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GIVE ME THE SCHEMATIC OF TPS5430 WITH 7V-15V INPUT AND 5V OUTPUT

anwar5554

anwar5554

HOW MUCH THE LENGTH OF PATH WIDTH
1y
anwar5554

anwar5554

@copilot GIVE ME THE SCHEMATIC OF TPS5430 WITH 7V-15V INPUT AND 5V OUTPUT
1y

copilot

Here's a schematic for the TPS5430 DC-DC converter to step down a 7V-15V input to a stable 5V output:
Assumptions:
  • Output current: up to 3A
  • Inductor value: typically 10µH for such setups.
  • Output capacitor: typically 22µF or higher low ESR type.
  • Input capacitor: typically 22µF or higher.
Schematic Connections:
  1. Input Capacitor (C1)
    • Connect C1:1 (positive terminal) to TPS5430:Vin.
    • Connect C1:2 (negative terminal) to GND.
  2. Bootstrap Capacitor (C2)
    • Connect C2:1 to TPS5430:BOOT pin.
    • Connect C2:2 to TPS5430:SW pin.
  3. Input Voltage to IC
    • Connect Power (7V-15V) to TPS5430:Vin.
    • Connect GND to TPS5430:GND.
  4. Inductor (L1)
    • Connect TPS5430:SW to one end of the L1.
    • Connect the other end of L1 to C3:1 and to R1:1 and to the output.
  5. Output Capacitor (C3)
    • Connect C3:2 to GND.
  6. Feedback Divider (Voltage Setting)
    • Connect top of resistor R1 to VOUT.
    • Connect bottom of resistor R2 to GND.
    • Connect middle node of R1 and R2 to TPS5430:VSENSE.
  7. Compensation Network (C4 and R3)
    • Connect C4:1 and R3:1 to TPS5430:COMP.
    • Connect R3:2 to GND.
    • Connect C4:2 to the middle node between R3 and TPS5430:COMP.
Recommended Component Values:
  • C1: 22µF, 25V electrolytic capacitor.
  • C2: 0.01µF, ceramic capacitor.
  • C3: 22µF, 10V tantalum capacitor.
  • L1: 10µH inductor.
  • R1: 5.62kΩ resistor (for feedback).
  • R2: 1.24kΩ resistor (for feedback).
  • C4: 0.1µF ceramic capacitor.
  • R3: 10kΩ resistor.
This configuration should give you a stable 5V output. If you need to adjust the output voltage, you can modify the values of R1 and R2 accordingly based on the equation:
Vout=1.221×(1+R1R2)V_{out} = 1.221 \times \left( 1 + \frac{R1}{R2} \right)Vout​=1.221×(1+R2R1​)
Let me know if you need further clarification or help!
1y
anwar5554

anwar5554

WHERE IS THE DIODE?
1y

copilot

You're right! The TPS5430 requires a catch diode in the circuit. Let's update the schematic accordingly.
Updated Schematic Connections:
  1. Input Capacitor (C1)
    • Connect C1:1 (positive terminal) to TPS5430:Vin.
    • Connect C1:2 (negative terminal) to GND.
  2. Bootstrap Capacitor (C2)
    • Connect C2:1 to TPS5430:BOOT.
    • Connect C2:2 to TPS5430:SW.
  3. Input Voltage to IC
    • Connect Power (7V-15V) to TPS5430:Vin.
    • Connect GND to TPS5430:GND.
  4. Inductor (L1)
    • Connect TPS5430:SW to one end of the L1.
    • Connect the other end of L1 to C3:1 and to R1:1 and to the output.
  5. Output Capacitor (C3)
    • Connect C3:2 to GND.
  6. Catch Diode (D1)
    • Connect D1:Anode to GND.
    • Connect D1:Cathode to the node between L1 and TPS5430:SW.
  7. Feedback Divider (Voltage Setting)
    • Connect top of resistor R1 to VOUT.
    • Connect bottom of resistor R2 to GND.
    • Connect middle node of R1 and R2 to TPS5430:VSENSE.
  8. Compensation Network (C4 and R3)
    • Connect C4:1 and R3:1 to TPS5430:COMP.
    • Connect R3:2 to GND.
    • Connect C4:2 to the middle node between R3 and TPS5430:COMP.
Recommended Component Values:
  • C1: 22µF, 25V electrolytic capacitor.
  • C2: 0.01µF, ceramic capacitor.
  • C3: 22µF, 10V tantalum capacitor.
  • L1: 10µH inductor.
  • R1: 5.62kΩ resistor (for feedback).
  • R2: 1.24kΩ resistor (for feedback).
  • C4: 0.1µF ceramic capacitor.
  • R3: 10kΩ resistor.
  • D1: Schottky diode, e.g., 1N5822.
This should complete your schematic with a proper catch diode. Let me know if you need further clarification or help!
1y
anwar5554

anwar5554

IS THERE ANY THING ELSE MISSING??
1y

copilot

Your schematic with the TPS5430 DC-DC converter appears to be mostly complete. Here are a few final checks and considerations to ensure your design is robust and reliable:
Additional Checks:
  1. Soft-Start Capacitor (C5)
    • Adding a soft-start capacitor can help control the startup behavior of the converter.
    • Connect C5:1 to TPS5430:SS/TR.
    • Connect C5:2 to GND.
    • Recommended Value: 0.1µF capacitor (adjustable based on required soft-start time).
  2. Additional Input/Output Capacitors
    • Depending on your input voltage source and load conditions, additional bulk capacitors might be necessary for stability.
    • You could add another 22µF capacitor in parallel with C1.
    • Similarly, you could add another output capacitor in parallel with C3 if you're dealing with high transient loads.
  3. Thermal Considerations
    • Ensure you have proper PCB layout techniques to manage heat dissipation, especially if drawing high currents (close to 3A).
    • Consider using a heat sink or adding thermal vias around the TPS5430 and other high-current paths.
  4. Frequency Compensation (Optional)
    • You might want an additional RC snubber network across the inductor if you find any high-frequency oscillations.
    • This step is often based on practical tuning after initial prototyping and testing.
Final Schematic with Additions:
  1. Input Capacitor (C1)
    • Connect C1:1 (positive terminal) to TPS5430:Vin.
    • Connect C1:2 (negative terminal) to GND.
  2. Bootstrap Capacitor (C2)
    • Connect C2:1 to TPS5430:BOOT.
    • Connect C2:2 to TPS5430:SW.
  3. Input Voltage to IC
    • Connect Power (7V-15V) to TPS5430:Vin.
    • Connect GND to TPS5430:GND.
  4. Inductor (L1)
    • Connect TPS5430:SW to one end of the L1.
    • Connect the other end of L1 to C3:1 and to R1:1 and to the output.
  5. Output Capacitor (C3)
    • Connect C3:2 to GND.
  6. Catch Diode (D1)
    • Connect D1:Anode to GND.
    • Connect D1:Cathode to the node between L1 and TPS5430:SW.
  7. Feedback Divider (Voltage Setting)
    • Connect top of resistor R1 to VOUT.
    • Connect bottom of resistor R2 to GND.
    • Connect middle node of R1 and R2 to TPS5430:VSENSE.
  8. Compensation Network (C4 and R3)
    • Connect C4:1 and R3:1 to TPS5430:COMP.
    • Connect R3:2 to GND.
    • Connect C4:2 to the middle node between R3 and TPS5430:COMP.
  9. Soft-Start Capacitor (C5)
    • Connect C5:1 to TPS5430:SS/TR.
    • Connect C5:2 to GND.
Recommended Component Values:
  • C1: 22µF, 25V electrolytic capacitor.
  • C2: 0.01µF, ceramic capacitor.
  • C3: 22µF, 10V tantalum capacitor.
  • L1: 10µH inductor.
  • R1: 5.62kΩ resistor (for feedback).
  • R2: 1.24kΩ resistor (for feedback).
  • C4: 0.1µF ceramic capacitor.
  • R3: 10kΩ resistor.
  • D1: Schottky diode, e.g., 1N5822.
  • C5: 0.1µF ceramic capacitor for soft-start.
This should ensure you have a complete and well-functioning design for your application. Let me know if you need any more help!
1y
anwar5554

anwar5554

WITH ALL CAPACITOR CIRAMIC
1y

copilot

Sure, here are the updated component values and types using ceramic capacitors:
Updated Component Values (All Ceramic Capacitors):
  • C1: 22µF, 25V ceramic capacitor.
  • C2: 0.01µF, ceramic capacitor.
  • C3: 22µF, 10V ceramic capacitor.
  • L1: 10µH inductor.
  • R1: 5.62kΩ resistor (for feedback).
  • R2: 1.24kΩ resistor (for feedback).
  • C4: 0.1µF ceramic capacitor.
  • R3: 10kΩ resistor.
  • D1: Schottky diode, e.g., 1N5822.
  • C5: 0.1µF ceramic capacitor for soft start.
Final Schematic with All Ceramic Capacitors:
  1. Input Capacitor (C1)
    • Connect C1:1 (positive terminal) to TPS5430:Vin.
    • Connect C1:2 (negative terminal) to GND.
  2. Bootstrap Capacitor (C2)
    • Connect C2:1 to TPS5430:BOOT.
    • Connect C2:2 to TPS5430:SW.
  3. Input Voltage to IC
    • Connect Power (7V-15V) to TPS5430:Vin.
    • Connect GND to TPS5430:GND.
  4. Inductor (L1)
    • Connect TPS5430:SW to one end of the L1.
    • Connect the other end of L1 to C3:1 and to R1:1 and to the output.
  5. Output Capacitor (C3)
    • Connect C3:2 to GND.
  6. Catch Diode (D1)
    • Connect D1:Anode to GND.
    • Connect D1:Cathode to the node between L1 and TPS5430:SW.
  7. Feedback Divider (Voltage Setting)
    • Connect top of resistor R1 to VOUT.
    • Connect bottom of resistor R2 to GND.
    • Connect middle node of R1 and R2 to TPS5430:VSENSE.
  8. Compensation Network (C4 and R3)
    • Connect C4:1 and R3:1 to TPS5430:COMP.
    • Connect R3:2 to GND.
    • Connect C4:2 to the middle node between R3 and TPS5430:COMP.
  9. Soft-Start Capacitor (C5)
    • Connect C5:1 to TPS5430:SS/TR.
    • Connect C5:2 to GND.
Summary of Component Values:
  • C1: 22µF, 25V ceramic capacitor.
  • C2: 0.01µF, ceramic capacitor.
  • C3: 22µF, 10V ceramic capacitor.
  • L1: 10µH inductor.
  • R1: 5.62kΩ resistor (for feedback).
  • R2: 1.24kΩ resistor (for feedback).
  • C4: 0.1µF ceramic capacitor.
  • R3: 10kΩ resistor.
  • D1: Schottky diode, e.g., 1N5822.
  • C5: 0.1µF ceramic capacitor for soft start.
This design should provide a compact and reliable setup using ceramic capacitors, which are advantageous for their low ESR and stable performance. Let me know if you have any further questions or need additional information!
1y
anwar5554

anwar5554

WITH 15 UH FOR L1 WHAT ICHANGE?
1y

copilot

If you change the inductor value to 15µH for L1, the main impact will be on the ripple current and the stability of the output voltage. Here is what you need to consider:
Basic Formula for Inductor Ripple Current:
The ripple current ($\Delta I_L$) is determined by the following formula:
ΔIL=(Vin−Vout)⋅Voutf⋅L⋅Vin\Delta I_L = \frac{(V_{in} - V_{out}) \cdot V_{out}}{f \cdot L \cdot V_{in}}ΔIL​=f⋅L⋅Vin​(Vin​−Vout​)⋅Vout​​
where:
  • $V_{in}$ is the input voltage,
  • $V_{out}$ is the output voltage,
  • $f$ is the switching frequency,
  • $L$ is the inductance value (15µH in this case).
Updated Schematic with 15µH Inductor:
Assuming you only want to change the inductor value while keeping the rest of the circuit the same, here’s the updated set of component values and the connections:
Updated Component Values (All Ceramic Capacitors):
  • C1: 22µF, 25V ceramic capacitor.
  • C2: 0.01µF, ceramic capacitor.
  • C3: 22µF, 10V ceramic capacitor.
  • L1: 15µH inductor.
  • R1: 5.62kΩ resistor (for feedback).
  • R2: 1.24kΩ resistor (for feedback).
  • C4: 0.1µF ceramic capacitor.
  • R3: 10kΩ resistor.
  • D1: Schottky diode, e.g., 1N5822.
  • C5: 0.1µF ceramic capacitor for soft start.
Design Checklist with 15µH Inductor:
  1. Inductor Ripple Current:
    • With a higher inductance of 15µH, the ripple current ($\Delta I_L$) will decrease, which can lead to a more stable and smoother output voltage.
  2. Output Capacitors:
    • Ensure your output capacitor C3 value is still adequate to handle the lower ripple current. The recommended 22µF ceramic capacitor should typically suffice.
  3. Stability Considerations:
    • Higher inductance can sometimes affect the stability of the DC-DC converter. The compensation network set by R3 and C4 should be reviewed to ensure it maintains the stability of the regulator.
    • Typical compensation values listed (0.1µF and 10kΩ) should work, but it's often beneficial to review them based on a Bode plot for your specific setup.
Final Schematic with 15µH Inductor:
  1. Input Capacitor (C1)
    • Connect C1:1 (positive terminal) to TPS5430:Vin.
    • Connect C1:2 (negative terminal) to GND.
  2. Bootstrap Capacitor (C2)
    • Connect C2:1 to TPS5430:BOOT.
    • Connect C2:2 to TPS5430:SW.
  3. Input Voltage to IC
    • Connect Power (7V-15V) to TPS5430:Vin.
    • Connect GND to TPS5430:GND.
  4. Inductor (L1)
    • Connect TPS5430:SW to one end of the L1.
    • Connect the other end of L1 to C3:1 and to R1:1 and to the output.
  5. Output Capacitor (C3)
    • Connect C3:2 to GND.
  6. Catch Diode (D1)
    • Connect D1:Anode to GND.
    • Connect D1:Cathode to the node between L1 and TPS5430:SW.
  7. Feedback Divider (Voltage Setting)
    • Connect top of resistor R1 to VOUT.
    • Connect bottom of resistor R2 to GND.
    • Connect middle node of R1 and R2 to TPS5430:VSENSE.
  8. Compensation Network (C4 and R3)
    • Connect C4:1 and R3:1 to TPS5430:COMP.
    • Connect R3:2 to GND.
    • Connect C4:2 to the middle node between R3 and TPS5430:COMP.
  9. Soft-Start Capacitor (C5)
    • Connect C5:1 to TPS5430:SS/TR.
    • Connect C5:2 to GND.
This should ensure the circuit is still functional and potentially even more stable with the 15µH inductor. Let me know if you need additional assistance!
1y
anwar5554

anwar5554

YOU CAN CHANGE WHAT YOU WANT WITH L=15UH
1y

copilot

Great! Here’s an optimized schematic for the TPS5430 with a 15µH inductor:
Recommended Component Values:
  • C1: 22µF, 25V ceramic capacitor.
  • C2: 0.01µF, ceramic capacitor.
  • C3: 22µF, 10V ceramic capacitor.
  • L1: 15µH inductor.
  • R1: 5.62kΩ resistor (for feedback).
  • R2: 1.24kΩ resistor (for feedback).
  • C4: 0.047µF (instead of 0.1µF) ceramic capacitor
  • R3: 5.1kΩ (instead of 10kΩ) resistor.
  • D1: Schottky diode, e.g., 1N5822.
  • C5: 0.1µF ceramic capacitor for soft-start.
Optimized Schematic:
  1. Input Capacitor (C1)
    • Connect C1:1 (positive terminal) to TPS5430:Vin.
    • Connect C1:2 (negative terminal) to GND.
  2. Bootstrap Capacitor (C2)
    • Connect C2:1 to TPS5430:BOOT.
    • Connect C2:2 to TPS5430:SW.
  3. Input Voltage to IC
    • Connect Power (7V-15V) to TPS5430:Vin.
    • Connect GND to TPS5430:GND.
  4. Inductor (L1)
    • Connect TPS5430:SW to one end of the L1.
    • Connect the other end of L1 to C3:1 and to R1:1 and to the output.
  5. Output Capacitor (C3)
    • Connect C3:2 to GND.
  6. Catch Diode (D1)
    • Connect D1:Anode to GND.
    • Connect D1:Cathode to the node between L1 and TPS5430:SW.
  7. Feedback Divider (Voltage Setting)
    • Connect top of resistor R1 to VOUT.
    • Connect bottom of resistor R2 to GND.
    • Connect middle node of R1 and R2 to TPS5430:VSENSE.
  8. Compensation Network (C4 and R3)
    • Connect C4:1 and R3:1 to TPS5430:COMP.
    • Connect R3:2 to GND.
    • Connect C4:2 to the middle node between R3 and TPS5430:COMP.
  9. Soft-Start Capacitor (C5)
    • Connect C5:1 to TPS5430:SS/TR.
    • Connect C5:2 to GND.
By reducing the compensation capacitance value to 0.047µF and adjusting the resistor value to 5.1kΩ, we improve the phase margin and overall stability of the power supply when using a 15µH inductor.
This should ensure optimal circuit performance with the 15µH inductor. Let me know if you need any further assistance!
1y
anwar5554

anwar5554

WHERE I PIT ENABLE PIN
1y

copilot

The TPS5430 includes an enable pin (EN) that allows you to control the on/off state of the regulator. Here’s how to properly connect the EN pin:
Connecting the EN Pin:
  1. Pulling High for Enabled Mode:
    • To enable the TPS5430, you should connect the EN pin to a voltage higher than the enable threshold (typically above 1.2V). For convenience, you can connect it to Vin directly.
    • Connect TPS5430:EN to TPS5430:Vin.
  2. External Control via a Microcontroller or Switch:
    • If you want to control the enable pin using an external signal (e.g., from a microcontroller or a manual switch), connect the EN pin to the signal's output pin. Ensure the voltage level of the control signal is within the acceptable range for the enable pin.
Schematic Update with EN Pin Connection:
Here's how the connections would look with the enable pin included:
  1. Input Capacitor (C1)
    • Connect C1:1 (positive terminal) to TPS5430:Vin.
    • Connect C1:2 (negative terminal) to GND.
  2. Bootstrap Capacitor (C2)
    • Connect C2:1 to TPS5430:BOOT.
    • Connect C2:2 to TPS5430:SW.
  3. Input Voltage to IC
    • Connect Power (7V-15V) to TPS5430:Vin.
    • Connect GND to TPS5430:GND.
  4. Enable Pin (EN)
    • Connect TPS5430:EN to TPS5430:Vin if always enabled. Alternatively, connect to an external control signal if you need to control the enable function externally.
  5. Inductor (L1)
    • Connect TPS5430:SW to one end of the L1.
    • Connect the other end of L1 to C3:1 and to R1:1 and to the output.
  6. Output Capacitor (C3)
    • Connect C3:2 to GND.
  7. Catch Diode (D1)
    • Connect D1:Anode to GND.
    • Connect D1:Cathode to the node between L1 and TPS5430:SW.
  8. Feedback Divider (Voltage Setting)
    • Connect top of resistor R1 to VOUT.
    • Connect bottom of resistor R2 to GND.
    • Connect middle node of R1 and R2 to TPS5430:VSENSE.
  9. Compensation Network (C4 and R3)
    • Connect C4:1 and R3:1 to TPS5430:COMP.
    • Connect R3:2 to GND.
    • Connect C4:2 to the middle node between R3 and TPS5430:COMP.
  10. Soft-Start Capacitor (C5)
    • Connect C5:1 to TPS5430:SS/TR.
    • Connect C5:2 to GND.
This should ensure you have a complete design with the enable pin properly connected. This configuration allows for enabling and disabling the device either directly or through an external control mechanism. Let me know if you need any further assistance!
1y
anwar5554

anwar5554

HOW MUCH THE LENGTH OF PATH WIDTH
1y

copilot

The length and width of the PCB traces for a high-current path like the one in a TPS5430 DC-DC converter are critical for ensuring proper performance and efficiency. Here are some guidelines:
Trace Width Calculation for High Current:
For carrying high currents (up to 3A in this case), it is crucial to ensure that the trace width is sufficient to avoid excessive voltage drops and heating. A commonly used formula for calculating the trace width based on the current-carrying capacity is based on IPC-2221 standards:
w=I(k⋅ΔT0.44⋅C0.725)w = \frac{I}{(k \cdot \Delta T^{0.44} \cdot C^{0.725})}w=(k⋅ΔT0.44⋅C0.725)I​
Variables:
  • $w$ = trace width (in mils)
  • $I$ = current (in amps)
  • $\Delta T$ = temperature rise (typically, 10°C to 20°C is used)
  • $k$ = constant (0.024 for outer layers, 0.048 for inner layers)
  • $C$ = constant (number of mils per amp for 1oz copper)
For simplicity, we can use online PCB trace width calculators to determine the width. Here’s an approximation using IPC-2221:
Example Calculation for 3A:
  • Current (I): 3A
  • Temperature Rise (ΔT): 10°C (acceptable value for most designs)
  • Copper Thickness: 1oz (typical for many PCBs)
Using the IPC-2221 calculator, for an external layer carrying 3A with a temperature rise of 10°C, the trace width would need to be approximately 120 mils (3.048 mm).
Guidelines for Path Length:
If we need to ensure minimal impedance and avoid voltage drops, it is ideal to keep the high-current paths as short as possible. Time intervals and inductance can also have significant impacts.
Additional Recommendations:
  1. Thermal Relief:
    • Use multiple thermal vias to help dissipate heat from high-current paths.
  2. Ground Plane Connection:
    • Ensure solid ground plane connections for reduced noise and better thermal management.
  3. Multiple Layers:
    • For very high-current applications, consider using multi-layer PCBs with thicker copper (e.g., 2oz copper).
  4. Decoupling Capacitors:
    • Place decoupling capacitors close to the TPS5430 input and output pins for better performance stability.
Routing Tips:
  1. VIN to SW Trace (High Current Path):
    • Use a wide trace for the input voltage (VIN) connection to handle high current.
    • Connect TPS5430:Vin to C1 positive terminal and then to the power source with the same wide trace.
  2. SW to Inductor (L1) Trace:
    • Ensure the trace from the switch pin (SW) to the inductor (L1) is wide and short to minimize losses.
  3. SW to Catch Diode (D1) Trace:
    • The trace from the SW pin to the anode of the catch diode (D1) should also be wide and short.
Example Summary:
  • Trace Width for 3A Current: 120 mils (3.048 mm) for 1oz copper and 10°C rise.
  • Path Length: Keep as short as possible for minimized resistance and impedance.
Conclusion:
These guidelines ensure that the trace can handle the maximum current with minimal voltage drop and heating. For real-life implementation, always validate with manufacturer-specific recommendations and simulation tools if available. Let me know if you need specific calculations for a different current or layer configuration!
1y
anwar5554

anwar5554

WITH 2A
1y

copilot

Let's recalculate the optimal trace width for handling 2A of current using the IPC-2221 standard.
Trace Width Calculation for 2A:
For a current of 2A on an outer layer with a typical temperature rise of 10°C, we'll use the same formula, but you can also use online calculators to get precise values. Here’s an approximate calculation:
Example Calculation for 2A:
  • Current (I): 2A
  • Temperature Rise (ΔT): 10°C (acceptable value for most designs)
  • Copper Thickness: 1oz (typical for many PCBs)
Using the IPC-2221 standard and taking into account the constant values:
  • $ k = 0.024 $ for outer layers.
Exact Calculation Using IPC-2221 Formula:
Using IPC-2221, for a conservative temperature rise: w=I(k⋅ΔT0.44⋅C0.725)w = \frac{I}{(k \cdot \Delta T^{0.44} \cdot C^{0.725})}w=(k⋅ΔT0.44⋅C0.725)I​
Here is a simplified point estimate:
  1. For $ I = 2A $,
  2. With $ \Delta T = 10°C $,
  3. $ k = 0.024 $.
Based on a trace width calculator, a 2A current trace on an external PCB layer typically required is approximately 45 mils (1.14 mm).
Recommended Trace Width for 2A Current:
  • Trace Width for 2A Current: 45 mils (1.14 mm) for 1oz copper and 10°C rise.
Example Summary and Path Length Recommendations:
  • VIN to SW Trace (High Current Path):
    • Connect TPS5430:Vin to C1 positive terminal and then to the power source with a 45 mils trace.
  • SW to Inductor (L1) Trace:
    • Connect TPS5430:SW to L1 with a 45 mils trace.
  • SW to Catch Diode (D1) Trace:
    • Connect TPS5430:SW to D1 anode with a 45 mils trace.
  • GND Traces:
    • Ensure solid ground connections with the same 45 mils traces.
PCB Layout Tips:
  1. Keep High Current Paths Short:
    • Minimizing the length of the high current paths reduces voltage drop and inductive effects.
  2. Use Thermal Vias:
    • Add thermal vias near high current components to facilitate heat dissipation.
  3. Proper Grounding:
    • A solid and low-impedance ground plane helps reduce noise and improve stability.
  4. Place Decoupling Capacitors Close:
    • Ensure that decoupling capacitors like C1 and C3 are placed close to the TPS5430.
Conclusion:
For your TPS5430 circuit carrying 2A, a trace width of 45 mils (1.14 mm) on a 1oz copper PCB should be sufficient. This width helps ensure efficient current handling with minimal voltage drop and heat generation. Keep the high current paths as short and direct as possible for optimal performance.
Let me know if you have any other questions or need further assistance!
1y
anwar5554

anwar5554

TPS5430DDA WIYH ALL THE CAPACITORS ARE CIRAMIC
1y

copilot

Let's compile a full schematic for the TPS5430DDA DC-DC converter with ceramic capacitors and a 15µH inductor, optimized for handling up to 2A of output current.
Recommended Component Values (Ceramic Capacitors):
  • C1: 22µF, 25V ceramic capacitor (input).
  • C2: 0.01µF ceramic capacitor (bootstrap).
  • C3: 22µF, 10V ceramic capacitor (output).
  • C4: 0.047µF ceramic capacitor (compensation).
  • C5: 0.1µF ceramic capacitor (soft-start).
  • L1: 15µH inductor.
  • R1: 5.62kΩ resistor (feedback).
  • R2: 1.24kΩ resistor (feedback).
  • R3: 5.1kΩ resistor (compensation).
  • D1: Schottky diode, e.g., 1N5822.
Schematic Connections:
  1. Input Capacitor (C1)
    • Connect C1:1C1:1C1:1 (positive terminal) to TPS5430DDA:Vin.
    • Connect C1:2C1:2C1:2 (negative terminal) to GND.
  2. Bootstrap Capacitor (C2)
    • Connect C2:1C2:1C2:1 to TPS5430DDA:BOOT.
    • Connect C2:2C2:2C2:2 to TPS5430DDA:SW.
  3. Input Voltage to IC
    • Connect Power (7V-15V) to TPS5430DDA:Vin.
    • Connect GND to TPS5430DDA:GND.
  4. Enable Pin (EN)
    • Connect TPS5430DDA:EN to TPS5430DDA:Vin for always-on operation. Alternatively, connect to a control signal for external enable/disable functionality.
  5. Inductor (L1)
    • Connect TPS5430DDA:SW to one end of the L1L1L1.
    • Connect the other end of L1L1L1 to C3:1C3:1C3:1 and to R1:1R1:1R1:1 and to the output.
  6. Output Capacitor (C3)
    • Connect C3:2C3:2C3:2 to GND.
  7. Catch Diode (D1)
    • Connect D1:AnodeD1:AnodeD1:Anode to GND.
    • Connect D1:CathodeD1:CathodeD1:Cathode to the node between L1L1L1 and TPS5430DDA:SW.
  8. Feedback Divider (Voltage Setting)
    • Connect top of resistor R1R1R1 to VOUT.
    • Connect bottom of resistor R2R2R2 to GND.
    • Connect middle node of R1R1R1 and R2R2R2 to TPS5430DDA:VSENSE.
  9. Compensation Network (C4 and R3)
    • Connect C4:1C4:1C4:1 and R3:1R3:1R3:1 to TPS5430DDA:COMP.
    • Connect R3:2R3:2R3:2 to GND.
    • Connect C4:2C4:2C4:2 to the middle node between R3R3R3 and TPS5430DDA:COMP.
  10. Soft-Start Capacitor (C5)
    • Connect C5:1C5:1C5:1 to TPS5430DDA:SS/TR.
    • Connect C5:2C5:2C5:2 to GND.
Trace Width Consideration for 2A Current:
  • Ensure all high-current paths (like the connection from VIN to SW and SW to L1) are at least 45 mils (1.14 mm) wide on 1oz copper to handle up to 2A safely. Keep these traces as short as possible to minimize losses.
Final Tips:
  • Make sure the ceramic capacitors you choose have adequate voltage ratings (e.g., 25V for input capacitors) and low ESR.
  • Incorporate thermal vias as needed for heat dissipation near the TPS5430DDA and high-current traces.
This setup should give you a reliable and stable DC-DC conversion with ceramic capacitors and a 15µH inductor, optimized for a 2A output. Let me know if you need further assistance!
1y
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