Hi, I need to design the power supply according to the given circuit diagram.
Please help me with this.
Please find the hand drawn circuit diagram in the attachments.
Thanks and Regards,
Abhishek Duivedi
Hi Abhishek,
Using PFET, R113and D101 looks like you are trying to achieve input reverse polarity protection. You can replace your circuit with LM74500-Q1 + NFET to achieve small solution size and better cold crank performance. For more understanding, please refer to section '2 Reverse Battery Protection' of Basics of Ideal Diodes Application note.
Hi Abhishek,
Looks like the attachment you have shared did not come through. Please share it again using Insert--> Image/video/file option.
From your description it is understood that you need Priority power Muxing. Please refer to section '9.5 Priority Power MUXing' of TPS25947 Datasheet.
TPS25947 can handle voltages up to 23V and 5.5A through it. Can you let us know the Battery Voltage, external supply voltage and the max load current in each path so that I will be able to propose the right device.
Hi Praveen,
Actually I was trying to implement this circuit, In this I am planning to turn off the battery supply automatically whenever external supply on is detected and to apply that I have tried to make this logic. Can you please help me with the design part. I have also attached the image for for better understanding.
Above figure is the hand drawn schematic for the application. Please help with the application part.
Thanks and Regards,
Abhishek Duivedi
Hi Abhishek,
You will need to use 2x LM74800-Q1 in priority power mux configuration as shown below for your application.
For more understanding on this topic please refer to section '' of Six System Architectures With Robust Reverse Battery Protection Using an Ideal Diode Controller Application note.
