Author Topic: is it possible to remake this ic? (Read 4423 times)

wraper · « **Reply #25 on:** December 19, 2022, 02:12:43 pm »

Typical circuits are in the datasheet. Under question is if you should care about EN and PGOOD in particular TV circuit.

electricenthusiast · « **Reply #26 on:** December 19, 2022, 02:52:41 pm »

here it is
(see both images)

Mechatrommer · « **Reply #27 on:** December 19, 2022, 02:55:35 pm »

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)

electricenthusiast · « **Reply #28 on:** December 19, 2022, 02:59:39 pm »

yes, the tv set needs lx pin

electricenthusiast · « **Reply #29 on:** December 19, 2022, 03:03:33 pm »

PGOOD isn't connected anywhere but en is connected and it is going to the 3rd layer of pcb

wraper · « **Reply #30 on:** December 19, 2022, 03:03:41 pm »

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.

electricenthusiast · « **Reply #31 on:** December 19, 2022, 03:09:50 pm »

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)

electricenthusiast · « **Reply #32 on:** December 19, 2022, 03:33:12 pm »

EN pin goes to the main processor of the tv

Mechatrommer · « **Reply #33 on:** December 19, 2022, 03:47:40 pm »

Quote from: electricenthusiast on December 19, 2022, 03:09:50 pm

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.

wraper · « **Reply #34 on:** December 19, 2022, 03:49:58 pm »

You did not answer what is this?

wraper · « **Reply #35 on:** December 19, 2022, 03:52:57 pm »

Quote from: Mechatrommer on December 19, 2022, 03:47:40 pm

Quote from: electricenthusiast on December 19, 2022, 03:09:50 pm
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.

electricenthusiast · « **Reply #36 on:** December 19, 2022, 03:56:59 pm »

OH, that was a fuse. thanks for the reminder.

electricenthusiast · « **Reply #37 on:** December 19, 2022, 03:59:04 pm »

oof i was thinking abt it

Mechatrommer · « **Reply #38 on:** December 19, 2022, 04:05:18 pm »

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..

electricenthusiast · « **Reply #39 on:** December 19, 2022, 04:35:04 pm »

The ic dosen't heat up on regular working conditions but good advice

electricenthusiast · « **Reply #40 on:** December 19, 2022, 05:30:24 pm »

can i use this?

DavidAlfa · « **Reply #41 on:** December 19, 2022, 05:38:28 pm »

https://www.aliexpress.com/item/33050673895.html

wraper · « **Reply #42 on:** December 19, 2022, 05:39:39 pm »

Quote from: electricenthusiast on December 19, 2022, 05:30:24 pm

can i use this?

We need to know actual model, not a photo of backside.

DavidAlfa · « **Reply #43 on:** December 19, 2022, 05:45:53 pm »

Quote from: electricenthusiast on December 19, 2022, 05:30:24 pm

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.

macboy · « **Reply #44 on:** December 19, 2022, 11:54:50 pm »

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.

electricenthusiast · « **Reply #45 on:** December 20, 2022, 03:31:45 am »

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)

R-1125F · « **Reply #46 on:** December 20, 2022, 03:55:26 am »

Max Linear makes a very similar chip. Maybe you could adapt that.
See XR76208EL-F

https://www.digikey.com/en/products/detail/maxlinear-inc/XR76208EL-F/5231345

I don't think you will get very far if you try to make your own.

electricenthusiast · « **Reply #47 on:** December 20, 2022, 04:04:24 am »

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.

electricenthusiast · « **Reply #48 on:** December 20, 2022, 12:44:25 pm »

wait! no! there is no analog funtions. BTW thanks for suggesting

R-1125F · « **Reply #49 on:** December 20, 2022, 02:03:37 pm »

No analog functions? Look again.

There are many of the original chip AOZ1232QI-01 for sale on ebay. Try there.


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Author Topic: is it possible to remake this ic? (Read 4423 times)

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