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  • RE: TPS65721: How to detect Battery Low?

    What are you powering with TPS65721 other than the battery? I would like to be sure that we make the correct PMIC recommendation before going into more detail.
    • Answered

  • RE: TPS65721: 2.25 MHz buck followed by an LDO

    Resolved
    LDOs always clean up power supplies. They never introduce noise. The Buck is not always switching at 2.25 MHz. See the Power Save Mode section on page 25 of the TPS65721 datasheet. The default operation is that power save mode, or PFM, is allowed…
    • Answered

  • TPS65721: DCDC won't turn off :(

    Resolved
    Part Number: TPS65721 Other Parts Discussed in Thread: , TPS65217 , TPS65218D0 My goal is to have DCDC1 turn off, once the battery has finished charging from AC (the AC will remain connected). But I can't get DCDC1 to turn off if AC is live. Setup…
    • Resolved

  • RE: TPS65721: Transient behaviour of the internal LDO

    Hi Lasse, Figure 38 in the datasheet shows a transient responses for the LDO: www.ti.com/.../tps65721.pdf However transient response will also be affected by the value of the feed-forward capacitor recommended in section 9.2.2.1.2 Best Regards, Rick S…
    • Answered

  • TPS65721: Unusual current draw after dead battery

    Resolved
    Part Number: TPS65721 Hi, Does this chip can read the battery voltage ? I have went through the datasheet but couldn't figure it out.
    • Resolved

  • RE: TPS65721: can I use it to supply my circuit from the battery?

    Amilcare, On the TPS65721, VSYS1..VSYS0 = 10b, meaning "10 = the output voltage of the power path at pin SYS is regulated to 5 V" VSYS cannot provide 3.3V, but it is regulated. As a result, DCDC1 is your best choice to generate 3.3V LDO1 would…
    • Answered

  • RE: TPS65721: Interrupt Operation

    Resolved
    Adam, my apologies, I did not see your questions come in. It's best to monitor IRO, IR1 and IR2 registers. These registers will provide you with status information. As for as periodic status checks, it really up to you. You will receive an INT (Interrupt…
    • Answered

  • RE: TPS65721: How to set K_SET for setting charge current

    Resolved
    An example of how to set a fast-charge current (ICHG) of 20mA would be first to set a constraint, since otherwise there are a lot of options. The minimum RSET value is 700 Ohms, which is stated in the Recommended Operating Conditions (ROC table) on…

  • TPS65721: Resetting IC

    Part Number: TPS65721 Hi, What is the best way to reset the IC in case of lockup? Pushing the PB_IN will disable the LDO and DCDC, but is there any way to reset the charger portion or IC? Thanks, Josh
    • Answered

  • TPS65721: First Power Up clarification

    Resolved
    Part Number: TPS65721 Hi, I just wanted some clarification on the first power-on requirements in section 8.3.10.6.1. The first part says first powerup can be done by pulling PB_IN low or valid AC input: This next section says that first power…
    • Resolved

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