™
PROFET + 24V
BTT6200-4ESA
Protection functions
VOUT
undervoltage behavior.vsd
VS
VS(UV)
VS(OP)
Figure 16
Undervoltage behavior
6.3
Overvoltage protection
There is an integrated clamp mechanism for overvoltage protection (ZD(AZ)). To guarantee this mechanism
operates properly in the application, the current in the Zener diode has to be limited by a ground resistor.
Figure 17 shows a typical application to withstand overvoltage issues. In case of supply voltage higher than
VS(AZ), the power transistor switches ON and in addition the voltage across the logic section is clamped. As a
result, the internal ground potential rises to VS - VS(AZ). Due to the ESD Zener diodes, the potential at pin INx,
DSELx, and DEN rises almost to that potential, depending on the impedance of the connected circuitry. In the
case the device was ON, prior to overvoltage, the BTT6200-4ESA remains ON. In the case the BTT6200-4ESA was
OFF, prior to overvoltage, the power transistor can be activated. In the case the supply voltage is in above
VBAT(SC) and below VDS(AZ), the output transistor is still operational and follows the input. If at least one channel
is in the ON state, parameters are no longer guaranteed and lifetime is reduced compared to the nominal supply
voltage range. This especially impacts the short circuit robustness, as well as the maximum energy EAS
capability. ZGND is recommended to be a resistor in series to a diode.
Datasheet
21
Rev. 1.00
2019-03-09
INFINEON [ Infineon ]
