Power net portal is a special schematic object used to define a power or ground net. Power ports allow you to conveniently indicate a power net at any location in the design. Power nets of the same designator automatically connect throughout your design #portal #power
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
Sure! Let’s break down what this project is about and what its components are for.
Project Overview
This project is named BQ2550 Sub-l and focuses on energy harvesting using the Texas Instruments BQ25504 integrated circuit (IC). Energy harvesting circuits like this one typically gather small amounts of power from environmental sources such as solar panels, vibration, or thermal differences.
The BQ25504 is a highly efficient IC designed to manage these energy sources, store the harvested energy into a battery or capacitor, and provide power to a low-powered electronic system.
Project Components and Connections
Here’s a brief rundown of the main components and their functionalities, as well as any notable connections:
Primary IC: BQ25504 (Designator: IC1)
Pins and Functions:
VSS (1, 13): Ground pins
VIN_DC (2): Input voltage from a DC power source
VOC_SAMP (3): Sampled open-circuit voltage from an energy-harvesting source
VREF_SAMP (4): Reference voltage for internal operations
VBAT_OK (11): Indicates if the battery voltage is within acceptable range
AVSS (12): Analog ground
VBAT (14): Battery connection
VSTOR (15): Energy storage output
LBST (16): Boost inductor connection
PAD (17): Thermal pad should be connected to ground
Resistors
Various resistors (R1, R2, R3, etc.) with specified resistance values are used for setting different voltage thresholds and providing feedback.
Examples:
R5: 5.90MΩ, forming part of the resistor divider network.
R4: 4.42MΩ, likely involved in voltage sensing.
Capacitors
Capacitors (C1, C2, C3, C4) serve to filter and stabilize voltages, smoothing out the power supply to avoid noise and fluctuations.
Examples:
C1 and C3: 4.7µF, probably used for decoupling and energy storage.
C4: 0.01µF, possibly used for finer filtering tasks.
Inductor
L1: 22µH, used as a part of the boost converter circuit to step up the voltage as required for the storage element or load.
Nets
VBAT_OV, VBAT_UV, VBAT_OK, VIN_DC, OK_PROG, OK_HYST: These nets represent various nodes in the circuit, connecting resistors, capacitors, and other elements to the relevant pins on the IC.
Assumptions and Additional Remarks
The circuit seems to be designed for energy harvesting using a solar panel, as inferred from the designator SOLAR+ and VIN_DC connections.
The resistors and capacitors associated with VBAT_OV, VBAT_UV, and VBAT_OK indicate settings for over and under voltage protection of the battery.
Next Steps
If you have any specific questions or need help with particular aspects of this design, feel free to ask! Whether it's connections, component values, or understanding specific net behaviors, I'm here to help.
tteague
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