Hello,
I have implemented your MP2733 conponent on my board.
Here is my implementation:
The battery is a 3.7V li-ion 3000mAh
The VIN is connected to USB connector (VBUS)
The VOUT is connected to a DC/DC and the maximum current drawn by my board is 1A.
The MP2733 operates on its own (without USB), configured by the MCU via the I2C bus.
My problem is that after a while (several hours) that the MP2733 is connected to USB (VIN = +5V), the MP2733 cuts the output power supply (VOUT = 0V).
I don’t understand why the MP2733 does this.
The problem is that when this happens, my electronic board is no longer powered, and I’m in a perpetual state of stuck.
The only way for the MP2733 to re-power VOUT is to disconnect the battery, disconnecting the USB does absolutely nothing.
Do you have any idea why the MP2733 does this?
Is it a configuration problem?
Best Regards,
Here is the MP2733 configuration
Hello,
Apologies about the delayed reply.
Here are some possible causes for why this may be happening:
- Your battery protection circuit might be cutting off the battery due to low voltage or overcurrent, it might lead to the output voltage to go to 0V.
- Load transients could on the output could lead to temporary dips that could lead to an undervoltage or overcurrent condition.
Here are some things that you could try:
- Check the INT pin, as it would deliver charging status and fault interrupt signals. If there is a fault, REG0Dh would be the place to check the specific fault type. The IC also latches when this occurs. Shown is this register with each fault type:
- Monitor Input and output voltages when you have your IC on and monitor what the fault type is in this register to narrow down your issue.
Hope this helps,
Krishan
Hello,
Thank you for your reply.
I have already checked my battery. The protection circuit doesn’t cut off the battery.
I will try to read REG0Dh but it’s not easy, as the MP2733 cuts the power supply to my MCU.
I will keep you informed,
Best Regards,
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