Product Features and Parameters

 

◆Up to 1A programmable linear charging current ◆For single-cell 3.7V lithium battery, fully charged with 4.2V

 

◆Constant current/constant voltage charging, with over temperature protection ◆Soft start to limit inrush current, with battery reverse connection protection ◆Low power standby, prolong battery life

 

◆Dual output of charging status, no battery and fault status display ◆Can be activated by 0V, 2.9V trickle charging ◆Working temperature -40~80℃

 

◆Input voltage range 4.2V~6.5V ◆Output voltage 4.2V-28V adjustable ◆Maximum power 5W

 

Self-charging current setting

 

The module can set the charging current by itself. Please refer to the following methods for details. Technical support is not provided.

 

Change the resistance value of the resistance in the circle on the left to change the charging current. The resistance package is 0603. Note that there is a risk in modification. If there is a problem, our shop is not responsible. Below are the formulas and examples.

 

Charging current limiting resistor R=1200/1 (l is the current that needs to be set)

 

Resistance value (K) 30 5 2 1.2

 

Charge current (mA) 50 250 580 1000

 

Description of the charging indicator

 

The module can roughly judge the working state by two LEDs, etc. CHRG is red light, STDBY is blue light. When the battery is charging, the red light is on, the blue light is off, the blue light is on when the battery is fully charged, and the red light is on. If there is a boost output, it will be different according to the output power. It is possible that the red light will always be on when charging. When the load is not connected, the blue light is on, and the red light is slightly on.

Instructions for use

Output voltage adjustment potentiometer

 

VO+VO. IN-IN+

 

output input

 

LX-LCBST

 

VO+ Vo B+ B- T point

 

battery output battery

 

The module supports type-c interface input and solder joint input of back annotation input. You can choose one, the recommended voltage is about 5V. The module is marked with two outputs. The two outputs are the same, and the lines are connected in parallel. You can choose one of them. The following focuses on connecting the battery.

 

If your battery comes with its own protection board, you can choose our package without discharge protection. After the battery is connected to B+ and B-, you must short the T point to charge and discharge.

 

If your battery does not have a protection board, choose a package with discharge protection. This is very important, because over-discharge of the battery is likely to cause the battery to be scrapped. Most of similar competitive products do not have discharge protection. After -, the T point cannot be shorted, otherwise the discharge protection will be invalid.

 

After connecting the wires, you can use a screwdriver to adjust the output voltage you want.

 

The battery chooses 3.7V lithium battery, and the full voltage is 42V. The battery type can be 18650 polymer and other batteries.