2A lithium battery charging board 4.2v8.4v12.6V synchronous rectifier DC-DC antihypertensive module High efficiency high efficiency

Detail introduction

1: Single -section lithium battery 4.2V, 2 string of lithium battery 8.4V, 3 string of lithium battery 12.6 universal, short -connected solder joint adjustment charging voltage

2: 4-20VDC ultra-wide voltage input

3: Synchronous rectification drop-down DC-DC ultra-high efficiency ultra-low heat

4: When not installing a battery

5: High frequency low internal resistance

6: Super low sampling resistance, the voltage is only 25mV

7: Safety timer 12 hours

8: Integrated large current small volume inductance, full -closed magnetic low loss, low interference

9: Excessive protection, full of self -stop (indicator light)

Basic parameter

Voltage: 4-20V (Recommended 16V)

Current: 2A

Size: 18.6x18.6mm

Weight: 2.4G

Current settings

The current sampling voltage is 0.025V

Charging current = 0: 025/sampling resistance resistance value

The sampling resistance is the R012 of the board, the resistance value is 0.012R, you can buy and replace it yourself

Remove the indicator light failure

1: LED indicator light flash:

No battery access, battery or protective board failure.

2: LED indicator light slow flash:

Excessive protection of charging board; input power protection; lithium battery protection and protection status

It may be triggered underneath.

3: LED indicator lamp:

Charging has been completed

1: Charging 1 lithium battery, such as "4.2V 2800MA" cannot reach 2A charging current, only 1.5A is the most.

2: When the charging current is greater than 1.5A, it is necessary to add a heat sink to avoid overheating cause the internal heat protection, or burn the charging board, and the common indicator light flashes.

3: This board is constantly charging. If the battery is placed, when charging, the current can reach 2A. After the battery voltage is risen, the charging current decreases accordingly.

4: When adjusting the charging voltage, the charging board cannot install the battery and input power, otherwise it will damage the board.

5: Do not touch any part of the board when working in the charging board, otherwise the human body's electrostatic will damage the chip.

6: The smaller the voltage difference between the lithium battery of the power box, the larger the charging current.However, the charging power supply must be met, and the voltage difference between the full power voltage of the battery is not less than 0.3V when the load is loaded.

Note: 1: The battery must be connected to the protective board, and then the charging board 2: The input voltage must be greater than the output voltage