Identifying the IC manufacturer in link

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#1
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1. Here is the link for which I have to find the IC manufacturer:

 

https://www.google.co.in/imgres?...

2. Its a Li-Ion battery protection IC, 20 Pin SOP package, 9 & 10 Pin are shorted to ground

 

3. From symbol "M" on it, seems like Microchip IC, but microchip have no such solution I had checked. 

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I've tried similar searches for that kind of IC. It appears that many are made by fairly obscure manufacturers. I was never successful.

 

<edit> Should also add that many manufacturers make custom or semi-custom or "not for general market" chips. These are typically NOT listed in their catalogs and product lists. Battery protectors may be among the not for general market as they tend to sell them only to companies that manufacture battery packs. If you have one in a battery pack that has failed, then it is likely that your only "solution" is to purchase a replacement pack. </edit>

 

Jim

Jim Wagner Oregon Research Electronics, Consulting Div. Tangent, OR, USA http://www.orelectronics.net

Last Edited: Sun. Oct 1, 2017 - 07:47 PM
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Do a search for li-ion protection chip...you will find plenty to chooe from...what are your specs?

When in the dark remember-the future looks brighter than ever.

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Vindhyachal Takniki wrote:
I have to find the IC manufacturer

Why do you have to ?

 

What do you need that information for?

 

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I am guessing that the OP has a damaged protection board and wants to replace the IC on the board.

 

Jim

Jim Wagner Oregon Research Electronics, Consulting Div. Tangent, OR, USA http://www.orelectronics.net

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Quite possibly. Which then raises the question: is it worth it ?

 

 

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That is what I suggested in #2.

 

Jim

Jim Wagner Oregon Research Electronics, Consulting Div. Tangent, OR, USA http://www.orelectronics.net

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IC which I have on board has similar looking "M" logo on IC.
Following are numbers written on it:

 

620
B385A

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No, I am trying to reverse the board to make my own.

Is it Microchip or Mitsumi or any other manufacturer?

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As has been said, it is rather unlikely that you will identify this chip.

 

It is also highly unlikely that you will be able to make it any cheaper than you can buy it on AliExpress.

 

 

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Vindhyachal Takniki wrote:

2. Its a Li-Ion battery protection IC, 20 Pin SOP package, 9 & 10 Pin are shorted to ground

 

How do you know it's not a microcontroller programmed to act as a protection chip?

 

Trace out the whole schematic and see if the pins used match any known uC families. 

'This forum helps those who help themselves.'

 

pragmatic  adjective dealing with things sensibly and realistically in a way that is based on practical rather than theoretical consideration.

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Its not a uC. As it is used in 5 cell Li-Ion protection. Each cell has connection to one pin of IC with only 1K in series not an divider, that means its is specific Li-Ion protection IC. Normal uC dont have level shifted adc's

 

This logo I had checekd by below link, looks like Mitusumi IC, but i am not sure, as I didnt find IC even in tehier obsolete part & didnt find any email ID on Mitusumi for contacting them, & their Contact us forum always through HTMP error.

 

https://www.google.co.in/search?...

 

  

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Vindhyachal Takniki wrote:
Normal uC dont have ...

Again, there is no particular reason to believe that it is a standard catalogue part at all.

 

See #2.

 

And #10.

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So you didn't try Googling "mitsumi ic battery" then?

 

If you did then the first hit is this...

 

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

 

...and the third...

 

http://www.alldatasheet.com/data...

 

There you go, a supplier and a datasheet.

'This forum helps those who help themselves.'

 

pragmatic  adjective dealing with things sensibly and realistically in a way that is based on practical rather than theoretical consideration.

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Vindhyachal Takniki wrote:
Normal uC dont have level shifted adc's
Battery management megaAVR do.

http://www.microchip.com/wwwproducts/en/ATMEGA16HVB

4 cells, low side current sense, control of the high-side charge and discharge NFETs

 

"Dare to be naïve." - Buckminster Fuller

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awneil wrote:

As has been said, it is rather unlikely that you will identify this chip.

 

It is also highly unlikely that you will be able to make it any cheaper than you can buy it on AliExpress.

 

 

I can certainly not disagree with this comment.  I have given up trying to 'Roll my own' for certain things anymore as I can usually find what I need already done, and easy enough to integrate into my kit.  The only time I would do a basre design if it was an absolute requirement by the customer.

 

Vindhyachal Takniki wrote:
Its not a uC. As it is used in 5 cell Li-Ion protection. Each cell has connection to one pin of IC with only 1K in series not an divider, that means its is specific Li-Ion protection IC. Normal uC dont have level shifted adc's

Really?  Many/all AVR's have multi input ADC converters........

 

Jim

If you want a career with a known path - become an undertaker. Dead people don't sue! - Kartman

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Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB user