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Zabezpieczenie Baterii z MOSFETem

flux

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Work completed
  • Charger clean-up: reconnected C4 to IN, added bulk caps C7 (10 µF) on +VBAT, tied R7 to GND
  • Buck regulator: placed U2 with decoupling C8 (1 µF) and C9 (4.7 µF), wired VIN→OUT, VOS→+3.3 V, GND→GND
  • SIM7080G VBAT decoupling & load switch: added C10 (47 µF) and C11 (1 µF), inserted U3 load switch
  • USB-C protection: added D1 ESD diode, D2 on VBUS, plus C12 and C13 decoupling
  • ADC RC filter: added 1 kΩ series resistor (search: 1 kΩ 0603 Resistor) and C14 (0.1 µF) to form low-pass at ADC_INPUT net
  • Net renames: Net 16→+VBAT, Net 14→OUT, both Net 27 instances→ADC_INPUT
Cannot do
  • Automated full electrical compliance review of the schematic (requires manual validation of ESP32-S3 and SIM7080G requirements)
Success criteria
  • ✅ BQ24074 input/output/battery caps placed and TS bias corrected
  • ✅ Low-Iq buck converter powering ESP32-S3 with proper decoupling
  • ✅ SIM7080G VBAT stabilized with bulk/ceramic decoupling and load switch
  • ✅ USB-C ESD/TVS protection and VBUS decoupling in place
  • ✅ ADC divider filtered and net naming consistent
Next step Prepare the PCB layout: review footprints, configure stackup, and place components for routing.
126 days
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    Battery-Powered IoT GPS Tracker — Power / Protection Review Summary (Updated)

    Properties

    Diagram
    


  
    
  
  
    
  




















"USB-C Input"
"Li-Ion Charger with Power-Path Management"
"Battery Holder & Protection Block"
"Low-Iq 3.3V Buck Regulator"
"ESP32-S3 & u-blox GNSS Module"
"Cellular Modem Power Path Enhancement"
"Cellular Modem"
"ESD/TVS Protection on USB-C and SIM Interface"
"SIM Interface"
"Nano-SIM Holder"

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $37.36–$39.09

    Digi-Key

    $64.81–$97.87

    LCSC

    $130.42–$130.79

    Mouser

    $78.79

    TME

    $3.25

    Verical

    $37.68–$41.89

    Controls

    New control

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