Hi Team,
Could you help review the LM74900-Q1 input path schmatic LM74900-Q1.pdf
The is Infotainment for automotive for using Or-ing, Reverse current blocking, Reverse polarity protection, Overcurrent Protection
Vin 1 & 2 = 12V DC
Load Current = 4.5A at 12V DC
Revers polarity protection test voltage= -14V
Load Dump Vmax 32V, tr:300ms,Interval:60s with the 10 Cycle
Hi Sekhar,
Please see my schematic review comments below,
1. Change the input TVS from TPSMC27CA to TPSMC36A. The breakdown voltage of the TVS has to be > 35V which is the suppressed load dump voltage.
2. VS pin provides power supply to the internal circuits of the IC. Add a 0.1uF capacitor from VS to GND as it helps in EMI performance as well.
3. For passive component values selection/verification, please use the attached design calculator.
2577.LM749X0_ID_Design_Calculator.XLSX
4. In case filtering is required for SCP and OCP, add capacitors across ISCP to CS- and CS+ to CS- as shown below.
