)
IS
RSENSE
VDS(REV)
DSEL0
DSEL1
RDSEL0
RDSEL1
RDEN
RIN
DEN
INx
LOGIC
-VS(REV)
I N 0
OUTx
ZDESD
GND
IS
RGND
L,RL
RIS
D
Reverse Polarity.vsd
Figure 18
Reverse polarity protection with external components
6.5
Overload protection
In case of overload, such as high inrush of cold lamp filament, or short circuit to ground, the BTT6200-4ESA
offers several protection mechanisms.
6.5.1
Current limitation
At first step, the instantaneous power in the switch is maintained at a safe value by limiting the current to the
maximum current allowed in the switch IL(SC). During this time, the DMOS temperature increases, which affects
the current flowing in the DMOS.
6.5.2
Temperature limitation in the power DMOS
Each channel incorporates both an absolute (TJ(SC)) and a dynamic (TJ(SW)) temperature sensor. Activation of
either sensor will cause an overheated channel to switch OFF to prevent destruction. Any protective switch OFF
latches the output until the temperature has reached an acceptable value which is depicted in Figure 19.
No retry strategy is implemented such that when the DMOS temperature has cooled down enough, the switch is
switched ON again. Only the IN pin signal toggling can re-activate the power stage (latch behavior).
Datasheet
23
Rev. 1.00
2019-03-09
INFINEON [ Infineon ]
