317 Threads found on edaboard.com: Battery Charger Current
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. (...)
Analog Circuit Design :: 03-22-2017 16:06 :: Dino1400 :: Replies: 2 :: Views: 584
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
Power Electronics :: 02-09-2017 12:13 :: Bjtpower :: Replies: 10 :: Views: 750
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. (...)
Power Electronics :: 02-02-2017 23:12 :: d123 :: Replies: 1 :: Views: 375
I try to figure out the best option to have adjustable load current for this charger
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.
Analog Circuit Design :: 12-20-2016 12:07 :: zuzurelu :: Replies: 0 :: Views: 600
If you've only got 8A to throw you will have no problem
finding low-enough Rds(on) FETs for the on conduction
losses to be insignificant. No matter what the voltage.
Think about what your battery bank can accept as a
charging current, that's what you will have to control
for at peak sun and low charge.
You can trade voltage for (...)
Power Electronics :: 11-24-2016 08:34 :: dick_freebird :: Replies: 24 :: Views: 1976
The pwm duty cycle calculations don't apply to the given circuit which is no boost voltage converter. Instead you are chopping the solar panel output current. No problem if you don't need maximum efficiency.
The "panel voltage" measurement isn't of much use unless you synchronize the ADC with the pwm. Similarly the battery current is also (...)
Microcontrollers :: 11-21-2016 18:33 :: FvM :: Replies: 7 :: Views: 949
You could use special battery charger ICs which i think is more safe.
For Example : Check LTC4079 IC from Linear Technology. Only needs a few resistors (and a NTC - Temperature Protection) and works up to 60V input. (250ma Maximum Output current)
Microcontrollers :: 11-14-2016 05:18 :: memarian :: Replies: 6 :: Views: 771
About basics, input is solar cell or 5 Vdc USB; and output is 5V; current is approximate 1A. Besides, i have Li ion battery.
You are missing the charger circuit for the Li-ion battery and you are also missing the voltage stepup circuit to increase the battery voltage to 5V output.
Hobby Circuits and Small Projects Problems :: 10-27-2016 00:07 :: Audioguru :: Replies: 11 :: Views: 1155
isnīt htis what ready to bux battery chargers do?
Is it worth the effort to design your own?
Power Electronics :: 10-17-2016 09:22 :: KlausST :: Replies: 1 :: Views: 408
it seems if you just make a simple example, you find out what happens....
(This should be your part... at least to give some data or other informations... now we just can assume what you want to do..)
Imagine you want to charge a Pb battery.
When the battery is empty you will see maybe 10.5V
When it is slowly full charged you will see
Elementary Electronic Questions :: 08-17-2016 15:35 :: KlausST :: Replies: 4 :: Views: 682
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 (...)
Power Electronics :: 08-12-2016 14:58 :: KlausST :: Replies: 6 :: Views: 521
What is your financial budget? And you footprint budget on the PCB? And you current budget for the chip (although if this is a battery charger I assume the power source is big enough for both jobs)?
Why are you looking at the PIC18F devices? Not saying that there is anything wrong with this decision but it could provide useful information to (...)
Microcontrollers :: 08-07-2016 23:00 :: Aussie Susan :: Replies: 2 :: Views: 353
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 (...)
Power Electronics :: 07-25-2016 15:32 :: Audioguru :: Replies: 1 :: Views: 336
You have some boundary conditions - panel bus voltage max
and min, MPP current, battery charger input voltage and so
on. These would say whether a buck will do or whether some
corner might need boost capability. This all has to do with the
components at hand.
I'm sure you can find SPICE subcircuits or even a representation
for whatever (...)
Power Electronics :: 07-24-2016 08:32 :: dick_freebird :: Replies: 11 :: Views: 1098
A lithium battery will blow up or catch on fire if you do not correctly charge it by limit the charging current, limiting the maximum voltage and disconnecting the charger when it is detected to be fully charged.
Your "charger" is not a charger, instead it is the power supply for the (...)
Power Electronics :: 07-15-2016 16:17 :: Audioguru :: Replies: 9 :: Views: 584
The input voltage of a CD4097 or an ADC must be within the power supply voltage range of it. So you can measure the first cell with one input at the battery ground which is also the CD4047 ground.
You can measure the 2nd cell with one input at the anode and the other input at the cathode and the voltmeter can be differential. But the 3rd cell's ano
Hobby Circuits and Small Projects Problems :: 07-13-2016 22:34 :: Audioguru :: Replies: 13 :: Views: 993
A Lithium battery is first charged by a constant current until its voltage reaches 4.2V per cell then the voltage is regulated at 4.2V. Then the battery charging current automatically reduces and when it is fairly low then the charger turns off and alerts you that the battery is fully (...)
Power Electronics :: 06-04-2016 14:50 :: Audioguru :: Replies: 4 :: Views: 585
If the battery worked properly when powering the printer before but does not work properly now then probably the battery, its charger or the power supply needs replacement.
A "7.4V" lithium battery should be 8.4V when fully charged.
A healthy Lithium rechargeable battery should be able to provide a very high (...)
Hobby Circuits and Small Projects Problems :: 05-20-2016 14:03 :: Audioguru :: Replies: 7 :: Views: 379
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
Elementary Electronic Questions :: 05-11-2016 05:53 :: tiwari.sachin :: Replies: 7 :: Views: 899
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 ?
Analog Circuit Design :: 05-03-2016 04:19 :: aliyesami :: Replies: 19 :: Views: 1083