Questions tagged [charger]
A device which controls the voltage and current being delivered to a capacitor or battery.
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Should a USB wall charger protects its two USB lines against fluctuation in the other line? [closed]
I have a USB wall charger with a USB-A and a USB-C outlets. I have two identical USB-A LED lamps, and a USB-C Android pixel 8 phone.
The desired setup is to plug the charger next to my bed, power one ...
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FNB58 USB Tester: Using as universal power supply
I'm currently carrying quite a lot of different power supplies with me. To avoid additional weight and toolbox size, I would like to reduce it to 1 universal power supply solution.
In total, I need ...
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BMS 3S (S-8254A) with SJT-150E charger won't fully charge
Lately, i've been trying to use a BMS 3S that is based on the S-8254A IC to charge a group of three cells that I planned on using in series.
To charge the cells , I'm using a 12,6V 10A SJT-150E. This ...
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Repurposing liion charger, understanding pinout
I have this charger built for some kind of drill. LiIon, 12 V it says. From shape it probably was 3 18650s in series. Bunch of electronics inside but the part which actually contacts the battery ...
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LiFePO4 charge with Perfectpower DDC DC-DC converter [closed]
I have an electrical installation in my van to charge a gel battery from the alternator, using a domestic Perfectpower DDC DC-DC converter.
I want to change the gel battery to a LiFePO4 battery.
In ...
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How can I replace this wall adapter with a power bank? [closed]
I'm looking to supply a small Freescale board (no battery or charger chip) with uninterrupted power. This is its native adapter (5V, 2A):
This is the power bank. Passthrough charging works.
When I ...
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Why doesn't my simple 4V lead acid battery charger using an LM358 op-amp work?
I obtained the circuit copied below from: Instructables - Simple 4V Lead Acid Battery Charger
I changed the Zener from 4.2 V to 4.7 V.
The 7806 supplies 6 V to the circuit shown in the figure at J1-6V ...
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is there any way to add amps to a vintage battery charger using an additional transformer?
I have a 1970s vintage 10 amp transformer based battery charger and yes it has the old selenium rectifier. I'd like to kick the amps up and I have a few transformers sitting around that were pulled ...
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Why are there no 12V/5A USB PD chargers/batteries?
Any 100W USB PD 3.0 system must support 20V/5A charging. Naively I assumed that therefore they should support 5A at any of the lower voltage rails! But for some unclear reason, I cannot find any PD ...
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MPPT Solar Charge Controller Issues
I am working on a solar MPPT circuit to charge a battery from solar energy.
Solar panel: 18V
Battery: LiFePO4 12V, 10Ah
I referred to an MPPT circuit from this post MPPT Solar Charger and changed ...
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TL494 step-down converter with CC/CV [closed]
I want to build a universal charger for Li-Ion, LiFePo4, VRLA-AGM, and similar batteries (or just a power supply with CC/CV). I'll designate in advance that the maximum output voltage of the converter ...
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Reverse Polarity Circuit Protection
I have an adjustable voltage battery charger that goes from 6v to 14.8v and I need a reverse polarity protection to substitute the old one, which doesn't work. I mounted a circuit based on the ...
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Creating a 12.6 V 3S Lithium-ion Charging Circuit from 5 V USB-C
I have some questions about what is considered standard for a charging circuit, as this is something I have not much experience in. I am constrained to the following:
3S lithium-ion battery of 2600 ...
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Why is the power conserved in a phone charger?
Most phone chargers draw 220V 50mA (for example) from the socket to inversely proportional draw 5V and 2.2A (in its converter) to charge the phone at 2.2 A because power is conserved.
Why is power ...
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MS Surface power supply connector
This is an update to the first question about this connector.
I had 3 faulty Microsoft Surface power supplies and I draw a topological circuit diagram for it, to better compare it with the hardware.
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TP4056 charge discharge for a NiMH prius battery?
I want to make a capacity tester for a 6 cell module for prius batteries. They have 6000mAh new and anywhere from 2500-5000 mAH used. I was wondering if theTP4056 would work for a NiMH battery and if ...
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IMAX B6 batt charger- force to charge when low voltage/connection break
The Imax B6 battery charger refuses to charge batteries when they are below certain values, and it is highly recommended and safer for users.
However, certain times I need to force the load and accept ...
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Current flow through a busbar
In a circuit with a battery, charger and fridge connected via busbars, where does the fridge draw current from?
If the charger is producing 5A and the fridge is drawing 10A, does the fridge draw 5A ...
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Need a help with CYPD3177
So basically this IC is used to request specific voltage and current options required at any point. You can find a User Manual here.
For changing the output voltage it says in page 21 that you have to ...
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Can anyone identify this 6-pin SMD integrated circuit? (multi-charger)
This is a part of the ISDT N16 multi-charger.
The part labeled BF seems to be broken.
I think it's SOT-23-6, but I'm not sure.
It is connected in parallel with a gate of 8 FETs and is presumably a ...
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Will I damage a Li-Ion pack with a charger voltage greater than the pack voltage?
I am building a 4S battery pack with Molicell INR-21700-P42B batteries. I am using an Analog Devices MAX17320G as my BMS and Fuel Gauge for the pack.
Can I use a 19V 3.42A wall charger to charge these ...
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How to remove huge startup current spikes in charger circuit? [closed]
I am building solar USB charger model in matlab simulink. It uses solar panel as main power source and body consists of 2 buck converters and a battery. First buck converter has output capacitor(...
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Charger Output and Device Compatibility: A Safety Concern [closed]
The device we have has a 5V 1.5A input, and the charger has a 5V 2.5A, 9V 2A, and 12V 1.5A output.
If we use the charger at 12V 1.5A for a while and then switch to a 5V 1.5A device, could the device ...
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Animal repellent circuit for cows and goats
I want to create an animal repellent circuit for my school project but I'm having some problems designing the circuit. The circuit does not produce any sound frequency.
NB: We are not allowed to use ...
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Configuring a USB-C/PD Controller IC for a Type-A Output
I'm working on a new USB charging product to be installed on airplanes. I understand the power requirements well enough: it has to take 12V-32V input and be able to provide up to 45W of power per ...
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Number of solar panels to power a level-2 EV charger
I am working on a project for my intro to engineering class. We are theoretically designing a EV charging station powered by solar panels. I found an example level-2 charger that says it is 9.2 kW at ...
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How does this lithium battery charger 3S work?
I am trying to figure out how this lithium battery charger works.
How exactly do those discharge/bleeding resistors work? Are they only "activated" when no power is present so that each ...
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Small solar panel chip to charge a LiPo
I've found this small solar panel:
https://www.digikey.co.uk/en/products/detail/anysolar-ltd/KXOB25-02X8F-TB/9990458
I see that output can go up to 4.5v and 5mA . That's sounds huge for me BUT because ...
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What's the difference in loading outcome with a 42 vs 48 V charger? [closed]
I have a Lithium-Ion battery for an ebike.
The battery is 48V, and is rated 15 Ah, so that means 15V*15Ah = 720Wh, and as it says on the battery as well.
Now it has a 48V charger (rated 2 amps).
...
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On working principal of the low DC voltage charger of this certain behavior
How is the simple working mechanism or principal of the DC stage of a typically low DC voltage, ~ 5V, charger with the behavior:
if a MM simply testing its voltage it gives 0 volt
if a battery is ...
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How to convert this 220V AC input inductive charger to 127V AC input?
My friend bought a device that has wireless charging, but in my country, in the region I live, the AC voltage is 127V , and she received (a long ago) by mistake a 220V AC input version.
She never got ...
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Charging of 14500 Batteries/ Low mAh reading
I am using XTAR VC4 Plus charger. Batteries (Li-ion) are brand new 1. Sofirn 14500 920 mAh & Keeppower 14500 1100 mAh with PCB & USB port. After running grading mode on this charger ( Charge, ...
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Determine proper charger specs for a lithium-ion battery [closed]
I have a device with a rechargable li-ion polymer battery but do not have a charger.
Device: ZTE WF723CA
...
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Floating output voltage in USB chargers?
A USB charger is usually galvanically isolated from mains for safety reasons.
If I touch the output connector while standing on the ground (i am at earth potential), will I get a shock? I think yes, ...
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Battery charging algorithm
I have designed my MPPT battery charger to a state and I have been able to generate the 14.4V charging voltage, with the 40Ah battery charged upto 14.4V during bulk charging stage and absorption mode ...
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Can I use two of these modules to charge two lithium-ion cells that are in series?
I need a solution to charge two 3.7 V lithium-ion cells that are in series. However I have a very limited access to modules and I need to have current limitation as my source won't stand beyond 0.5 A.
...
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EV charger connector identification
I am building a portable EV charger demo for conferences, and for transportability reasons, I need the charger cable to be removable. Have you ever seen that connector?
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How to determine pinout on proprietary 3-pin charging port?
I picked up a dog collar at a yard sale that didn't come with a charger. Looks to use a 3pin charge port which takes 12v. Don't really want to buy a special charger for just 12v so was wondering how ...
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Is it safe to connect 3 batteries 2 in parallel and then one in series with them?
I have three 3.7 V li-ion batteries 4 Ah each. I need total voltage to reach 8.4 V at full charge, and use the higher capacity of the one left battery.
Is it safe if I connected two of them in ...
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Is this a safe way to increase the current in a battery charger? [closed]
I was watching this video and basically what he's doing is using the 4056 charger controller pin 7 to switch a IRF9540 that connects the positive straight through to the MOSFET.
Seems this would use ...
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replacing a "li-ion" HFC (3,2v) battery
I have a device with containing 4 x (allegedly) "Li-Ion" HFC batteries in serial but voltage is not 3.7 but 3.2V.
labelled values "Li-Ion 3.2v HFC1450 series 500mAh 1.6Wh"
Just ...
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Gate driver selection for digitally controlled via PFM, LLC resonant half bridge charger
I am designing a LLC half bridge charger. I am going to use a microcontroller to control the switching frequency, with feedback from the output to smoothly control the switching requency.
I don't ...
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Can I use a single battery charging ic to charge two batteries in parallel?
I am making a wearable device so for better space distribution I would like to use two smaller batteries instead of a big one. I've been using TinyCircuits's ASR00007 (290mA, lipo) battery which has a ...
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TP4056 USB-C charging module not working
I am having some trouble with my TP4056 USB-C module. When I first got it, I attached a Li-po battery to the battery terminals marked B+ and B- and without any load I plugged it in the socket to see ...
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Symbol for ground vs symbol for a battery [closed]
Could anyone help me to understand if this picture is correct?
It is to understand the difference between the symbol of a battery terminals and the symbol of a ground terminal.
I would also ...
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How does this lithium-ion battery charger work?
I opened a cheap USB single-cell lithium-ion battery charger, but can't figure what the Q1 is. It only says 'CR' on the surface. When charging, I measure about 0.7 V between its pins 1 and 2 (those on ...
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20V Max Lithium Battery "Charge Maintainer"
I have a gadget that uses a 20V max, LiIon, DeWalt compatible battery. It's detached for charging. A DeWalt charger is used to fast charge the battery.
The gadget has a POE ethernet connection. I'...
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Wi-Fi Router Charger: is 100-240V input an acceptable replacement for a 220-240V charger? [duplicate]
My wi-fi router charger is broken and I'm looking to buy a replacement.
The old one says - input 220-240V 50/60Hz 0.5A, output 12V 2.5A, efficiency level V
Online, the closest I found has input 100-...
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High voltage at the Schottky's anode terminal (Hobby Li-Po charger circuit)
I'm pretty new at hardware side of things and trying to teach myself circuit and PCB design just as a hobby, so. bear with me if I'm annoyingly noob for you.
As a relatively simple first task, I ...
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Is it possible to multiplex thermistors for multiple cell battery configurations for the BQ25756 or other JEITA charge ICs for spaced apart cells?
I'm trying to figure out how to safely implement fast charging using the BQ25756 with a most likely 2s (though up to 4s is possible) layout of physically spaced out cells.
I haven't fully decided on ...
