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1.62 to 5.5V
tonylin

tonylin

1.62 to 5.5V
1y
4
Vled: 3.3V
tonylin

tonylin

Vdd: 1.8V
1y
tonylin

tonylin

Vled: 3.3V
1y
3
verify battery charging circuit and recommend any needed changes, how would i wi...
tonylin

tonylin

@copilot verify battery charging circuit and recommend any needed changes, how would i wire the battery to power the peripherals? also integrate the battery boost tps61221 to power the oled display
1y

copilot

To verify your battery charging circuit and integrate the TPS61221 boost converter for powering the OLED display, we'll first review the critical components and nets related to charging and power distribution. Your project includes the BQ24095DGQR for charging management and a TPS61221DCKR boost converter to elevate the battery voltage for peripherals requiring higher voltages.
Battery Charging Circuit Review
  • Battery Charging IC (IC3 - BQ24095DGQR): Connected to the battery (BT1), USB port (J1), and various passive components (R9, R10, D1) for charging control.
  • Battery (BT1 - VL-2330_HFN): Connected via net 18d31f0397240630c649f04d09580c08 for charging and net a4496bdc8124362bce8f45f6cb920116 for grounding.
  • Charge Status & Power Good (D1 & IC3’s ~PG pin): D1 connected to IC3's ~PG pin indicates charging status.
Recommendations & Integration Steps
  1. Ensure Proper Feedback Network for BQ24095DGQR: The BQ24095DGQR should have a proper feedback network, including ISET to adjust charge current and PRETERM to set the charge termination threshold. Check:
    • Connect R9 between J1:VBUS and IC3:IN for input supply. Already connected via Net 18d31f0397240630c649f04d09580c08.
    • Ensure R10 between BT1:(+) and IC3:OUT sets the charge current suitably. Already connected via 18d31f0397240630c649f04d09580c08.
    • Make sure R8 is properly setting the PRETERM charge termination condition via Net 48ebe8ea3929186fec02b93205705eff.
  2. Integrating TPS61221DCKR Boost Converter:
    • Input (VIN) Connection: Connect U2:VIN to BT1:(+), allowing the battery to directly supply the TPS61221. Since the VL-2330 is a lithium coin cell, ensuring its voltage matches the TPS61221's recommended operating range is essential.
    • Output (VOUT) Connection: Connect U2:VOUT directly to the OLED1:(5V), providing it with the boosted voltage.
    • Ground Connection: Ensure U2:GND is connected to the system ground, which looks to be managed via the various GND nets. Based on your schematic, ensuring a single connected ground network between BT1:(-), IC3:VSS_1, IC3:VSS_2, and U2:GND is necessary.
    • Feedback and Enable Pins: The feedback (FB) pin of U2 naturally connects to an internal voltage divider. You don't need to connect it externally unless you're adjusting the output voltage away from the default. For simplicity, leaving FB as is should be fine. Connect U2:EN to a GPIO on IC1 if you want software control over the boost converter or tie it to VIN for always-on operation.
    • Inductor and Capacitor: The TPS61221 requires an external inductor connected to U2:L and capacitors on both input and output for stable operation. Often, a value around 2.2µH for the inductor and 10µF for both input and output capacitors is a good start, adjusted based on your specific requirements and the TPS61221 datasheet recommendations.
Example Connections for TPS61221 Integration
  • Connect U2:VIN to BT1:+.
  • Connect U2:GND to BT1:-, IC3:VSS_1, and IC3:VSS_2.
  • Connect U2:VOUT to OLED1:5V.
  • Optional: Connect U2:EN to IC1 GPIO (for software control) or directly to BT1:+ for always-on.
Conclusion
Your charging circuit appears correctly configured for the BQ24095DGQR functionalities, with charging indication provided by D1 and proper feedback set by resistors. Integrating the TPS61221 requires direct connections to the battery for input and to the OLED for output, respecting ground coherence across the system. Ensure the TPS61221's peripheral components (inductors and capacitors) are chosen in line with Texas Instruments' datasheet to ensure stable operation.
1y
5
3.3V
C12
Capacitance
0.1µF
SCL-IO22
SCL-IO22
3.3V
U2
IC2
C5
Capacitance
0.1µF
C3
Capacitance
10µF
R6
Resistance
1kΩ
1.8V
3.3V
FB-VOUT
U1
SDA-IO21
1.8V
R5
Resistance
1kΩ
C4
Capacitance
10µF
C6
Capacitance
4.7µF
1.8V
C13
Capacitance
0.1µF
IC4
5V
SDA-IO21
VIN-EN
5V
1.8V
C8
Capacitance
0.1µF
U3
  • Ground
    Ground
    A common return path for electric current. Commonly known as ground.
    jharwinbarrozo
    20.5M
  • Net Portal
    Net Portal
    Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
    jharwinbarrozo
    43.0M
  • Power Net Portal
    Power Net Portal
    Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
    jharwinbarrozo
    11.4M
  • Generic Resistor
    Generic Resistor
    A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Generic Capacitor
    Generic Capacitor
    A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Generic Inductor
    Generic Inductor
    A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
    jharwinbarrozo
    15.5k
  • Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
    natarius
  • RMCF0805JT47K0
    RMCF0805JT47K0
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
    jharwinbarrozo
    1.2M
  • 875105359001
    875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
    jharwinbarrozo
    1.2M
  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
    jharwinbarrozo
    1.1M
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