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Lithium 2S-3S charging module, with balancing, Type-C, voltage booster
Charging module for 2S or 3S Li-ion/LiPo batteries, powered by USB Type-C with support for 5V and QC fast charging. Boosts voltage to 8.4V or 12.6V, offers cell balancing for 2S and adjustable charging current, up to 94% efficiency. Includes overcurrent, overvoltage and short circuit protections, with LED for status and error.
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2S and 3S Lithium battery charging module with USB Type-C port power supply that supports both standard 5V charging and QC fast charging. The module converts the input voltage to the appropriate voltage for 2S (8.4V) or 3S (12.6V) batteries and has a balancing function for 2S (3S does not offer the balancing option), ensuring fast charging with settable current by configuring the RISET resistor.
It has an efficiency of up to 94% and integrates multiple protections, making it ideal for projects involving rechargeable lithium batteries.
The module allows for charging current regulation and is equipped with overcurrent, overvoltage, short circuit, as well as input voltage and undervoltage protections. It is configured for 2S (8.4V) by default, but can be easily converted to 3S (12.6V) by removing the resistor and shorting the jumper.
The integrated LED indicates the charging status or a possible error.
The module also offers a temperature monitoring function by adding an external NTC that will stop charging if a certain temperature is exceeded.
IMPORTANT! The supply voltage must be lower than the discharged battery voltage!
Specifications:
Power input: Type-C QC or solder terminals
Power Supply: 5VDC or QC protocol
Compatible battery type: 2S (7.4V) or 3S (11.1V) Li-ion/LiPo
Charging current: Adjustable 0.5A – 1.5A, according to RISET resistor
Maximum power: 15W
2S charging voltage: 8.1V – 8.4V
3S charging voltage: 12.3V – 12.6V (configurable via RVSET)
Charging efficiency: Up to 94%
Cell balance: Yes, only 2S, using BM pin
LED indicators: red (charging), blue (completed or error)
Dimensions: 31 x 15mm
Use:
IMPORTANT! The supply voltage must be lower than the discharged battery voltage!
Connect the "+" and "-" terminals of the battery according to the markings.
For 2S, connect the BM pin between the two cells if the balancing function is desired.
Select package type:
Default set for 2S (8.4V).
For 3S (12.6V): remove the specific resistor and short the ROV point according to the diagram. The 3S configuration requires a QC charger capable of 9V.
Power input:
Uses Type-C port for charging. For 2S, a 5V 2A power supply is sufficient. For 3S, a 9V QC power supply is required.
Alternatively, power it through welded wires ( input voltage must be lower than battery voltage ).
2S: 5VDC
3S: 9VDC
Charging Voltage Setting:
| RVSET (Ω) | Voltage per cell | Total for 2S | Total for 3S |
|---|---|---|---|
| 1K | 4.05V | 8.1V | 12.15V |
| 68K | 4.2V | 8.4V | 12.6V |
| 120K | 4.15V | 8.3V | 12.45V |
| NC (not connected) | 4.2V (default) | 8.4V (default) | 12.6V (default) |
Charging current setting:
The current is adjustable by replacing the RISET resistor (e.g. 100K = 0.9A).
Formula : ICHG = 90000 / RISET.
| RISET (Ω) | Charging current |
|---|---|
| 180K | ~500mA |
| 120K | ~750mA |
| 100K | ~900 mA (default) |
| 68K | ~1.3A |
| 47K | ~1.9A |
| 30K | ~3A |
Set upload timeout:
68K = 4 hours, 120K = 12 hours, without resistor = 24 hours.
NTC setting:
Steps to activate NTC:
Replace the original resistor connected to the NTC with an 82KΩ one.
Connect a 100KΩ thermistor (B=4100) as follows: One end connects to the NTC point, the other end connects to ground (GND), usually on the adjacent pad.
Place the physical thermistor on the battery pack to detect the actual temperature during charging.
| compound | Recommended value |
|---|---|
| Internal NTC resistance | 82KΩ |
| External thermistor | 100KΩ (B=4100) |
| Link position | Between the NTC pad and GND |
LED Indicator:
Solid red = active charging
Off blue = full charge
Flashing blue = error
Package contents:
1x 2S/3S lithium battery charging board with Type-C input
Produs destinat utilizarii in proiecte electronice, automatizari, prototipare, educatie si cercetare.
Produsul trebuie utilizat numai conform specificatiilor tehnice mentionate in descriere si/sau in documentatia produsului.
Avertismente generale de siguranta:
Nu utilizati produsul la tensiuni, curenti sau temperaturi peste valorile specificate.
Montajul si conectarea trebuie realizate de persoane cu cunostinte tehnice minime in domeniul electric/electronic.
Evitati scurtcircuitele, inversarea polaritatii si conectarea gresita a alimentarii.
Nu lasati produsul alimentat nesupravegheat in timpul testelor.
Produsul nu este jucarie si nu este destinat copiilor.
Pentru modulele electronice, se recomanda utilizarea in carcase, panouri sau montaje protejate, dupa caz.
Identificare produs:
Denumirea produsului, codul/SKU-ul si caracteristicile tehnice sunt mentionate in pagina produsului si/sau pe eticheta ambalajului.
Producator / Importator / Distribuitor:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Website: www.sigmanortec.ro
Persoana responsabila in UE:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Documentatie si siguranta:
Pentru informatii suplimentare, fise tehnice, declaratii de conformitate sau instructiuni, ne puteti contacta la [email protected].
Reviews (1) - Review moderation
Eu l-am folosit in configuratie 3S, curent de incarcare setat la 500mA (nu cel default de 900mA) si incarca acumulatorii si de la alimentator de 5V/1A (spre deosebire de ce scrie pe site). La ceste setari se incalzeste doar putin peste ambient.
