have this UMAX 14wa that switched charger polarity. i found some bad ic and i need to identify it.
Mark on it is
R9CSC
it is voltage regulator
Mark on it is
R9CSC
it is voltage regulator
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Re: UMAX 14wa - switched charger polarity need identify ic
no other markingAttached FilesComment
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Re: UMAX 14wa - switched charger polarity need identify ic
thanks. from here it looks like it.
Silergy marking codes
https://www.forum.diacom.az/viewtopic.php?p=680Comment
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Re: UMAX 14wa - switched charger polarity need identify ic
One of those lists at that forum is a copy of ours https://www.badcaps.net/forum/showpo...1&postcount=12 .The R9***/SY8388B3RHC has been posted at the russian vlab forums in their silergy thread,and at the 4pda forum, i havn`t added it to our list there`s no pictures or datasheet available (only to silergy customers) ,so there`s no way to confirm it. Overview https://www.silergy.com/zh/productsview/SY8388B3RHC
The SY8388B3RHC can be found on Teclast F15 and Chuwi CoreBookXPRO motherboards,there`s no full schematics available for either of them but i found a BOM and motherboard outline for the Chuwi
https://www.badcaps.net/forum/showthread.php?p=1183457
.Last edited by SMDFlea; 11-24-2022, 05:33 PM.Comment
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Re: UMAX 14wa - switched charger polarity need identify ic
Sharing the attached.Attached FilesComment
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Re: UMAX 14wa - switched charger polarity need identify ic
Found in the NM-C771 schematic as well https://www.badcaps.net/forum/showthread.php?t=110962Comment
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Re: UMAX 14wa - switched charger polarity need identify ic
Ask any high rated vendor on AliExpress that sells silergy parts for help. They will run across the street and buy it for you in Shenzhen.Comment
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Laptop Question
Hello,
I'm working on a Lenovo T460 that has been having trouble charging as of late. Its worked well since I've owned it for a few years. When I went to use it the other day it was dead and wouldn't turn on (was sitting on an Anker 65W GaN charger). After some fiddling with the charger I got it to turn on and start charging, but seemed like the charger was not working as it should (took a few plug and unplug cycles to get it to start charging).
A day later it was dead again and wouldn't boot/charge no matter what I did. No lights or anything when... -
The ISL88739 & ISL88739AHRZ are a highly versatile combo battery charger
configurable for operating as either a Hybrid Power Boost (HPB)
charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
4-cell batteries. Both configurations allow the battery to work with
the adapter together to supply the system load when it exceeds
the adapter capability, referred to as system Turbo mode. HPB
charger configuration reverse-boosts battery energy to the system
bus to help the adapter provide the system power in Turbo mode.
NVDC charger configuration...11-05-2024, 03:28 PM -
I have an RC radio handset(Taranis QX7) which doesn't have internal battery charger which means I had to remove the battery every time I needed to charge it.
So to improve it, I added a 15W USB-C charger board(link) inside and soldered it to the same connector on the PCB where the battery plugs into, great, now I can simply charge it with a USB-C cable.
but the problem I found is that after the radio sat for two weeks without being used the 2S 18650 battery that I'm using was at 4.2V!
So the battery is backfeeding the charger and being drained.
How can I prevent... -
The charging indicator light on my ASUS X54H laptop is always on even when the charger is disconnected.
Windows also shows ''Plugged in'' when charger is not connected.
This problem started year ago gradually, when unplugging the charger the charging light took several seconds to disappear, then minutes, and now almost always on even when unplugged for an entire day.
Strangely, before sometimes immediately when plugging in the charger the charging light went away, and later came back with it connected.
If I let battery run out and say it has 3% Windows will... -
Hi, I have a Dell Inspiron 7567 LA-D993P that I've just got running.
There was corrosion around PU1503 which shorted PC1518 & blew PL1504. (Reference pictures attached)
I've replaced PC1518 & PL1504 & the laptop is now running however I now have another issue.
Here are the tested scenarios:
1. With the laptop running on battery, I plug in the 150W charger & the charger shuts off (no LED, protection mode) but the laptop remains running on battery.
2. With the laptop off, plug in charger (LED says on) & the front charging...
Comment