Can you help me to identify this ic  - Page 1
Forum section: electronics / repair

author: lloll
author_rank: Newbie
timestamp: January 28, 2018, 10:40:37 am
content: https://www.dropbox.com/s/f7fh9ewc1xupewg/Photo%201-27-18%2C%209%2042%2013%20PM.jpg?dl=0

author: chris_leyson
author_rank: Super Contributor
timestamp: January 28, 2018, 11:05:32 am
content: It's a microwave oven controller board, what's the make and model number of the microwave oven ? A picture of the back of the board would help identify the pin functions and it's most likely going to be a Sanken part STR-A6000 series, pinout doesn't match Power Integrations topswitch or linkswitch parts, On Semi NCP107X and Dialog iW1818 would also match the pinout but highly unlikely. For that to happen to the flyback controller there are probably one or more failed parts on the underside of the board. Also, judging by the state of the relay contacts there has been some condensation build up at some time.

author: chris_leyson
author_rank: Super Contributor
timestamp: January 28, 2018, 07:57:34 pm
content: On second thoughts it's unlikely to be any of the parts I mentioned, there is no "Vcc" cap for the controller, usually a 22uf or 47uF 50V electrolytic and I don't they would have fitted it on the bottom of the board. I can't think of anymore manufacturers of DIP8 flyback controllers. Also, there is no common mode choke, just L101, and no X or Y caps anywhere maybe the main EMC filter is on another PCB but I somehow doubt it as there isn't a Y cap across the transformer, all I can see are two snubber caps (blue).

author: tpowell1830
author_rank: Frequent Contributor
timestamp: January 28, 2018, 08:34:56 pm
content: Since the blown part appears to be a 3 pin device, my guess is a voltage regulator, WAG.

author: chris_leyson
author_rank: Super Contributor
timestamp: January 28, 2018, 08:49:05 pm
content: I can see seven pins, 8 pin DIP with pin 6 missing. It's a flyback controller for some microwave oven board. Look again

author: Armadillo
author_rank: Super Contributor
timestamp: January 28, 2018, 08:56:33 pm
content: Could be a linkswitch offline switcher LNK306P. Not sure. Better to photo the PCB copper track side to be certain.

author: tpowell1830
author_rank: Frequent Contributor
timestamp: January 28, 2018, 08:59:12 pm
content: Ok, that's interesting, I see legs 1 through 4 all common as well as legs 7 and 8.Hmm, maybe I am seeing things that are not there? Can you confirm?EDIT: Had pin numbers reversed, corrected.

author: chris_leyson
author_rank: Super Contributor
timestamp: January 28, 2018, 09:04:03 pm
content: Don't think it's a Linkswitch, they have pin 3 missing if it's in a DIP8 package. Sanken STR-A6000 series has pin 6 missing so it fits the package but there is no Vcc cap. Can't think of any other Japanese manufacturers, maybe it's Chinese and if that's the case I wouldn't know where to begin looking.

author: chris_leyson
author_rank: Super Contributor
timestamp: January 28, 2018, 09:07:11 pm
content: QuoteThat would help fill in a few of the missing pieces. Make and model number for the oven might help as well.

author: Armadillo
author_rank: Super Contributor
timestamp: January 28, 2018, 09:08:22 pm
content: Pin 6

author: Armadillo
author_rank: Super Contributor
timestamp: January 28, 2018, 09:28:20 pm
content: LNK306P or NCP1015 1060 1063 series;

author: chris_leyson
author_rank: Super Contributor
timestamp: January 28, 2018, 10:07:18 pm
content: Thanks Armadillo I got that Linkswitch part pinout wrong, and the On Semi part fits as well but there's no Vcc cap on the PCB.It's a Panasonic oven or designed by Panasonic and re-badged, it looks like it was designed in Japan, it doesn't look anything like the UK designed oven controllers. It's most probably a Panasonic flyback controller and these parts look like they are possible candidatesMIP2E1DMTSCF, MIP2E2DMTSCF, MIP2E3DMTSCF, MIP2E4DMTSCFMIP2L30MTSCF, MIP2L40MTSCFThey're all 3-pin controllers, pins 1,2,3,7,8 Source, pin 5 Drain and Pin 4 control. No Vcc cap needed and the PCB layout fits the part nicely. So tpowell1830 was right, it is 3-pin.

author: Armadillo
author_rank: Super Contributor
timestamp: January 28, 2018, 10:20:51 pm
content: Is a Chinese transformer.

author: zvonex66x
author_rank: Contributor
timestamp: January 28, 2018, 10:32:27 pm
content: This is lnk306 or tny264

author: chris_leyson
author_rank: Super Contributor
timestamp: January 28, 2018, 10:34:15 pm
content: Quotemaybe Dongguan Dazhong Electronics Co. Yes the boards are manufactured in China, and the quality is pretty good too.

author: zvonex66x
author_rank: Contributor
timestamp: January 28, 2018, 10:37:40 pm
content: Quote from: zvonex66x on January 28, 2018, 10:32:27 pmAnd do not forget to change inductor L101 and serial resistor 3w

author: chris_leyson
author_rank: Super Contributor
timestamp: January 28, 2018, 10:54:31 pm
content: Quotecould very well be but we won't know until we see the underside of the board are there 4 pins used or 3 pins ? Panasonic used a lot of their own ICs if the boards were designed in Japan.QuoteL101 is not a 2k2 resistor, I know some asian people have trouble pronouncing L and R but CAD packages don't have that troubleIt's probably 2u2 fitted between the two primary caps to help with EMC. Where would you fit a 2k2 resistor in a <10W flyback anyway ? Not as a dropper it would be pointless and not in a primary snubber network either, look at the layout.@lloll, please take a picture of the underside of the board, that would be a great help in identifying the chip. Also there will be a part number on the board somewhere and that might make it a little bit easier to trace. Also oven make and model number please.I could be wrong, it might not be a Panasonic manufactured oven controller but it has the same style as the newer Panasonic boards. The silk screen is definately Japanese just look at the little details. A lot of design features and design practices that work well get carried through generations and that's why I think it's Panasonic.

author: zvonex66x
author_rank: Contributor
timestamp: January 29, 2018, 12:13:06 am
content: No, L101 not resistor, it's choke, inductor

author: Armadillo
author_rank: Super Contributor
timestamp: January 29, 2018, 05:38:58 am
content: Quote from: chris_leyson on January 28, 2018, 10:54:31 pmI don't know, it looks cheap to me, from layout, design, components to silk screening.Anything beginning with JD sounds like Chinese, if you know how they name their Chinese fighter Jets.Is that Paper phenolic?Maybe a Midea, yeah?

author: chris_leyson
author_rank: Super Contributor
timestamp: January 29, 2018, 07:29:33 am
content: I think they manufacture some Midea ovens as well and boards are always paper phenolic.

author: lloll
author_rank: Newbie
timestamp: January 29, 2018, 04:32:26 pm
content: Bottom side :https://www.dropbox.com/s/0ho97ccggs9jl8n/Photo%201-27-18%2C%209%2007%2011%20PM_preview.jpeg?dl=0Top and bottom sides in one pic :https://www.dropbox.com/s/1vz1yz957lx04xp/15169.png?dl=0

author: lloll
author_rank: Newbie
timestamp: January 29, 2018, 04:34:05 pm
content: Bottom side :https://www.dropbox.com/s/0ho97ccggs9jl8n/Photo%201-27-18%2C%209%2007%2011%20PM_preview.jpeg?dl=0Note that there are some wires connected , these for supplying power instead of the ic one is 12v and the other is 5v .Top and bottom sides in one pic :https://www.dropbox.com/s/1vz1yz957lx04xp/15169.png?dl=0

author: Armadillo
author_rank: Super Contributor
timestamp: January 29, 2018, 04:51:55 pm
content: IC Pin 3 is connected to a cap to ground, so it could be a LNK306P.

author: chris_leyson
author_rank: Super Contributor
timestamp: January 29, 2018, 09:55:01 pm
content: I asked and it's not a Panasonic designed board. Had a quick look around for Midea controller boards and found one manufactured by Midea for a Panasonic oven, E173873 PC Board, I don't know. If Armadillo is right and pin 3 is connected to a cap to ground then LNK303P is a good candidate.

author: Armadillo
author_rank: Super Contributor
timestamp: January 29, 2018, 10:18:06 pm
content: Mostly I should be as wrong as OP can articulate.

author: chris_leyson
author_rank: Super Contributor
timestamp: January 29, 2018, 11:06:30 pm
content: If pin 3 is not connected to pins 1,2,7 and 8 than that rules out the the Panasonic "3 pin" MIP parts and it's not a Sanken part.Power Integrations makes a lot of sense, they're used in a lot of white goods these days.