Does the TP4056 Li-ion charger have protection against reverse connection of cel

Question

Hello, has anyone checked on their own skin if the TP4056 charger with over-discharge protection below 2.5 V has protection against accidental polarity reversal of the connected cell. It's about the layout as in the first photo. I found out on my skin that the cheaper version with reverse...

jarek_lnx · Accepted Answer

In the photo you have described that the protection is DW01A, in which the documentation is that the supply voltage cannot be reversed, so it will probably shoot first.

E8600 · Answer

Exact diagram.
There is a double mosfet, but it will protect the TP4056 system itself in this case.

I have already burned 2 x TP4056 without protection. Maybe there will be someone who tried the "secure" version.
After damage, the system gives the same voltage at the output as at the input and the LEDs stop shining.

jarek_lnx · Answer

I did not take into account R5 - it will limit the current when connected in reverse so the DW01A will not be damaged.

krzysiek_krm · Answer

Logically, a reverse energized protection circuit will not drive any of the mosfets. Since they are anti-series connected, they will open the circuit.

E8600 · Answer

Yes, but it is not known if the resistor is sufficient protection for the DW01A in reverse polarity. Even when discharged, Li-ion cells have high currents.

krzysiek_krm · Answer

If I were you, I would make some modifications to this system, supported of course by previous experiment. The supply current of the protection circuit is at the level of a few uA, I think that this protection resistor can be increased to a value, say 1 k?, which will limit the current to a few mA with a charged cell. This voltage drop will slightly disturb the detector's operation, but it will be at the level of a few mV, I think you can get over it. Additionally, you can solder a low-power Schottky diode with a low voltage Vf on the filtering capacitor, which will protect the circuit against excessively negative supply voltage.

modziul · Answer

Old topic but this happened to me today. Instead of connecting the wires red red black black, of course I connected red black red black. Nothing sparked, nothing burned. The device didn't work. After looking at it, I noticed an error and resoldered the wires from the cell. The device still didn't work. No output voltage. I connected the charger, the charging LED turned on and the voltage appeared on the output. The module works properly, the LEDs work and show charging and its end. Presumably, the over-discharge protection also works, but I can't check it because the device also turns off at about 2.5V.

Does the TP4056 Li-ion charger have protection against reverse connection of cel

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Didn't find an answer? Ask Artificial Intelligence

Topic summary