3.7V Lithium Battery 5V Charging 2 Series And 3 Series Lithium Battery Boost Charging Module Supports QC Fast ChargingItem NO.: 2S3SQC

2 Series and 3 Series Lithium Battery Boost Charging Modules

Attention: 1. After receiving it, do not connect the battery and plug in the charging wire. If the red light is on, it is normal. 2. The charging board is only suitable for ternary lithium batteries, with a reference voltage of 3.7V and a charging cutoff voltage of 4.2V. Not suitable for use in iron lithium batteries.

Product features:

◆ Support QC fast charging

15W synchronous switch boost charging

Boost charging efficiency of 94%

◆ Can be set to charge 2 or 3 series of lithium batteries

◆ 2 series balanced charging

◆ Adjustable charging current

◆ Input overvoltage and undervoltage protection

◆ Adjustable charging timeout protection

◆ Output overcurrent, overvoltage, and short circuit protection

Product Introduction:

The module is suitable for two or three channel 3.7V lithium batteries through short circuiting settings, with a default of two strings. When two strings are used, the module's built-in battery balancing function can be used, which is very practical. The input can be done through the type-c port and solder wire. When the type-c port is connected to a fast charging power supply, the charging voltage is automatically adjusted to improve efficiency. If the input voltage is lower than the battery voltage during solder wire input, the module can only work in a boost state.

Attention! Normal use does not require too many module settings, just choose 2 strings according to your needs

Or 3 series charging is sufficient, unless you are using special and familiar with the application.

Product Description:

◆ Input: Optional Type-C port or solder input. Type-C connected to QC fast charging can automatically adjust the charging voltage and improve charging efficiency. If solder input is used, the input power supply should be less than the battery voltage (number of batteries in series * battery voltage).

◆ Output: Supports 2 and 3 strings. The battery needs to be equipped with a protective board, with a default of 2 strings. When changing to 3 strings, the short circuit contact needs to be short circuited, and then the adjacent resistor needs to be removed. When using 2 batteries, the balancing function can be used, and the two batteries are connected to the BM pin in the middle (this balancing speed is limited, so when using the two batteries, it is still necessary to ensure that the parameters are consistent as much as possible).

Current setting: The green arrow in the above figure indicates that the default current settings for two parallel connections are 100K (O.9A) and 180K (O.5A). Resistors can be removed or replaced according to personal needs. The calculation formula is current=90000/resistance value.

Battery charging cutoff voltage setting, default single string is 4 2V, this value is also applicable to most batteries and does not need to be changed. If changes are needed, refer to the RVSET settings table to set the board VSET resistance. Charging timeout setting, default no timeout time, set the ROT resistance value to set. 68K-4 hours, 120K-12 hours, non stick -24 hours.

◆ NTC connection: Not used normally. If necessary, change the NTC resistance value to 82K, and connect a 100K thermistor (B=410) to the NTC solder joint and adjacent GND

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LED indicator light: The normal red light remains on, the blue light is on during charging, and the blue light goes off when fully charged. The blue light flashes when an abnormality is detected..