BTS5180-2EKA_11 Datasheet, PDF (37/54 Pages) Infineon Technologies AG – Smart High-Side Power Switch

8
Input Pins
BTS5180-2EKA
Input Pins
8.1
Input Circuitry
The input circuitry is compatible with 3.3 and 5 V microcontrollers. The concept of the input pin is to react to voltage
thresholds. An implemented Schmidt trigger avoids any undefined state if the voltage on the input pin is slowly
increasing or decreasing. The output is either OFF or ON but cannot be in a linear or undefined state. The input
circuitry is compatible with PWM applications. Figure 28 shows the electrical equivalent input circuitry. In case the
pin is not needed, it must be left opened, or must be connected to device ground (and not module ground) via a
4.7kΩ input resistor.
IN
GND
Input circuitry.vsd
Figure 28 Input Pin Circuitry
8.2
DEN / DSEL Pin
The DEN / DSEL pins enable and disable the diagnostic functionality of the device. The pins have the same
structure as the Input pins, please refer to Figure 28.
8.3
Input Pin Voltage
The IN, DSEL and DEN use a comparator with hysteresis. The switching ON / OFF takes place in a defined region,
set by the thresholds V_IN(L) Max. and V_IN(H) Min. The exact value where the ON and OFF take place are unknown
and depends on the process, as well as the temperature. To avoid cross talk and parasitic turn ON and OFF, a
hysteresis is implemented. This ensures a certain immunity to noise.
Data Sheet
PROFET™+ 12V
37
Rev. 2.1, 2011-09-01