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    Answered
  • RE: BQ25505: Using BQ25505 as a power converter with variable output voltage

    Juan Ospina
    Juan Ospina
    Resolved
    Hi Kaveh, The BQ25570 uses the same boost topology as the BQ25505 and BQ25504 which requires that VBAT_OV be greater than VIN_OC. It just integrates a buck for load rail regulation. Best Regards, Juan Ospina
    • 11 months ago
    • Power management
    • Power management forum
  • BQ25505: Doesn't start up after a short voltage drop/undervoltage lock

    Daniel E.
    Daniel E.
    TI Thinks Resolved
    Part Number: BQ25505 Tool/software: Hi there I'm using the BQ25505 for a small IoT-Device with a rechargeable battery and I'm having the problem that after a short voltage drop at VBAT_SEC from a battery disconnection (some few milliseconds), the…
    • 9 months ago
    • Power management
    • Power management forum
  • Answered
  • BQ25505: review schematics and ask the application questions

    Henry Wang3
    Henry Wang3
    Resolved
    Part Number: BQ25505 Other Parts Discussed in Thread: BQ25570 Tool/software: Hi Sir, My customer is designing the BQ25505 and using a photovoltaic (solar) to the DC source. Could you please review the schematics and reply the below questions? Design…
    • Resolved
    • 10 months ago
    • Power management
    • Power management forum
  • Answered
  • BQ25505: Power harvesting chip with small package size

    Kaveh Mohammad
    Kaveh Mohammad
    Resolved
    Part Number: BQ25505 Other Parts Discussed in Thread: BQ25504 Tool/software: Hi, I am looking for a PMIC similar to BQ25505 that can be used for power harvesting from a solar cell and storing energy into a battery. I need the device to have a small package…
    • Resolved
    • 11 months ago
    • Power management
    • Power management forum
  • BQ25505: Energy harvester with small indoor solar cell for USB C charging (BQ25504, BQ25505, BQ25570)

    Chris Dreessen
    Chris Dreessen
    Part Number: BQ25505 Other Parts Discussed in Thread: BQ25570 , , BQ25504 Hi, my end goal is building a USB C charger (for an eInk device) that is powered by a solar cell (ca 300 cm^2) in indoor lighting conditions. The ouput power of the solar cell is…
    • over 1 year ago
    • Power management
    • Power management forum
  • RE: BQ25505: The selection issue of chips

    Tonyx.wu
    Tonyx.wu
    Not considering this condition 1. Solar panel input voltage: 4.5V or above (standard 5V) BQ25570RGRT, BQ25505RGRT, BQ24650RVAR, TI-BQ25504, TI-BQ25505 According to my request, which chip would be the most suitable and cost effective option to choose?I…
    • over 1 year ago
    • Power management
    • Power management forum
  • Answered
  • BQ25505: BQ25505 with reverse polarity battery connected

    Kaveh Mohammad
    Kaveh Mohammad
    Resolved
    Part Number: BQ25505 Hi, I am using BQ25505RGRT in my design. What will happen if a battery with reverse polarity is connected to this chip? I am not going to use series diode with my battery for reverse polarity protection, because of the voltage drop…
    • Resolved
    • over 1 year ago
    • Power management
    • Power management forum
  • BQ25505: BQ25505 VSTOR cannot output voltage to the load

    Star Xu
    Star Xu
    Part Number: BQ25505 Hi I have a query need your help. VBAT_SEC is connected to the battery 3.8V. Initially, there is no load and the voltage can be output normally, and then the voltage can be output normally when connected to the load. Initially, there…
    • over 1 year ago
    • Power management
    • Power management forum
  • Answered
  • BQ25505: Vin detect accuracy

    Given Ding
    Given Ding
    Resolved
    Part Number: BQ25505 Hi Team, To my understanding, the first stage of boost is to achieve MPPT, then Vin of boost is regulated, right? Then Vin sense accuracy is important, what's the accuracy of Vin sense and is Vin sensed by Vin_DC pin? Thanks.…
    • Resolved
    • over 1 year ago
    • Power management
    • Power management forum
  • Answered
  • BQ25505: Inquire about BQ25505 or BQ25504 differences and design

    JP PARK
    JP PARK
    Resolved
    Part Number: BQ25505 Other Parts Discussed in Thread: BQ25570 , BQ25504 , Hello. The BQ25570 circuit I asked you about earlier works well because the problem has been solved. When applying mass production products, the circuit is changed, so the output of…
    • Resolved
    • over 2 years ago
    • Power management
    • Power management forum
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