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BQ25180: BQ25180YBGR

Sakthi K
Prodigy 130 points
Part Number: BQ25180

Tool/software:

Hi Team,

 We are currently designing a system that incorporates the BQ25180YBGR power management IC and are seeking detailed information to accurately assess its performance within our application.

Could you please provide us with the following details:

Power Budget Analysis:

Guidance on calculating the power budget for the BQ25180YBGR, considering typical input voltage (VIN) and output voltage (VOUT) conditions.
Any specific considerations or efficiency figures that would impact our power budget calculations.


Total Current Consumption:

Static and dynamic current consumption specifications under typical operating conditions.
Any relevant details on current consumption profiles or conditions affecting current draw.

how to calculate power  budget and current consumption? with example.


We value your expertise and look forward to your prompt response. 

Best regards,

Sathiya

  • 0
    TI__Genius 17725 points

    Hi Sathiya,

    Sakthi K said:
    Guidance on calculating the power budget for the BQ25180YBGR, considering typical input voltage (VIN) and output voltage (VOUT) conditions.
    Any specific considerations or efficiency figures that would impact our power budget calculations.

    With linear chargers, your output current should equal your input current minus input quiescent current so you can expect it to be less by 0.75 - 1 mA. Additionally, Ron_in for the input FET can increase with temperature but is 270mOhms typically. Since the output voltage regulation is configurable efficiency would vary based on that configuration, but highest efficiency would be achieved by setting SYS_MODE to pass-through. This is while your input source is present.

    With charging, the voltage difference between SYS and BAT may cause losses as well as the Battery FET regulates voltage and current from SYS to battery, though the Ron_bat is lower for this FET. Again efficiencies can be a factor of SYS mode configurations.

    Sakthi K said:
    Static and dynamic current consumption specifications under typical operating conditions.
    Any relevant details on current consumption profiles or conditions affecting current draw.

    The device quiescent currents (IQ_IN, IQ_BAT, IQBAT_SHUTDOWN, IQBAT_SHIP) represent current draw from the input and battery. Input and battery current available at VSYS thus is equal to the input current limit (either determined by the ILIM setting or the input source) plus the battery current limit (BATOCP). It's important to analyze this from both peak current limitations as well as average current consumption. Some losses are also related to the FET Rdson for both the input FET and battery FET. I would begin by looking at what your input source is, and its power capabilities, as well was what your SYS voltage and current requirements are, while accounting for quiescent current and FET related losses. 

    Best Regards,

    Juan Ospina