Greetings,
I have designed buck-boost converter with LM5177 using Excel tool (5V- up to 9.4A output, Vin 3-36V, up to 75V Transient)
The schematic and EMI filter schematic are attached.
I have a couple of questions as following
1-) In the EVK pin-8 and pin-9 connected to the ground. Shoud I connect them to the ground?
2-) I have added RC Snubber to low side drivers. In the EVK 680p + 3R was used but i have used 680p + 2.2R. Is it okay?
3-) Is there anything wrong in my circuit. Please advise me i can share Excel tool for this design.
4-) For compliance to automotive EMC test, is EMI filter needed? If so please see the attached draft i have used same inductor (2.2u) for filter, is it okay?
5-) For the output capacitors i have used X5R 22uf 10V capacitors since operating temperature range of these capacitors limitted to 85 degrees, is it okay to use them up to 70 degrees ambient temperature?
6-) For the Bootstrap capacitors at SW pins, can caps with a rating of 50V be used if input range is up to 75V?
7-) Should the current sense resistor(R65 2.2mOhm) be pulse withstanding? Is that part number okay(PML100HZPJV2L2)?
8-) In order to prevent reset during cold-cranking, should the output be connected to BIAS pin?
9-) When the LM5177 will be released?