BTS54040-LBA Datasheet, PDF (66/69 Pages) Infineon Technologies AG – CMOS compatible parallel input pins for four channels

BTS54040-LBA
Application Description
Table 15 Suggested Component Values
Reference
Value
Purpose
R_VDD
R_IN
500 Ω
8 kΩ
Device logic protection (Size 1206 recommended)
Protection of the µC during overvoltage, reverse polarity and
loss of ground
R₁
4.7 kΩ
Protection resistor for overvoltage, reverse polarity and loss
of ground. Value to be tuned with µC specification
R_IS
R_ADC
R_CS
R_SCLK
R_SO
R_SI
R_LHI
C_ADC
C_VDD
C_VS1
C_VS2
C_OUT
C_GND
2.7 kΩ
1 kΩ
3.9 kΩ
3.9 kΩ
3.9 kΩ
3.9 kΩ
8 kΩ
1 nF
100 nF
68 nF
100 nF
10 nF
8.2 nF
Sense resistor
µC-ADC voltage spikes filtering
Protection of the µC during overvoltage and reverse polarity
Protection of the µC during overvoltage and reverse polarity
Protection of the µC during overvoltage and reverse polarity
Protection of the µC during overvoltage and reverse polarity
Protection of the µC during overvoltage and reverse polarity
µC-ADC voltage spikes filtering
Logic supply voltage spikes filtering
Battery voltage spikes filtering
Battery voltage spikes filtering
For improved electromagnetic compatibility (EMC)
Ground voltage spikes filtering (optional for improved
robustness against battery voltage transients)
R_GND
100 Ω
Ground voltage spikes filtering (optional for improved
robustness against battery voltage transients)
R_REC
1 kΩ
Ground voltage recycling path (optional for providing a
recycle path in case of loss of Battery)
Z₁
Z₂
D_GND
7V
P6SMB30
BAS70
Protection of µC during overvoltage. Zener diode
Protection of device during overvoltage. Zener diode
Protection of device during reverse polarity. Schottky diode
Data Sheet
66
Rev. 2.0, 2014-05-26