Over-discharge protection feature which prevents the battery from being discharged below 2.4V by cutting off output power until the battery is recharged above 3V. The IC also has a temperature input pin from which we can connect a temperature sensor NTC type. The temperature sensor must be attached with the body of the battery to detect the temperature of the battery while charging. The IC is also programed to disconnect the charging when the battery temperature goes above from a limit set inside the IC’s program. The module is also having two indicators LEDs also marked in the module pinout & details above. One LED indicates the battery charging in progress and when the battery become full charged it automatically gets deactivated and the another LED will become activated to indicate that the battery is fully charged.

programming charge rate or 1C; this is the maximum charging rate for the chip. If your battery is not 1000mAh (1Ah), The charging current is 1A and it is adjustable. You can change it by connecting a resistor of 1kΩ at IN- pad. The output charging current of the module can be controlled by a single resistor shown in the above module image. For getting a desired current you have to change this resistor according to your charging current requirements. Here is the list in which you will find which value of resistor will provide how much maximum output current to the battery. Resistor Value Outputs positive voltage from USB cable to charge to battery. It should be connected to the positive of the battery

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As mentioned earlier, very few external components are required for building a complete Li-Ion Battery Charger circuit using the TP4056 IC. The following image shows the circuit diagram of one such implementation. PROG: The charge current to the battery is set by connecting a Resistor called R PROG between this pin and GND. Based on the value of the resistor, the charge current can be anywhere from 130mA to 1000A. The problem I'm having is that it works perfectly with a "USB-A male to USB-C male", but it doesn't work with a "USB-C male to USB-C male" cable. It also doesn't work with a "laptop USB-C charger" which does do 5 V. By default the charging current of the module will be 1A, it can be controlled by adjusting the resistor R PROG (R3 on module) shown in the circuit diagram. More details of the same can be found in the datasheet of the TP4056 given below.

CHRG: When the battery is charging, this pin is pulled low. An LED is connected to this pin to indicate battery charging. This chip will not activate for battery voltage level problems (unless the TP4056 fails) since the TP4056: These pins are used to charge the battery by providing +5V at IN+ and -5V at IN- terminals when you don’t have a USB cable. Otherwise, you can directly charge from USB supply by using a USB cable. Pin#7 Red and Pin#8 Green LED STDBY: When the battery is completely charged, this pin is pulled low. An LED is connected to this to indicate standby mode.BAT: It is the battery connection pin connected to the positive terminal of the battery. The voltage at this pin is 4.2V. These two LEDs indicate the status of charging. When a battery is charging, Red LED glows, and when it is fully charged, the Green LED turns on. TP4056 Features Using TP4056 module is very simple for providing input power to the circuit you can use a 5V 2A charger or you can also connect it with any USB outlet. Alternatively you can also connect a 5V 2A supply with the input terminals of the module. Almost all the electronic devices and gadgets run on battery power now-a-days. You can find many devices like Mobile Phones, Tablets, Laptops, Cameras, etc. that run on battery. NOTE: This module and the circuit shown above doesn’t include the temperature measurement. Charging an 18650 Lithium Ion Battery with TP4056

Lithium-ion battery charging and discharging module which supports a constant current – constant voltage charging mechanism. As mentioned earlier, the PROG (Pin 2) is used to control the charge current to the battery. It is controlled with the help of a resistor called R PROG. The following table shows a list of charging current values for the corresponding R PROG values. Based on the TP4056 Lithium Ion Battery Charger Controller IC and the above shown circuit diagram, several Li-Ion Battery Charger Modules are developed. The following image shows the module used in this project. never be connected the wrong way round at the "charger input". At the other side the DW01A does not protectIt is a tiny module with all the components mentioned in the above circuit diagram. If you notice, there is a Micro USB connector at the input side of the board. Using this, you can charge a Li-Ion battery from an USB source. The closest schematic I can see is from link, which shows it for a Micro USB, but it appears in all intents and purposes to be the same (it's a generic module) Using the TP4056: There's a right way, and a wrong way for safe charging of Lithium Ion batteries with this chip! After connecting the supply connect the 3.7V lithium ion cell you want to charge with the battery connections points shown in the image above. The li ion cell should be connected in right polarity or the cell or charger may damage.