MAX77818 Alternative - Page 1
Forum section: electronics / projects

author: Spikee
author_rank: Frequent Contributor
timestamp: January 04, 2017, 02:04:31 pm
content: Hi,Does anybody know an alternative for the:MAX77818https://www.maximintegrated.com/en/products/power/battery-management/MAX77818.html- Don't need the dual input- min 2A of charging current 1S lipo- USB type voltage input- "smart" adapter current detection (as in detect how much current it can pull without the adapter killing the voltage)- Thermal regulation on the chip against overheating of some kind- If possible have a battery fuel gauge built inMAX77818 is a great chip but it is just not available in 100-250 qty.The goal of this project is 1K boards but if you want to buy it from maxim direct (and they have 236K stock)you have to buy at least 1000 chips and that is what is really holding me back. The chip is also really price competitive.Since most phones / tablets also have this "smart" adapter current detection one must assume there are other equivalentchips out there that you can actually buy in 100-250 qty?Any help is appreciated. Worst case I can reach out to maxim and see if anything can be arranged.Thanks

author: Kjelt
author_rank: Super Contributor
timestamp: January 04, 2017, 02:29:16 pm
content: Quote from: Spikee on January 04, 2017, 02:04:31 pmMouser sells them in those quantities, just a €1 higher price a piece.

author: Len
author_rank: Frequent Contributor
timestamp: January 04, 2017, 03:24:05 pm
content: Quote from: Kjelt on January 04, 2017, 02:29:16 pmI guess it depends on what you mean by "available":Quoteref.http://ca.mouser.com/search/include/aoo_popup.aspx?mouserpartnumber=700-MAX77818EWZ%2b

author: Kjelt
author_rank: Super Contributor
timestamp: January 04, 2017, 03:34:54 pm
content: Ah ok the webpage indicates 236.000 in stock and 200 on demand, so I thought they would cut a reel from the 236k stock.

author: Spikee
author_rank: Frequent Contributor
timestamp: January 04, 2017, 11:59:49 pm
content: that is stock from maxim direct. but need to buy in 1k qty.x-power axp228 would fit the spec but it is so much overkill(these chips are used in pretty much all the all-winner tablets)and it is like 60 centshttp://www.x-powers.com/product/AXP22X_en.phpThere must be some alternatives that you can just buy in somewhat qty at distributors.

author: Spikee
author_rank: Frequent Contributor
timestamp: January 05, 2017, 12:26:15 am
content: I contacted maxim sales, lets see if they want to sell any chips.One can buy it on taoboa trough ...https://item.taobao.com/item.htm?spm=a230r.1.14.4.r6ZuZt&id=537114864273&ns=1&abbucket=6#detail980 pcs stock , apparently samsung uses it in one of their devices.

author: steaky1212
author_rank: Regular Contributor
timestamp: January 05, 2017, 09:17:42 am
content: Curse of Maxim - really cool chips that you can't get hold of

author: BrianHG
author_rank: Super Contributor
timestamp: January 05, 2017, 10:18:24 am
content: You really found a killer Maxim chip. Now, some of these have fewer options, but, one might do:http://www.linear.com/parametric/Switching_Battery_Chargers#!cols_1806,1072,2177,1068,1067,1367,1033,1032!s_1067,0!gtd_!1067_2|3:4!1806_Li-Polymer(I hope my narrowing of selection fields in the table have kept...)http://www.linear.com/product/LT3651-4.1http://www.ti.com/product/bq24100/descriptionhttp://www.ti.com/product/bq24170I don't see anything exactly like the Maxim chip, it's that darn great starting voltage of 3.2v with a 3amp charge......National do have 2.7v to 5.5v USB boost lithium chargers, but, they only charge at 1.5amps.