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317 Threads found on edaboard.com: Battery Charger Current
Hello, I'm looking for a battery charger IC that can be configured for 1A and 2A output based on some resistor divider or sensor. I'm thinking of something like LTC4001 anyone has a better suggestion on the battery charger that has a 1A to 2A range and that can be easily configured to charge at 1A/4.2 and 2A/4.2. (...)
Dear Friends I have designed the Circuit from The power Integrations which i have attached in the Mail My problem is when i switched on the supply on direct ac with 50% load. my TOPSWITCH is blasting. When i am trying to turn on With the help of Variac it is working properly and taking 1.4 amp of load. At startup waveform i have captur
Hi, I'm sure it's possible and effective with sufficient research and diligence. You'd need something like an LDO (paying attention to the current it can really provide with 7.2V - 3.8V * required charging current) or a Buck Converter IC might be more suitable, and probably the best choice would be a battery charger IC. (...)
Hello friends, I try to figure out the best option to have adjustable load current for this charger 134680 I have a external device that may experience low temperatures for several days (-10 deg C or more). The battery is a special Li that can be charger from -10 normally and up to -30 deg with reduce rate of about 0.
Hello, I want to redesign my solar off-grid network by reconfiguring the PV panels (series/parallel) and by building a high efficiency battery charge controller. Speaking of battery chargers, the buck converter seems to be the obvious (and most used) circuit topology but, when it comes to active components (mosfets) selection, I found it (...)
Hi This is the circuit I designed for charging 12V gel and Lead Acid batteries upto 12Ah. Do I have to make any changes to it ? This is the Solar Panel I am going to use. Circuit Attached. While designing Inverters I found that battery Charging current should be 10% of the Bat
Hi I am searching for a highly integrated solution (ideally with no external parts) IC for charging a 9 (8.4)V NiMH, 280 mAh battery from a 24V regulated power supply. I plan to use this as a backup power supply for a small circuit. Unfortunately every charger schematic I find on the internet uses too much external parts and my space are very li
If you mean one of those portable 'bricks' you plug in instead of an AC charger, most are nothing more than a battery and a charger socket. Brian.
Dear All, I want design SMPS with battery back up for long time. But my charging current is very low approx. 2Amp but i want to increase it. I want design the system with following specifications: Output voltage : 12-15VDC Load current : 4Amp. battery charging current : 6Amp. With overload (...)
Could someone explain why most feedback based regulating circuits follow a buck/boost converter design or something much more advanced that a simple PWM regulator that I am thinking of (see the pic). What is the purpose of sophisticated circuity in dedicated charger chips? In other words, what is wrong with this simple microcontroller based a
Hi, charging a LiIon battery is a problem of current and voltage. There are several charging techniques described in the internet. They tell you how to set (change, regulate) current and voltage. Knowing this you can use a * microcontroller and * a power supply (linear, switch mode...) with adjustable voltage and/or (...)
I am new to PIC though not to Ucontrollers having programmed on arduino,8051. I am into a project to charge a LI-ion battery with battery management system inbuilt in it and provides a CAN bus interface to communicate SOC of the battery,. So my task is to design a suitable charge controller to chrage the battery at 0.8C (...)
A Lithium battery cell is 3.2V when its load MUST be disconnected and is 4.2V when fully charged and its charging current has automatically dropped to a low amount when the charger MUST be disconnected. Then its average voltage during a discharge is 3.7V. The boosted output voltage is set with a two-resistors voltage divider so if two of (...)
Hello, I'm studing a System for an array of solar panels (240W each, 16 in series). I'm considering using a buck converter to charge a high voltage battery pack (from 300V to 380V when full) from the pannels. the circuit i'm considering is attached. During the simulation of the circuit, when i use an ideal voltage source as Vi for the
i want to charge my opened li-ion battery. it is rated with 3.7v and it is working properly. but my old mobile(phone) is broken. i also have the different model mobile but, both battery model is same size and same ratings. but i have opened the battery so that i cant charge battery by plugging in with the mobile. when i (...)
I have lipo battery with 8 cells so total voltate is 33.6V Now I need to measure each cell and when first one drops to 3.8V when discharge relay will turn off. Problem is now how to measeure each cell because they are serial connected. I thought to use Cmos 4097 which has 2 x 8 channels to switch between cells. problem is because power voltage
This sounds as though it's a 'smart' charger. It performs a taper charge. It reduces charge rate as the battery becomes almost full.
I am using a 7.4V battery (2200mAH), AT some instance when the circuit draws more current, I see drop in this voltage. As my knowledge goes, it is because of internal battery resistance and the total resistance of the circuit where the voltage gets divided. I tried connecting a DMM to measure current and a CRO for (...)
I am using a Li Ion battery (7.4V/2200mAh) The charging circuit I use is as The MOSFET I am using is FDS4935BZ It all works fine but the MOSFET heats up a lot. Meanwhile I tried reducing charge cur
I put this circuit together that charges the 3.7V Lipo battery and also produces 3.3v at the output . An LED indicates the charging status . I am getting 3.3v output but the LED is not lighting up and the status pin is showing zero volts . is the charging part of the circuit correct ? 128720
Hi folks, my name is luis pepe of Argentina. I'm working with a battery charger based on a TL494, LM741 and bta25-600 triac circuit. The charger regulates the current supplied to the battery sensing the voltage drop in the shunt resistance. The TL494 is synchronized with the line. My problem is the (...)
Hi guys, I'm an electronic newbie, reading some books and I thought I had finally understood the basis of circuitry, but no... I didn't. I'm a pic programmer and began on arduino a few years ago. I saw a hole in all this "arduino stuffs" that only electronics could fill so I decided to study it. In arduino forums, what I call "5v forum" :razz: t
I thought each panel would be only low power, and that you would just have a separate current regulated boost converter coming off each panel and pouring its current into the battery. Or are you saying that there is an inverter already attached to the panels giving a 230vac output? Because it seems a waste to have to go from the panel (...)
Have someone ever used the LT3650? I have designed a circuit charging a 18650 battery. It works ok but the IC gets very hot (50C) at 12V input and over 65C at 28V. The IC has about 20mm? of copper on the bottom side and about 10mm? on the top side. Charging current is set to 1.5A. IC should have thermal shutdown but is this heating normal? I
Hi, Can I use the ltc4057-4.2 to charge a 10440 battery? This battery is a two terminal one (no internal thermistor) but it has an embedded PCB for protection. If so, can I leave the battery connected to the circuit which it gives power to, during charging, so that the tp4056 provides current to charge the (...)
HI all, I need to control the Chip Enable (CE) Pin for trun ON/OFF the charging application based on the voltage on there any current limitation to this CE PIN, am thinking to pull up by 10K for enable disable sinking through bc547. Is it ok, Kindly give me suggestion.
i was thinking that a car battery charger with a big transformer would be a good start, use a 1A 5V regulator and a LM317 linear regulator with a big heat sink. Metering:- Analogue are good but expensive, Digital meters are cheap but need a battery (DVMs cost from ?5 here in the UK). I think current overload is a must from (...)
A TP4056 can do the job better than a PIC at low cost because it is designed for that purpose itself.
well there is no point doing it any faster than 100khz. As long as you have analog overcurrent protection, you can do the sampling at some very low frequency if you want, say a couple of 100 hertz. Though if you slowly give it a software soft start, and you have the fast analog overcurrent protection, then you can sample at slower than that if you
what is the Ampere-hour of the battery? This is first needed. But basically, lead acids have a charging regime which is constant current followed by constant voltage So at first you charge at C/10 until the terminal voltage gets to 10V Then you start charging at your charge rate, then when the voltage gets up to around 13V or so…..you keep
If the charger sets the limit at 20AH, the larger battery will just take longer to charge up. If 20AH is the maximum the charger can sustain, the extra current needed by the bigger battery will overload and possibly damage it. The battery will not be harmed though. Brian.
what you should do, for dull days, is have a big capacitor at the output of the panel, and let this slowly charge up as current dribbles out of the panel, then when the cap voltage gets so high , put it through the switching converter and into the storage battery. When its shiningg bright, I belive as discussed above, that you need to regulate e
Hi, I came across a page on using a dvd player's power supply to run a load here. I was thinking... maybe to get it to work as a trickle charger for charging a 12V car battery. After all, a dvd player would not draw high current during operation. However, i am just not sure about the ACTUAL output vo
Hi I have a burnt KDS120 diode in series with a charger that charges a battery. The device that is charged draws about 400mA at 6v, and this passes through the diode. Please recomment me suitable replacements as I cannot find the same diode on ebay. They have to be pin and power compatible (used for DC 6v) Can the BAW56 be used? (I have one availa
Most of the cell phone chargers are 5V or 5.1V but the current rating veries from 500mA to 2A. Is it the charge current determined by the wall mount charger or internal circuitary of the cell phone? I belive that the charge current of the battery is determined by the charge management (...)
The charger circuit, the transformer or maybe both limit the current. The little charger gets hot because it is small and cheap. A little dead battery draws the same limited current as a larger dead battery but the larger battery draws the same limited (...)
We can't find the regulations for level of PFC required above 1kw? Is an electric car battery charger considered as professional equipment? Otherwise EN 61000-3-2 (IEC 1000-3-2) class A harmonic current limits apply.
Hello, We need an AC Mains current monitor to monitor the AC current going into our 3.8kw, 230VAC battery charger. I found the HMS 05-P: ?But it look like it gives a voltage out which is just an offset sine wave with a 2.5V DC offset. (The datas
The power bank has the current detecting shutoff circuit on the same circuit board as its voltage boosting circuit and its Lithium battery charger circuit so you need to design all circuits for it to not shutoff when its load current is low. A problem will be that its battery will be destroyed if it becomes (...)
Hello, May we use the following relay in series with the output of our 400VDC, 10A battery charger output? We know that it is only rated for 28VDC, but we will never switch this relay when there is current flowing through it, so we will therefore be ok to use it in series with out 400VDC output? T90S1D12-12 Relay:-
I am not sure why you show a switch for the coin cell to be (1) charged with no load or (2) drive Buck regulator with no charger. Your Title suggests you want to do both. I only suggested a silicon diode so that battery won't drop below 20% SOC by haveing 4.2 charger-0.6V diode= 3.6V to prevent excessive underchargeof coin cell if (...)
Considering PV is a current source (hi Z) and battery is a voltage source ( sink) with low Z, do you think it is a good idea to know the battery ESR. What range of Rdson/ESR ratio would be best for minimum loss from a 300W source? Think!
I would like to modify this charger to run from a DC source. I could just just run it from an inverter but that seems like a lot of wasted energy in conversion 12vdc > 240vac > charger Also would like to keep it all in the current case if possible. In the old days of transformer based chargers it was easy enough, (...)
Looks like a valid option if you don't need high accuracy. Rectifier reverse recovery charge is obviously a limitation. Why is it that none of our competitors is doing this? Means you didn't yet notice a secondary AC current measurement in a battery charger. How can you be sure that nobody uses it?
Hello, I am trying to build a very tiny li-ion charger for the nokia bl-6c battery. Recently I have found the tp4056 IC. Can I use the application circuit in it's datasheet to directly charge such a battery? What should be the resistor current setting for this specific battery? Apart from that, can I use (...)
I am working on an inverter with a battery charger for a 24V,200AH AGM battery pack. The battery charger current can be adjusted from 10 to 50 amps. Now, I want to be able to also a charge a lithium battery (24V,150AH) with this charger. Since the lithium (...)
Hi all, I'm setting up a small solar panel to act as a trickle charger for a small 12V SLA battery. I've stepped down the 22 volt max from the 1.5 watt solar panel to 13.5 volts with a buck converter, with a maximum current of about 250 mA, but when the solar panel outputs less than 13.5 volts, the buck converter starts drawing power (...)
117004 one NiMH 1.2V cannot light up the LED1, i think that is due to insufficient current. but with two 1.2VNimh battery can light up. So, how can i adjust the resistance value in order to light up the LED1, or how to increase current in the LED 1 way when i plug in one NImh battery? [COLOR=silver
A Ni-MH cell has a voltage as high as 1.5V only when it is overcharging at a current that is too high for it. Look at or at the applications manual from . A battery charger IC detects the small drop in voltage when a Ni-MH cell becomes fully charged then stops the charging to prevent overcharging. M
Ordinary Li-Ion and Li-Po battery cells have a maximum voltage of 4.20V. When their charging voltage reaches 4.20V then they are only about 70% fully charged. Considerable more charging time is needed at 4.20V until the charging current is detected to drop to a low value then the charger should disconnect the cell. Your (...)