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BQ25180: BQ25180

Sakthi K
Prodigy 130 points
Part Number: BQ25180
Other Parts Discussed in Thread: BQ25155, BQ25150, BQ25620,

Dear Technical Team,

   

Am reaching out to inquire about a suitable solution for our current project requirements.

We are currently working on the development of a wearable product that utilizes a 300mAh lithium-ion/  lithium polymer  battery operating at 3.7V. For this project, we have integrated the BQ25180YBGR Battery Charging IC to manage the charging process efficiently, with a charging rate of 1A and a load of 1A.

However, we now have a requirement to incorporate battery voltage monitoring into the same IC to enhance the functionality and monitoring capabilities of our device. We aim to simplify the design and minimize component count while ensuring reliable battery management.

Could you please suggest a suitable IC or solution that integrates battery voltage monitoring alongside the charging functionality compatible with our project requirements? We are particularly interested in options that offer seamless integration and efficient performance for wearable applications.

Additionally, if available, we would greatly appreciate any samples or documentation you could provide for evaluation and integration into our design.

Thank you for your attention to this matter. We look forward to your prompt response and collaboration on this project.

Best regards,

Sathiya

  • 0
    TI__Genius 17585 points

    Hi Sathiya,

    For your wearables application, would you be willing to consider a switching topology or would you only want to look at linear charging solutions?

    Best Regards.

  • 0 in reply to Juan Ospina
    Prodigy 130 points

    Hi Juan,

    Could you suggest which one is better?

  • 0 in reply to Juan Ospina
    Prodigy 130 points

    Switching topology- is better.

  • 0 in reply to Sakthi K
    TI__Genius 17585 points

    Hi Sakthi,

    For wearable applications typically linear topology is better due to the less noise, RF noise, and smaller solution size, however the switching offers better efficiency and may be more able to achieve all the requirements.

    In terms of charger families, I would recommend some of the following:

    - BQ2518x - it is a 1A linear charger capable of 1A Charge current and more than 1A discharge current so this would be one possible solution. However it does not provide an integrated ADC.

    - BQ2515x - This is a 500mA linear charger capable of 1.5A of discharge current with an integrated ADC as well as an integrated LDO rail. This integrates the requested features, however it is limited to 0.5A of charge current.

    - BQ2562x - Is a 3.5A switching charger capable of 3.5A of charge and discharge with an integrated ADC.

    Best Regards,

    Juan Ospina

  • 0 in reply to Juan Ospina
    Prodigy 130 points

    Hi, BQ2515x series ICs are not available and the cost of the BQ2562x series is high, am looking for alternative ICs that fulfill similar functions.

    Regards

    Sakthi

  • 0 in reply to Sakthi K
    Prodigy 130 points

    Hi, 

    We are currently in the process of developing a wearable device that requires specific power management features. After careful consideration of our requirements, we have identified the need for a battery management integrated circuit (IC) that can fulfill the following criteria:

    1. Charging Current: 1A
    2. Load Current: 1.5A
    3. Battery Voltage Monitoring: Integrated ADC functionality for accurate voltage monitoring
    4. Single Chip Solution: Compact and integrated solution to optimize space in our wearable device

    Regards,

    Sathiya

  • 0 in reply to Sakthi K
    TI__Genius 17585 points

    Hi Sakthi,

    The BQ25155 should be available. Are you having issues ordering them?

    Best Regards.

  • 0 in reply to Juan Ospina
    Prodigy 130 points

    Hi,

    BQ25155  is available, let me check .

    Regards,

    Sakthi

  • 0 in reply to Sakthi K
    Prodigy 130 points

    Hi Juna,

    BQ25155 ok, but it's does not have LDO with 1Amp output. so, we use DCDC converter after BQ25155 output for stable output. 

    We are expecting. 

    1. Charging Current: Min 500mA to Max 1A
    2. Load Current: Min 1A to Max 1.5A
    3. Regulated output fixed 3.3V output. 
    4. Battery Voltage Monitoring: Integrated ADC functionality for accurate voltage monitoring
    5. Single Chip Solution: Compact and integrated solution to optimize space in our wearable device.

    Regards,

    Sakthi

  • 0 in reply to Sakthi K
    TI__Genius 17585 points

    Hi Sakthi,

    The BQ25155 can provide a 1 Amp discharge current from the PMID load. The LDO integrated is for lighter loads, typically MCUs, with 150mA of current draw. We don't provide any chargers with integrated 1A rails, so discrete DCDC converter may be needed regardless of your selected charger.

    The BQ25155 would still offer the 500 mA charge current with an integrated ADC in a compact design.

    Best Regards,

    Juan Ospina

  • 0 in reply to Juan Ospina
    Prodigy 130 points

    Hi Juna,

    is there any other alternate Parts available in Ti for our requirement.

    Regards,

    Sakthi

  • 0 in reply to Sakthi K
    TI__Genius 17585 points

    Hi Sakthi,

    Unfortunately there isn't any integrated part that covers all of these requirements. A charger with 0.5-1A charging, integrated ADC and a 1A integrated DCDC converter isn't present in our portfolio.

    The provided earlier devices of the BQ25180, BQ25150, and BQ25620 are our closest approximates, though they would require some discrete devices to cover all the requirements. Would you be willing to consider a discrete solution for your application?

    Best Regards.