TP4056 LiPo Charger LS

1 month ago

Profile:Li-Ion/LiPo battery charging and protection board with USB-C port and load sharing power path control.

Open source license: CC-BY-SA 3.0

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Description

Li-Ion/LiPo battery charging and protection board (25.4mm x 17.8mm) with USB-C port and load sharing power path control.

IMG_20210819_113534_x.jpg

For battery charging the TP4056 (U1) is used. The TP4056 is a complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries. The charge voltage is fixed at 4.2V and the charge current (max 1000mA) can be programmed externally with a single resistor (R3). The TP4056 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. Other features include current monitor, under voltage lockout and automatic recharge.

For the battery protection (overcharge, overdischarge, overcurrent and short circuit protection) the DW01A (U2) is used in combination with an FS8205 dual MOSFET (Q1). The DW01A is constantly measuring the voltage across the battery and the current flowing in (when charging) or coming out (when discharging). If something goes wrong it takes the battery out of the circuit by closing the MOSFET which acts like a switch between the negative side of the battery (B-) and ground. The overcurrent protection works by comparing the voltage drop across the MOSFET with the internal 150mV reference of the DW01A. As the RDS(on) of the FS8205 is around 2x25mOhm, so the DW01A closes the MOSFET at a current of 150mV/50mOhm = 3A.

The load sharing power path control (Q2, D1, R6) interrupts the connection between the battery and the load when an external power supply is connected. In this case, the load is powered by the external power supply while the battery is being charged. This protects the battery and increases its lifespan.

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LiPo Charger LS

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LiPo_Charger_LS_v1.0

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BOM

ID Name Designator Footprint Quantity BOM_Manufacturer Part BOM_Manufacturer BOM_Supplier BOM_Supplier Part
1 100n C1,C3 C_0603 2 CC0603KRX7R9BB104 YAGEO LCSC C14663
2 10u C2 C_0603 1 CL10A106KP8NNNC SAMSUNG LCSC C19702
3 SS34 D1 DIODE-SMA(DO-214AC) 1 SS34 MDD LCSC C8678
4 VIN H1 HDR-1X2/2.54 1 2.54-1*2PFemale BOOMELE LCSC C49661
5 BAT H2 HDR-1X2/2.54 1 2.54-1*2PFemale BOOMELE LCSC C49661
6 VOUT H3 HDR-1X2/2.54 1 2.54-1*2PFemale BOOMELE LCSC C49661
7 CHRG LED1 LED_0603 1 KT-0603R KENTO LCSC C2286
8 DONE LED2 LED_0603 1 19-217/GHC-YR1S2/3T EVERLIGHT LCSC C72043
9 FS8205 Q1 SOT-23-6 1 FS8205 FORTUNE LCSC C32254
10 DMP1045U-7 Q2 SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR 1 DMP1045U-7 Diodes Incorporated LCSC C177033
11 1k R1,R2,R4 0603 3 0603WAF1001T5E UniOhm LCSC C21190
12 1k2 R3 0603 1 0603WAF1201T5E UniOhm LCSC C22765
13 100R R5 0603 1 0603WAF1000T5E UniOhm LCSC C22775
14 10k R6 0603 1 0603WAF1002T5E UniOhm LCSC C25804
15 5k1 R7,R8 0603 2 0603WAF5101T5E UniOhm LCSC C23186
16 TP4056 U1 SOP-8_EP_150MIL 1 TP4056 TPOWER LCSC C382139
17 DW01A U2 SOT-23-6 1 DW01A FM LCSC C85680
18 USB-TYPE-C-6PIN USB USB-C-SMD-6P 1 TYPE-C-31-M-17 Korean Hroparts Elec LCSC C283540

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