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0x90

0x90

What part number should I use for C1?
1y
0x90

0x90

What would be a good part for C1?
1y
1y

copilot

Based on the provided specification and the available components within your project description, here's how you can connect your components to match the example schematic. Please find the additional components, like the inductor and diode, from a supplier like LCSC.
  • Connect PowerNet:5-24v (P1) to the positive lead of C1 and the VIN pin of PS1.
  • Place an inductor (L1) with a value of 47µH/2A. Connect PS1:OUTPUT to one end of L1. The other end of L1 will connect to the LOAD and to the positive lead of an output filtering capacitor, which is not yet in your component list.
  • Connect all the GND pins of the PS1 (pins 5, 6, 7, 8) to the circuit's ground net.
  • Connect C1:P1 to PS1:VIN and the anode of a Schottky diode (like the 1N5820). Connect C1:P2 to the ground net.
  • Place a Schottky diode (D1) with part number 1N5820. Connect D1's anode to PS1:OUTPUT and its cathode to the LOAD and the positive lead of the output filtering capacitor (COUT).
  • Place an output filtering capacitor (COUT) with at least 330uF capacitance and a voltage rating of 35V. Connect one lead of COUT to the cathode of D1 and the LOAD, and connect the other lead to the ground net.
  • The feedback (PS1:FEEDBACK), ON/OFF (PS1:ON/OFF) pins, and LOAD are application-specific, and their connections depend on further details of your project design.
Here is the revised connection list:
  • Connect PowerNet:5-24v (P1) to C1:1 and PS1:VIN.
  • Connect C1:2 to Ground.
  • Connect PS1:OUTPUT to L1:1.
  • Connect L1:2 to LOAD, COUT:1, and D1:anode.
  • Connect D1:cathode to LOAD and COUT:1.
  • Connect COUT:2 to Ground.
  • Connect PS1:GND, PS1:GND, PS1:GND, and PS1:GND to Ground.
Remember, this is a basic connection guide based on the example schematic you've provided. You will need to add an inductor and an output capacitor to complete the circuit, and you may need to add a load and control the ON/OFF pin accordingly. Depending on your specific application, you might need to adjust the feedback network for the PS1:FEEDBACK pin to set the output voltage accurately. Always check the datasheet for any additional requirements for stability or component selection.
1y
0x90

0x90

What part number would be a good match for C1?
1y

copilot

Based on the provided image and your project description, we're looking for an input capacitor (C1) with a capacitance of 470 µF and a voltage rating of 35V for the step-down (buck) converter circuit.
In the project components you have provided, there is already a capacitor designated as C1 with the following specifications:
  • MPN (Manufacturer Part Number): VT1V471M1010
  • Capacitance: 470 µF
  • Voltage Rating: Not explicitly mentioned, but assuming standard values, it's likely to be higher than 10V since it's a common minimum voltage rating for electrolytic capacitors of this size.
To ensure safety and reliability, the voltage rating of the capacitor should be higher than the maximum input voltage in your application. In your case, since the input voltage is +12V, a capacitor with a minimum voltage rating of 35V is a good choice.
Given the above, C1 with the MPN VT1V471M1010 would be a suitable match for your input capacitor if its voltage rating meets or exceeds 35V. Since the voltage rating is not provided in your description, you would need to verify this from the datasheet of the part.
Ensure that the electrostatic discharge (ESD) robustness and the equivalent series resistance (ESR) of the capacitor are appropriate for your application. The ESR can impact the performance of the step-down converter significantly. When selecting parts from a supplier like LCSC, use filters to match these requirements, and always verify these details in the datasheet.
1y
Someone is typing...
I need an SMD equivalent for a 1N5820 Schottky diode. What are my options?
0x90

0x90

@copilot I need an SMD equivalent for a 1N5820 Schottky diode. What are my options?
1y

copilot

There are several SMD equivalents for the 1N5820 Schottky diode. When suggesting these, I'll aim for similar key characteristic values, such as forward voltage drop and average rectified current.
  1. MBR1045: This is a 10A, 45V Schottky barrier diode in an SMD D2PAK package (TO-263). It has lower forward voltage (~0.5V at 5A) and can handle higher current than the 1N5820.
  2. SS34: Popularly known as the 1N5822 in an SMC package. It offers 3A current and 40V reverse voltage, a bit lower than the 1N5822 but sufficient for most purposes.
  3. MBRS340T3G: This device, in an SMC package, is a 3A Schottky Rectifier with a peak repetitive reverse voltage of 40V, making it another SMD equivalent to consider.
  4. PMBS3904,215: This device in an SOT-23 (TO-236) package is a great miniature option. The forward voltage and average rectified current are lower, but in certain low-current applications, this will work fine.
Please note, while these components are comparable in specifications, the actual performance may vary based on the exact requirements of your circuit. Always review component datasheets before making a final decision.
1y
Someone is typing...
2
GND
3V3 Fixed Out
No fucking idea what to use here
C3
Capacitance
330u F
H4
C1
Capacitance
470u F
D1
C2 needs finding. Use 35v, too, Non polarized
H1
THIS IS A POLZARIZED CAP
C2
Capacitance
105u F
L1
Inductance
Inductance
GND
Spec calls for 2A inductor, this is all I could find
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5-24v Input Buck to 3.3v

5-24v Input Buck to 3.3v
Description

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Last updated by 0x90
2 Contributor(s)
0x90
ril3y

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