All Questions
Tagged with dc-dc-converter battery-charging
69
questions
1
vote
1
answer
60
views
How can I protect a DC/DC converter when VIN is floating?
I'm using a L6902 (https://www.st.com/resource/en/datasheet/l6902.pdf) to charge a 4 cell lifepo4 pack (with a solid BMS).
Do I need a diode on the converter output (PACK+) to prevent the converter ...
- 13
0
votes
1
answer
35
views
How to tweak tp4056 module to run on 8v?
I have a tp4056 module:
How can I tweak it to run on 4v to 8v range (it's maximum voltage rating according to the datasheet).
datasheet
- 354
0
votes
2
answers
280
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How do DC/DC converters work as lithium battery chargers?
There's a lot of DIYs that utilize DC/DC converters to charge Lithium batteries. A quick Youtube search shows dozens of these DIYs. I was wondering how these home-made chargers work. Yes, DC/DC ...
- 103
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46
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Parellel configuration DCDC converter and 14 V battery
I have a converter which bucks a high voltage down to 14 [V] to power some low voltage electronics. However, there should also be a battery there which is crucial during the start-up procedure and can ...
0
votes
1
answer
41
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5V USB-Power without Battery makes MCP73832T toggle the LED
My schema works as long as the Battery is attached to it.
In fact, it even works if I disconnect the Battery - EXCEPT that the LED1 toggles in that case.
My intention is to use the circuit either
5V ...
- 103
1
vote
0
answers
88
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Buck converter programable CC with DAC
I am trying to implement a programable CC (Constant current) functionality into the utilized buck converter (AP64501SP-13). The converter is to be used for series cells charging. I need to be able to ...
- 1,679
1
vote
0
answers
72
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Desigining a 3S battery charger step-down buck converter
I'm a hobbyist, so my electrical engineering skills are not top notch.
I'm service tech and I'm working on modifying portable coolers (thermoelectric and compressor based) where we add batteries to ...
- 157
2
votes
3
answers
280
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How does applying an MPPT algorithm on a buck converter result in maximum current into the battery?
When an MPPT solar charge controller —in my case, based on buck topology— is charging a battery in constant current (CC) mode, the MPPT algorithm is applied to find the PV panel voltage (or input ...
- 135
0
votes
1
answer
50
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PoL DC/DC on a +12V bus with battery
I'd like to integrate a PoL DC/DC converter such as this one from Mornsun : KUB4812QB-10A
It will convert from a battery (48V) to an auxilary 12V bus on which will be connected a 12V Lead-Acid or ...
- 445
0
votes
1
answer
166
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Understanding the control loop in TI battery charger IC
I am trying to understand the control operation of this battery charger IC utilizing feed forward voltage mode control from TI: https://www.ti.com/lit/ds/symlink/bq24600.pdf?ts=1675420477371&...
- 143
1
vote
2
answers
610
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Adding a 24V battery to an existing 12V RV system with bidirectional charging
I recently purchased a new RV with a 12V system that has the following components:
A single lead acid battery
The usual 12V lights, pumps and other loads
A solar charge controller
A 120VAC to 12VDC ...
- 313
1
vote
1
answer
130
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Is it dangerous to charge gadgets at less than 5 V?
I'm using a solar panel, which gives me unstable current (from 0 to 9 V approximately), then I use a step-up converter to increase te voltage a little (my goal is to keep it between 7 and 12 V in ...
- 13
-1
votes
1
answer
345
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I have a variable input of 3V to 12V. How can I get a constant output of 5 volts?
In my project, I have an input of 3 volts to 12 volts DC, but I need a minimum 5 volts DC. If I use a 7805, it will not work under 7 volts. If I use a boost converter or buck converter, I can't ...
0
votes
1
answer
3k
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How to charge properly 3S Li-Ion battery pack?
I'm building a 3S 18650 Li-ion battery pack, which will be used for fast charging and discharging.
Unfortunately, I can't find a 3S battery charging board that is commercially available. I found out ...
- 13
0
votes
0
answers
185
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How can I accurately and quickly simulate this 280Ah battery charger circuit with a real-time charging time of over 2 hour?
So I am designing an on-board charger of rating 10kW in MATLAB simulink for an electric vehicle to charge a 72V, 280Ah battery with a maximum charging current of 125A. As the calculations work out, it ...
