I hope this question belongs here, as it's not a component and I do "know" what it is. This is a lead-acid battery charger made for 12V batteries (6-cell), with a capacity from 10 to 50 Ah. But what I would like to know is how it charges the batteries, and if it's appropriate to use for charging a "small" 4.05 kg 12V/12Ah lead-acid battery (sealed, spec sheet: http://huanyubattery.com/en/admin/Upimg/20079121921160538.pdf ) Is it a three-stage charger? Does it float charge? Trickle? etc. I hope someone can tell from the chip!
The inside of the charger looks like this (the rest of the unit is just a transformer):
Yep you're right - thanks! I tested them and they seem to work as I'd expect from an SCR. Any ideas on how to get the specs or are they essentially useless without? I guess I could test one to destruction then back off a lot....
romantronixlab,
57b6 marking could be a TP4057 lithium battery charge controller.
romantronixlab,
57b6 marking could be a TP4057 lithium battery charge controller.
Thank You MLXXXp, How do I know to interpret those codes. Is there a table indicating meaning of the IC? I did find a SMD code table for resistors an diodes but nothing else.
BTW: it is a charge controller for a lithium work lamp.
Again Thanks
How do I know to interpret those codes. Is there a table indicating meaning of the IC?
I'm looking for the data for an Exar switch mode regulator IC used in a Hewlett Packard product made in the mid to late 1980s.
The instrument is a HP 54120B sampling scope.
The chip is marked:
Exar 1826-1120
9042 C5280.
The "1826-1120" is a HP part number, but I cannot find this in any HP part # index I have.
The package is a 20-pin ceramic DIP.
I have an Exar 1987 data book, but none of the switching regulator ICs listed have 20 pins.
found this info that might help.Use google translate
http://www.radioamateur.org/forums/index.php?/topic/30785-xr1826-1120/
edit: http://www.ashlea.co.uk/p/XR1826-1120.aspx
Interestingly, I crossed it to NSN 5262-01-304-8068. I found some minimally useful info here and here, but further searching turns up that this IC is used in missile guidance and navigation systems (link), so perhaps that's why it's so hard to find information about it.
I'm a bit confused by the markings on this 4x surface mount resistor I harvested for smd removal practice. It measures 8.0 K exactly, I checked several. I was thinking it may be a poorly printed "8", but they don't measure 8.2K, they are 8.0 K.
Can anyone offer any insight?
How do I know to interpret those codes. Is there a table indicating meaning of the IC?
There are people maintaining tables of IC markings but I don't think there's anything official across manufacturers.
In this case, I just did a Google search for "57b6 sot" (SOT is the package type) and got a likely hit on the TP4057. A second search for TP4057, along with your description and looking at your board photo, then confirmed the probable match.
I'm a bit confused by the markings on this 4x surface mount resistor I harvested for smd removal practice. It measures 8.0 K exactly, I checked several. I was thinking it may be a poorly printed "8", but they don't measure 8.2K, they are 8.0 K.
Can anyone offer any insight?There's nothing strange or wrong about this. SMD resistors with only 3 digits on them are ±5 % resistors. SMD resistors with 4 digits on the other hand are usually ±1 %
These are 8k2 ohm resistors with a ±5 % tolerance, so 8k0 ohm is well within specifications.
-5%:
8k2 ohm * 0.95 = 7k79 ohm
+5%:
8k2 ohm * 1.05 = 8k61 ohm
So everything in the range between 7k79 and 8k61 is within specifications.
They probably all have the same measured value because they're all from the same production run.
found this info that might help.Use google translate
http://www.radioamateur.org/forums/index.php?/topic/30785-xr1826-1120/
edit: http://www.ashlea.co.uk/p/XR1826-1120.aspx
Sadly, no that's not it. The UC2823A is a 16 pin DIP. It has a 20 pin PLCC-20 package version, but the pin functions still don't match the PCB.
maybe this will help then,its not the same model as yours though, its a 54110D .
http://forum.vintage-audio-laser.com/resolution-pannes/54110d-deux-pour-prix-t15860.html
maybe this will help then,its not the same model as yours though, its a 54110D .
http://forum.vintage-audio-laser.com/resolution-pannes/54110d-deux-pour-prix-t15860.html
No ,i`m not a member,sorry .I just found it using a google search.If you can`t get in touch with him there is a cd on ebay with the full service guide plus a service supplement with everything you need.If you take a look at the cd it has the hp part numbers. At the bottom of that listing though it says :
THIS CD WAS REPRODUCED WITH PERMISSION: COURTESY OF AGILENT TECHNOLOGIES INC.
http://www.ebay.com/itm/HP-54110D-MANUALS-BOARD-LEVEL-SCHEMATICS-3-VOLUMES-/220416346054?pt=BI_Books_Manuals&hash=item3351d687c6
The same service manual you found on elektrotanya is available from agilent ,but not the other supplements.
http://www.home.agilent.com/agilent/techSupport.jspx?pid=54110D:epsg:pro&sortKey=date&pageMode=MN&lc=eng&cc=IN
Ive done a google search for the 54110-90903 supplement but found nothing, not for free anyway .
INCLUDING a rare set of BOARD LEVEL SCHEMATICS !!!!
CONTENTS (REPEATED FOR EACH MAJOR BOARD ASSEMBLY)
THEORY OF OPERATION
COMPONENT LEVEL PARTS LISTS
BLOCK DIAGRAMS
BOARD PARTS LOCATORS
DETAILED COMPONENT LEVEL SCHEMATICS