TP4056 is a Lithium iron rechargeable battery charge controller IC. The TP4056 IC is providing full constant voltage and constant current characteristics for charging a single 3.7 volt Lithium cell or battery. The TL4056 is ideal chip to do the function. It's charging rate or charging current could be controlled by external resistor on program pin. It has both charging and charge complete sink type input pins where two different color LEDs could be connected to show the status of the chip. The TP4056 IC comes in SOP package and it needs very few external component to function. The less external components and its small size makes it ideal and the best choice to be used in portable applications.
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| TL4056 IC typical charger circuit |
TP4056 can be used in usb applications wall mounted power packs. tp4056 don't need a blocking diode to prevent battery reverse current flow due to internal chip mosfet arrangement. tp4056 has internal thermal protection which prevents chip during high current and high temperature operation or in high ambient temperature. tp4056 output charging voltage at battery terminals are fixed to 4.21V or 4.2 volts. The current rate could be set by a single external resistor. When the charging current reaches to 1/10th of the charging current, the chips stops charging it disconnects battery from charging source. For monitoring two status LED are provides which shows the charging state.
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| TL4056 or TP4056 charger arrangement |
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| TL4056 IC program current setting resistance values. |
The maximum charging current of the tl4056 chip could be programmed 1000mA or 1A linear. There is no need of external mosfet to charge the battery. The internal mosfet inside the chip is enough to accomplish the job. Tl4056 input voltage range is from -0.3V to 10V. TL4056 maximum junction temperature is 144℃ and the working temperature is -40 ℃～85℃
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| TP4056 SOP pakage |
TL4056 charge controller is widely used in digital camera, usb powered chargers, torch lights, battery operated toys, cellphones, cordless telephones, pda, GPS devices, portable devices, charging stations, stroboscope, digital oscilloscope battery powered, multimeters with chargeable batteries and many more.
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