Typical circuits are in the datasheet. Under question is if you should care about EN and PGOOD in particular TV circuit.
its just a buck converter with few bell and whistle (which probably not used, or easily emulated), make a floating pcb and dead bug wiring with other buck converter ic or controller + mosfet and all.. i guess the most important will be output voltage that the tv needs (LX pin)
yes, the tv set needs lx pin
PGOOD isn't connected anywhere but en is connected and it is going to the 3rd layer of pcb
PGOOD pin looks unused, so you don't need that. EN goes to somewhere where photo is not clear and components are missing. Looks like you will need enable input functionality in replacement module. Also looks like you soldered a bodge wire between two different power rails which shouldn't be connected.
the components aren't missing, i just removed the chip. so it feels like componenets are missing. So you are saying i can short en pin to input of the ic? (19.5v)
EN pin goes to the main processor of the tv
So you are saying i can short en pin to input of the ic? (19.5v)
no! EN is input for the ic, ie output from main processor.. if you connect EN to 19.5v, there is good chance you fry the tv processor. EN is to switch LX on or off, you can make mosfet switch to on off input voltage (IN) to emulate the functionality..ymmv.
You did not answer what is this?
So you are saying i can short en pin to input of the ic? (19.5v)
no! EN is input for the ic, ie output from main processor.. if you connect EN to 19.5v, there is good chance you fry the tv processor. EN is to switch LX on or off, you can make mosfet switch to on off input voltage (IN) to emulate the functionality..ymmv.
The best would be to simply use a module with EN input or at least a module with IC that has such an input and bodge a wire to it.
OH, that was a fuse. thanks for the reminder.
oof i was thinking abt it
another thing, the IC is a 6A buck, so its not the jellybean cheap type. probably heat is one issue. with original ic, heat can dissipate through bottom/heat pad as shown in picture, with bodge wiring and external module that cant/incompatible with original footprint, this issue must be carefully observed, extra heatsink if necessary, fwiw..
The ic dosen't heat up on regular working conditions but good advice
can i use this?
We need to know actual model, not a photo of backside.
can i use this?
That's the common MP2315-based 3A module:
The original IC is designed for 6A continuous, there's too much difference, I doubt it will be able to handle the current without overloading.
Do you have the service manual of the TV? Sony actually makes very good service manuals with schematics and I.C. block diagrams. You might even get typical waveforms and DC voltage levels for some of the pins.
i got the schematic (see :https://elektrotanya.com/sony_kdl-32w600a_kdl-32w603a_kdl-32w605a_kdl-32w607a_kdl-32w650a_kdl-32w651a_kdl-32w653a_kdl-32w654_kdl-32w655_kdl-32w658_kdl-32w670_kdl-42w674a_chassis_rb1g.pdf/download.html . as i couldn't post because it is a big pdf) but there is no block diagram of the ic. See board BKJ, BKE and BKX (side a)
There are some extra pins like ILIM, PVIM. Im new to those Buck ics and i don't know how to match that ic with my board.
wait! no! there is no analog funtions. BTW thanks for suggesting
No analog functions? Look again.
There are many of the original chip AOZ1232QI-01 for sale on ebay. Try there.