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vikas Nagpal
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vikas Nagpal
Asked: May 16, 2023In:
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Hello, I’m running my TTGO ESP32 using a 163403.7 v 800mah battery. When measuring the battery with the device awake and the screen on the voltage is for example 3.0 v and when I put the device into deep sleep the ...Read more

Hello,

I’m running my TTGO ESP32 using a 163403.7 v 800mah battery. When measuring the battery with the device awake and the screen on the voltage is for example 3.0 v and when I put the device into deep sleep the battery rises to 3.2v. I’m using MCP130- 315HI/TO administrator to monitor the battery voltage and the issue is that the voltage drops below the administrator threshold and it pulls the reset low turning off the device but also when the device is off the battery voltage rises over the administrator cut off and powers the device back on causing the battery voltage to drop again and so on. Any idea how to get around this issue?

Thank You

Vikas Nagpal

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315hibatteryesp32mcp130poweredttgo
  1. ashishgawade

    Hello, A battery with lower ISR/advanced current capability might mitigate the issue because the drop/ rise of the voltage would be lower, ideally staying below the hysteresis of the battery covering chip, so that once the turn-off threshold is reached the voltage will not rise above the turn- on thRead more

    Hello,

    A battery with lower ISR/advanced current capability might mitigate the issue because the drop/ rise of the voltage would be lower, ideally staying below the hysteresis of the battery covering chip, so that once the turn-off threshold is reached the voltage will not rise above the turn- on the threshold by itself again.

    A beefy capacitor in parallel with the battery will also reduce the battery’s apparent impedance, reducing the amplitude of voltage drops caused by spikes in current consumption.

    Thank You

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vikas Nagpal
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vikas Nagpal
Asked: January 6, 2023In:
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Hii, I’ve built a sample board of a 2A colorless LED driver applying the LED2000 move-down converter with a single LiIon battery as the power source. Everything seems to be solved as it should, but I would like to try the ...Read more

Hii,

I’ve built a sample board of a 2A colorless LED driver applying the LED2000 move-down converter with a single LiIon battery as the power source.
Everything seems to be solved as it should, but I would like to try the circuit more thoroughly to ensure the design is robust.

Would anyone have pointers on how to test the circuit, what parameters to measure, and what warning signs to look for that may indicate that something isn’t performing optimally?

Thanks, Vikas

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batterycircuitledLED2000liionpower
  1. nidhi singh

    Hi, If you have a DC-coupled Current inquiry you can cover Inductor Current to check if it isn't working in the saturation region. Still, also you can check the switching pin with a voltage inquiry just to see a perfect waveform and measure the right switching frequency. Let me know. Nidhi Singh

    Hi,

    If you have a DC-coupled Current inquiry you can cover Inductor Current to check if it isn’t working in the saturation region. Still, also you can check the switching pin with a voltage inquiry just to see a perfect waveform and measure the right switching frequency.

    Let me know.

    Nidhi Singh

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ashishgawade
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ashishgawade
Asked: November 15, 2022In:
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Hello, What should be the voltage across VBAT and VBAT- of the M4Z32- BR00SH1 battery at the moment of purchase? However, can it be recharged? If it’s zero at the time of purchase. Thank You

Hello, What should be the voltage across VBAT and VBAT- of the M4Z32- BR00SH1 battery at the moment of purchase? However, can it be recharged?

If it’s zero at the time of purchase.

Thank You

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batterybr00sh1m4z32vbatvoltage
  1. Alex thomas

    Welcome, to the community! The voltage between both terminals should be nominally 2.8 V, below 2.0 V it should be considered discharged. The battery is based on lithium carbon monofluoride chemistry and isn't rechargeable. Does it answer your question? Regards Alex  

    Welcome, to the community!

    The voltage between both terminals should be nominally 2.8 V, below 2.0 V it should be considered discharged.

    The battery is based on lithium carbon monofluoride chemistry and isn’t rechargeable.

    Does it answer your question?

    Regards

    Alex

     

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Proptia
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Proptia
Asked: November 4, 2022In:
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Are the L9963E and L9963 battery control and balancing chips compatible with LiFePO4 batteries?

Hello, According to the datasheets for the L9963E and L9963, the country may be both “a Li-ion battery tracking and protecting chip.” There isn’t any specific point out that they might not paint with LiFePO4 batteries and it is doubtful if ...Read more

Hello,

According to the datasheets for the L9963E and L9963, the country may be both “a Li-ion battery tracking and protecting chip.” There isn’t any specific point out that they might not paint with LiFePO4 batteries and it is doubtful if ST includes LiFePO4 batteries under “Li-ion” batteries. Want to verify if LiFePO4 may be used with those chips.

Thank You

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batteriesbatterychipscontrolL9963L9963Elifepo4
  1. Alex thomas
    This answer was edited.

    Welcome, to the community! L9963 is formerly on NRND (Not Recommended for New Designs), new designs should use L9963E rather.LiFePO4 has a minimal discharge voltage of 2.0 V, a typical cell voltage of 3.2-3.3 V, and a maximum charge voltage of 3.60-3.65. L9963E covers a voltage range between 0.5-4.6Read more

    Welcome, to the community!

    L9963 is formerly on NRND (Not Recommended for New Designs), new designs should use L9963E rather.
    LiFePO4 has a minimal discharge voltage of 2.0 V, a typical cell voltage of 3.2-3.3 V, and a maximum charge voltage of 3.60-3.65. L9963E covers a voltage range between 0.5-4.6 V per cell, which thus includes LiFePO4, but should also be designed for it by the software of the advanced- position controller.

    Does it answer your question?
    Regards

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Anonymous
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Anonymous
Asked: October 29, 2022In:
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We want to develop a USB- C charger and we need to check the battery charge percentage of the device connected to the USB- C charger. The connected to de USB- C device can be a Smartphone, Tablet, or PC. In ...Read more

We want to develop a USB- C charger and we need to check the battery charge percentage of the device connected to the USB- C charger. The connected to de USB- C device can be a Smartphone, Tablet, or PC.

In our charger, we’re going to integrate a processor and we need to read the battery percentage of the device that’s being charged

Is it possible to read the battery percentage of the device connected by USB- C? Any ST reference can do this job?

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batterydevicetcppusbusb-cusb-pd
  1. nidhi singh

    Hello, Battery_status message can give the SOC of the sink. The info will be available only on the PD3 sink( designed with version> = PD3.0 v1.2). PD2 devices do not have similar communication. That information is handled in the dpm_user part and needs to be updated by the user/ customer. Best reRead more

    Hello,

    Battery_status message can give the SOC of the sink.
    The info will be available only on the PD3 sink( designed with version> = PD3.0 v1.2).

    PD2 devices do not have similar communication.
    That information is handled in the dpm_user part and needs to be updated by the user/ customer.

    Best regards

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