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Recent content by esm.

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    Very slow charge of a Li-Ion battery can be a problem?

    Hi. If possible, plz take a look here: http://www.electro-tech-online.com/general-electronics-chat/128721-very-slow-charge-li-ion-battery-can-problem.html http://forum.allaboutcircuits.com/showthread.php?t=72533...
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    Very slow charge of a Li-Ion battery can be a problem?

    Hi. I have some PCBs that have a Lithium battery each, charged by a dedicated IC with a programmable current from 100 to 200mA, through a resistor RPROG. The batteries are 3.7V of 3000 to 5000mAh. 4.2V floating voltage Somebody know if is NOT recommended to make a very slow charge to these...
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    1-Cell Li-Ion Battery Protection ICs

    This ICs incorporates just an over voltage protection. So the chinese solution is much more complete. The IC should protect against undervoltage ( over discharge ) also.
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    1-Cell Li-Ion Battery Protection ICs

    Hi. The IC XB4301D (LINK BELOW) is a "One Cell Lithium-ion/Polymer Battery Protection IC" and there are many chinese companies producing this kind of protection ICs for 1-cell li-ion. It is placed beetween a Li-Ion and a power supply input. Some of its features are: - Battery Overdischarge...
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    12V / 6A Power supply. Help with Buck and Boost converters + OR'ing circuit

    Hi. Yes, the ORing circuit could also be done with a synchronous rectifier, but I think a single diode (maybe 2) could solve the problem with a lower price.
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    12V / 6A Power supply. Help with Buck and Boost converters + OR'ing circuit

    Hi. Thanks for the video link :) Have you ever seen a single Li-ion charger IC, capable of charging 4 Li-Ion cells connected in series? In a single chip?
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    12V / 6A Power supply. Help with Buck and Boost converters + OR'ing circuit

    Hi. Could you share the youtube link here? Thanks.
  8. E

    12V / 6A Power supply. Help with Buck and Boost converters + OR'ing circuit

    I was rethinking about this design. The output current will be reduced to 4A at the maximum load, not 6A as the initial idea I think now I can have a single solution based on a buck-boost topology, right? My only experience with a buck boost IC was the TPS63000 from Texas, but it doesnt fit the...
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    12V / 6A Power supply. Help with Buck and Boost converters + OR'ing circuit

    Thats OK. but I would like to ask the users from the forum if they already used such kind of controllers, a particular buck or boost IC, similar to the ones I would need to meet the requirements of my circuit, and if the results were satisfactory. it is always good to hear from someone who...
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    12V / 6A Power supply. Help with Buck and Boost converters + OR'ing circuit

    Hello all. Maybe someone here can give me suggestion of ICs and make considerations about this design. The picture below states how this power supply should work. Details: 1) IC 1 probably will be a LT3650-8.4 from Linear Technology. It supports up to 32V of input voltage (40V peak)...
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    RS-485 (MAX487 / MAX485) - On-chip fail-safe feature

    Here is my current schematic, attached in PDF and PNG. I would like to design this schematic for use in RS-485 buses with a maximum of around 64 nodes. I have some doubts about this schematic yet: 1) For R3 and R8 (fail-safe biasing), I am using 560 Ohms. Somebody know which are the most...
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    UART over ISO-11898 signalling ??? RS-485 vs. ISO-11898 discussion

    Hi. ISO-11898 specifies the data link layer (DLL) and physical signalling of the controller area network (CAN protocol) I want to discuss a little about advantages and disavantages between RS-485 and ISO-11898 electrical standards, for a half-duplex communication bus. Both ISO-11898 and RS-485...
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    RS-485 (MAX487 / MAX485) - On-chip fail-safe feature

    Hello all. I have a good knowledge on RS-485 buses. I have some doubts about the internal fail-safe feature of MAX487. I know how to do a fail-safe biasing using external pull-up and pull-down resistors, but my doubt is just about the internal fail-safe feature of these transceivers...
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    What RPM "KLW" mean?

    Hi. Could somebody explain what RPM "KLW" mean, in an car, bus or truck vehicle? I know RPM mean rotations per minute of the engine, but RPM "KLW"? Would it be the number of rotation per minute of the alternator (battery charger) ? I am asking because last week I've used a Mercedes-Benz...
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    Design / parameters of PTCs. Help with current limiting circuit.

    Hi. I have a PicKit3 MCU programmer from Microchip. There is a PTC sensor close to the USB connector. Thats the PTC: http://search.digikey.com/us/en/products/MINISMDC050F-2/MINISMDC050FCT-ND/1045862 Datasheet: **broken link removed** Somebody could explain the meaning of each of these...
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