Questions tagged [charger]
A device which controls the voltage and current being delivered to a capacitor or battery.
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IP3510/IP3506 don't fully cut off the power in standby
I'm experimenting with various "power bank" modules:
https://a.aliexpress.com/_EypXQkN
https://a.aliexpress.com/_EvgbXp3
https://a.aliexpress.com/_EIQPLzL
They all are based on either ...
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How to Calculate the Exact Timing for CV charging mode in a lithium cell?
We charge our Battery with CC method upto 80%. We got the time for it. Capacity/Ah. Now we switch to CV method for rest of the 20%. How to calculate Time for that Dropping Current?
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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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Which topology is best to design a DC DC 120W Power Supply? Kindly go through details
My requirement is as follows:
Input Supply 110+-30% VDC i.e., 77VDC to 138VDC.
output need to be 24VDC 5A.
All the basic protections like short circuit, Reverse polarity.
No power consumption when no ...
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TP4056 - Micro USB 5V 1A - Output pins Current supply
I have "TP4056 - Micro USB 5V 1A Lithium Battery Charger with Protection" as below
I have a Li-Ion 3000mAH battery like below
Connected them as below
Questions:
What is the maximum current that I ...
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Where is the current sense on this 3S 40A BMS?
I purchased a BMS rated for 3S, 40A (still in transit.)
According to seller, this has over-current, over-voltage, under-voltage and short-circuit protection and 100mA balancer.
After closely looking ...
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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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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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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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Help to understand the operating logic of the Bosch charger
I ask for your help to:
determine, if possible, the type of transistor T5, T7 (SMD code: MK3C).
help me understand the operating role of the set T5, T7 and R23, R33 in the circuit (it's like a ...
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How to design a circuit to disconnect a battery charger automatically?
I want to use an AC to DC 14.4 V adapter to supply both my circuit and its battery.
The circuit works with 12 V and I use a battery during power outages (blackout time).
I have prepared the below ...
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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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BQ51051B or BQ51050B communicate but won't charge
I was building this wireless IC charger using BQ51051BRHLR circuit and when I connected the coil to the transmitter the output on Pin Rect shows a voltage of 10 V but the battery won't charge.
Here ...
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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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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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Three-wire USB type-C power delivery
My HP Chromebook type-C charger stopped working after a hard pull on the cable. I tore apart the connector and found out the wires just beneath the connector were damaged. I got a new connector to fix ...
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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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Protection IC stopping battery from charging
I'm using an AP9101C as a protection IC and an MCP73811 as a charger IC for a single cell Li-po like this:
The load works fine, but when I connect +VDC (5 V), suddenly CO of the AP9101C goes to 0 ...
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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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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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Is there a reason GaN chargers stop at 65W?
During the last year or so we have seen commercial release of USB chargers utilizing GaN technology. For some reason it seems no products go higher than 65W. The Navitas reference platform was 65W, ...
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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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Maximum Power Point Tracker (MPPT) charge controller - what drives the weight?
I'm having trouble finding any literature paper that studies this problem. What drives the weight of an MPPT charge controller? How would I go about reducing that weight if I had to design a custom ...
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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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Replacing a 12 V, 19 Ah lead-acid battery with a 12 V LiFePO4 battery
I have a Stanley PPRH7DS battery charger that came originally with a 12 V, 19 Ah lead-acid battery. This battery has since given up the ghost and I am looking to replace it.
Last summer I constructed ...
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How to add Reverse Polarity Protection on 2-cell battery charger IC?
I'm using the MP2672A (datasheet) 2-cell balanced charger IC for charging 2 li-on batteries. Normal PFET reverse polarity protection (RPP) doesn't work here as the IC has a balance function which ...
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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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What charger for a 13s10p Li-ion battery pack?
I plan to make a battery pack for my vehicle, 13s10p Li-ion battery. It gives me 30Ah.
If one battery can be charged at 1A, can I charge 10 batteries in parallel at 10A?
For now I have a 2A ...
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How to limit input current with LTC3625 and MPPT circuit?
How can I limit the input current with this circuit?
I need it to draw a max of 0.2A, so I can see how long it takes to charge different capacitors. Changing the value of R1 on PROG pin does not ...
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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 charger module - Can we change the "Preset 4.2 V Charge Voltage" to 4.0 V?
I am using a TP4056 charger module to charge a 2000 mAh lithium-ion cell (18650).
The source voltage is from a solar panel that generates a maximum voltage of 4.0 V. The TP4056 charging module is not ...
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Laptop connectors and universal chargers (tips M3, M4, etc.)
I am interested in having more information about connectors and identifiers (M3, M4, ... M31) used by laptop universal chargers.
Is there any "official" list or convention for laptop ...
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AC voltage on the outside surface of micro USB charger cable
My micro USB mobile charge cable is having about 98V AC voltage on the outside surface. (PFA measurement image. The black probe is connected to the Power socket Ground port. I could not take the whole ...
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How to educate myself about PWM solar charger circuit design?
Since my previous charger said farewell today, I have decided to build a 48V 100A solar PWM charger (for LFP cells, ie. CC-CV) myself. I don't need MPPT because I have already well-balanced PV and ...
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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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How to deactivate Li-Ion battery charger
I have a USB device, which does have a Li-Ion internal battery in it. The device charges the battery when plugged into a socket.
However, I don't want that battery to be used at all, I do prefer that ...
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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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Battery Charger and power supply DC-DC with noisy input
I have sort of a weird question I'm hoping folks here can help with. Have searched other questions but not found a similar-enough one that applies.
I have a large mechanical system which travels over ...
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Use a current sense transformer to step-up for a photoflash capacitor charger?
I need to charge a capacitor up to 640 V (from a 3V) source for an embedded systems project I'm working on. I've considered other options, such as voltage multipliers and Hulda-Clark based zapper ...
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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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Will USB-PD work with and extension cable in the circuit?
I want to replace the USB type A port on my trucks dash with a USB-C panel mount and give it the ability to "fast charge" my phone. Unless there is a product that I am overlooking it seems I ...
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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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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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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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How does this half bridge inverter charger charge the battery?
I just can't understand how this inverter charger actually charges the battery. The charging circuit uses two SCRs on the mains side of the transformer. The same transformer is also used to step up ...
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charging circuit for series coin batteries
I am designing a circuit that will be powered by two rechargable coin cells in series, and I need to include a module to recharge them in-situ.
I have had a look on RS at the range of rechargable ...
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Proper algorithm to charge Li-ion batteries
We are going to develop a new Li-ion battery UPS circuit for our handheld. I have read couple of articles and almost all of them recommend to charge the battery based on the following curve. I have ...
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Possibly connect second charger to Lithium Iron Phosphate battery
I have a sump pump system that includes a 12 volt backup sump pump. It is managed by this Pump Spy system: https://www.amazon.com/PumpSpy-PS2000-Battery-Internet-Monitoring/dp/B07N8FY4L9
I have a ...
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