I’m working on a custom board and adding support for HDMI. I’ve used the P2597 B02 Schematic as a reference (Thanks for this!) and I have a question about component U502 on page 14 location B1. Specifically about the IC :RT9728A Datasheet: http://www.richtek.com/assets/product_file/RT9728A/DS9728A-06.pdf
The function of the fault pin is to pull the enable signal low when an overcurrent condition occurs. On this schematic the connection between the FAULT# and EN is tied together through a 0 ohm resistor.
The datasheet says (page 10):
“… The FAULT pin requires a pull-up resistor; this resistor should be large in value to reduce energy drain. A 100kΩ pull-up resistor works well for most applications. …”
It seems like the implementation is incorrect.
Am I not noticing something?