is it possible to remake this ic? - Page 1
Forum section: electronics / beginners

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 10:17:49 am
content: im been trying out how to remake this ichttps://www.digikey.in/en/products/detail/alpha-omega-semiconductor-inc/AOZ1232QI-01/3152689.It is a synchronization ic with stepdown features and many more things. It is taken from a tv set (Sony - KDL32w600a) The tv dosen't work without it. is it possible to remake this ic because it is not avalable anywhere.

author: Kalvin
author_rank: Super Contributor
timestamp: December 19, 2022, 10:26:32 am
content: You might be able to find a complete replacement module. Just googleSony KDL32w600a partsor something like that.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 10:28:05 am
content: no, it is a part from main motherboard

author: Kalvin
author_rank: Super Contributor
timestamp: December 19, 2022, 10:38:20 am
content: Check Octopart:https://octopart.com/aoz1232qi-01-alpha+%26+omega+semiconductor-22386093There might be some sellers that have that part you are looking for in decent price point.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 10:39:47 am
content: nope, there isn't

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 10:46:15 am
content: Just buy it from Aliexpress o UTsource.

author: Kalvin
author_rank: Super Contributor
timestamp: December 19, 2022, 10:46:27 am
content: Quote from: electricenthusiast on December 19, 2022, 10:39:47 amAre you really sure? Take a look again at the link I provided, and expand the "Non-Authorized Stocking Distributors" list.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 10:47:58 am
content: i mean it is not transporting to my country (india) and aliexpress is banned in my country

author: tooki
author_rank: Super Contributor
timestamp: December 19, 2022, 10:52:56 am
content: Quote from: electricenthusiast on December 19, 2022, 10:47:58 amThen change your location flag to India so people know that you’re not in France.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 10:54:21 am
content: oops i forgot it thanks buddy

author: Kalvin
author_rank: Super Contributor
timestamp: December 19, 2022, 10:57:20 am
content: Quote from: electricenthusiast on December 19, 2022, 10:47:58 amIf you know someone in Europe, or in any other country they are shipping, then just set the shipping address to that person, and ask that person to forward your parcel to you in India.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 11:03:09 am
content: but i don't know any one outside my country

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 11:05:02 am
content: i just need a remake

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 11:07:56 am
content: Quote from: electricenthusiast on December 19, 2022, 11:05:02 amWhat do you mean by remake? Make a new IC?BTW I just checked and Aliexpress allows me to use shipping address in India. Seems it's only Aliexpress app that is banned in India.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 11:09:35 am
content: no, i mean reverse engineering the chip using buckconverter and some 555 timers and it is a bad thing all chinese online electric shops are banned in my country bcoz of stupid government policies

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 11:18:01 am
content: Using 555 for this is nonsense. All you need is a buck converter module based on IC that has enable input and power good output. Or probably you don't even need those as they may be actually not used in circuit.

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 11:21:06 am
content: Quote from: electricenthusiast on December 19, 2022, 11:09:35 amIf you can receive packages from China at all, I don't see a problem. Your government has no way to know you ordered it from Aliexpress since it will be dispatched by actual seller. As Aliexpress allows shipping to India I assume it's possible to order and receive the part. Worst case you can order to US for example and use mail forwarding service.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 11:30:02 am
content: the result after reverse engineering. but i don't know how remake the ss, ton pins in the ic

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 11:44:15 am
content: According to this Enable input is NC which is not likely as datasheet does not say it has any pull-up built in. But PGOOD output is connected to VCC and LX which is a 100% mistake. Another mistake is that a BST pin is NC but it does not matter for a purpose of using bodge wired buck converter module.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 01:51:41 pm
content: yes, nc pin isn't on datasheet but, when i use a buck converter, they don't need to be used?

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 01:52:31 pm
content: Quote from: electricenthusiast on December 19, 2022, 01:51:41 pmYou marked pins which must be used as NC. Your reverse engineering has several errors. Depending on how EN and PGOOD pins are used you might only need to connect input, output (after inductor in this circuit) and GND of the module.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 01:55:23 pm
content: i conected pgood to lx because pgood pin is used to ensure if there is an output after stepdown. So, isn't it right?

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 01:58:04 pm
content: PGOOD is an output indicating that output voltage is ok. If used, it's usually a signal that power has stabilized and powered circuit can start safely.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 02:01:26 pm
content: can you reverse engineer and solve errors of schematic? thanks.

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 02:08:30 pm
content: Quote from: electricenthusiast on December 19, 2022, 02:01:26 pmHow can I reverse engineer when I don't have a photo of the circuit?

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 02:12:43 pm
content: Typical circuits are in the datasheet. Under question is if you should care about EN and PGOOD in particular TV circuit.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 02:52:41 pm
content: here it is(see both images)

author: Mechatrommer
author_rank: Super Contributor
timestamp: December 19, 2022, 02:55:35 pm
content: 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)

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 02:59:39 pm
content: yes, the tv set needs lx pin

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 03:03:33 pm
content: PGOOD isn't connected anywhere but en is connected and it is going to the 3rd layer of pcb

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 03:03:41 pm
content: 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.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 03:09:50 pm
content: 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)

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 03:33:12 pm
content: EN pin goes to the main processor of the tv

author: Mechatrommer
author_rank: Super Contributor
timestamp: December 19, 2022, 03:47:40 pm
content: Quote from: electricenthusiast on December 19, 2022, 03:09:50 pmno! 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.

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 03:49:58 pm
content: You did not answer what is this?

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 03:52:57 pm
content: Quote from: Mechatrommer on December 19, 2022, 03:47:40 pmThe 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.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 03:56:59 pm
content: OH, that was a fuse. thanks for the reminder.

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 03:59:04 pm
content: oof i was thinking abt it

author: Mechatrommer
author_rank: Super Contributor
timestamp: December 19, 2022, 04:05:18 pm
content: 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..

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 04:35:04 pm
content: The ic dosen't heat up on regular working conditions but good advice

author: electricenthusiast
author_rank: Contributor
timestamp: December 19, 2022, 05:30:24 pm
content: can i use this?

author: DavidAlfa
author_rank: Super Contributor
timestamp: December 19, 2022, 05:38:28 pm
content: https://www.aliexpress.com/item/33050673895.html

author: wraper
author_rank: Unknown
timestamp: December 19, 2022, 05:39:39 pm
content: Quote from: electricenthusiast on December 19, 2022, 05:30:24 pmWe need to know actual model, not a photo of backside.

author: DavidAlfa
author_rank: Super Contributor
timestamp: December 19, 2022, 05:45:53 pm
content: Quote from: electricenthusiast on December 19, 2022, 05:30:24 pmThat'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.

author: macboy
author_rank: Super Contributor
timestamp: December 19, 2022, 11:54:50 pm
content: 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.

author: electricenthusiast
author_rank: Contributor
timestamp: December 20, 2022, 03:31:45 am
content: 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)

author: R-1125F
author_rank: Regular Contributor
timestamp: December 20, 2022, 03:55:26 am
content: Max Linear makes a very similar chip. Maybe you could adapt that.See XR76208EL-Fhttps://www.digikey.com/en/products/detail/maxlinear-inc/XR76208EL-F/5231345I don't think you will get very far if you try to make your own.

author: electricenthusiast
author_rank: Contributor
timestamp: December 20, 2022, 04:04:24 am
content: 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.

author: electricenthusiast
author_rank: Contributor
timestamp: December 20, 2022, 12:44:25 pm
content: wait! no! there is no analog funtions. BTW thanks for suggesting

author: R-1125F
author_rank: Regular Contributor
timestamp: December 20, 2022, 02:03:37 pm
content: No analog functions? Look again.There are many of the original chip AOZ1232QI-01 for sale on ebay. Try there.

author: Mechatrommer
author_rank: Super Contributor
timestamp: December 20, 2022, 02:07:29 pm
content: yes this guy sells it..https://www.ebay.com/itm/154709927060

author: MrAl
author_rank: Super Contributor
timestamp: December 20, 2022, 03:33:17 pm
content: Quote from: electricenthusiast on December 19, 2022, 10:17:49 amThis is strange i got a 404 page not found error when i clicked that link. It went to Digikey ok but the page was not found.Can you provide a new link? Or a part number?

author: wraper
author_rank: Unknown
timestamp: December 20, 2022, 03:45:00 pm
content: Quote from: MrAl on December 20, 2022, 03:33:17 pmThere is an extra dot added on the end of the link.

author: Jwillis
author_rank: Super Contributor
timestamp: December 20, 2022, 05:04:08 pm
content: Digikey shows a substitute forhttps://www.digikey.com/en/products/detail/alpha-omega-semiconductor-inc/AOZ1232QI-01/3152689#product-details-substitutesUsehttps://www.digikey.com/en/products/detail/alpha-omega-semiconductor-inc/AOZ1266AQI/16262228

author: wraper
author_rank: Unknown
timestamp: December 20, 2022, 05:28:40 pm
content: Quote from: Jwillis on December 20, 2022, 05:04:08 pmIt's not a direct substitute, different package size and pin order, requires changes in PCB.

author: electricenthusiast
author_rank: Contributor
timestamp: December 21, 2022, 04:30:42 am
content: OMG you saved my day. i appreciate it. But it may take 2 months to get it in my country. So can you give me a simple solution using buck converter with en pin? Because, now here it is christmas and got some holiday and i want to do within time and when the time i get this ic, i maybe super busy..... anyway the ic still exist.