I am working on an automotive scan tool that will not power up. There is no schematic so I am working blind. I have found the LTC4412 PowerPath controller and have voltage from the battery (pin 1- 9.27VDC) and the AC adapter(pin 6-14.90VDC). I am not sure which pin is the output pin but I have 0V on pins 2 and 4, 7V on pin 3 and 14.79V on pin 5. My first question would be what voltage should I expect and what pin should be the output?
https://www.analog.com/media/en/technical-documentation/data-sheets/4412fb.pdf
My second question has to do with the voltage regulator MP2467DN. I have 14.9 VDC at pin 7 (Vin) and my ground at pin 5 is good. I have no output at pin 1. Is there anything else needed by the regulator to turn on and output a voltage? I am thinking it should be 3.3VDC. I have a 10uH inductor right beside it.
I have no Vdd at my microcontroller.
https://www.mouser.ca/datasheet/2/277/MP2467-1368026.pdf
If I disconnect the AC adapter, I do not see battery voltage at pin 7 of the regulator.
This scan tool should power up through the OBDII connector, the AC adapter or the battery. The adapter takes precedence over the battery.
Any suggestions?
https://www.analog.com/media/en/technical-documentation/data-sheets/4412fb.pdf
My second question has to do with the voltage regulator MP2467DN. I have 14.9 VDC at pin 7 (Vin) and my ground at pin 5 is good. I have no output at pin 1. Is there anything else needed by the regulator to turn on and output a voltage? I am thinking it should be 3.3VDC. I have a 10uH inductor right beside it.
I have no Vdd at my microcontroller.
https://www.mouser.ca/datasheet/2/277/MP2467-1368026.pdf
If I disconnect the AC adapter, I do not see battery voltage at pin 7 of the regulator.
This scan tool should power up through the OBDII connector, the AC adapter or the battery. The adapter takes precedence over the battery.
Any suggestions?