Electronics > Beginners
TP4056 - Under Voltage Lockout circuit
made2hack:
Hi all,
I was wondering how I would implement an undervoltage lockout circuit using the TP4056. Is it even possible?
Essentially I want the device to power off or cut-off power coming from the battery once the battery reaches 3.0 V (or whatever the undervoltage lockout is).
The datasheet states that it offers under voltage lockout, but I'm not sure where? What pin? How would I implement it?
I have the little charger board you can buy on ebay.
Thanks
strawberry:
Can be used pin8(CE) to enable/disable the chip
Can be used mosfet to turn off 5V power
sleemanj:
Wrong product. Tp4056 is a charger, it has nothing to do with discharge. Uvlo on tp4056 will mean it will not charge if the cell is very dead (without checking datasheet).
What you want is the dw01 and 8205a combination cell protection.
Some boards jnclude both 4056, and dw01+8205a for charge and protection in one
made2hack:
Ah ok,
so what is meant is that the chip won't charge if VBat < 3.0 (or whatever the UVLO setting is).
rt:
--- Quote from: made2hack on June 21, 2017, 02:19:55 pm ---Ah ok,
so what is meant is that the chip won't charge if VBat < 3.0 (or whatever the UVLO setting is).
--- End quote ---
Not quite. If VBat < 3.0 then the TP4056 will trickle charge the cell at I_trckl which is about C/10 (approx 100mA for a 1Amp setup, e.g R_prog=1.2K) until cell voltage exceeds V_trckl (2.9-3.0V).
--- Quote from: sleemanj on June 20, 2017, 09:54:26 pm ---What you want is the dw01 and 8205a combination cell protection.
Some boards jnclude both 4056, and dw01+8205a for charge and protection in one
--- End quote ---
+1
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