IR2104 Buck Converter Setup

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Below is a suggestion to add all the detailed schematic components and wiring to your project to implement the IR2104 low‐side driver for a buck converter. You can use the Apply changes button to update your schematic accordingly.
Schematic Changes
  1. Add IR2104:
    • Place the IR2104 with its pins: VCC, COM, LO, and IN.
    • VCC: Will be connected to the supply (e.g., 12 V).
    • COM: Connect to the common ground.
  2. Add Decoupling Capacitors at VCC:
    • C1:
      • Value: 0.1 µF (Ceramic)
      • Connect between IR2104 VCC and COM.
    • C2:
      • Value: 10 µF (Electrolytic)
      • Connect in parallel with C1 (across VCC and COM).
  3. Add Low-Side MOSFET:
    • IRFZ44N:
      • This N-channel MOSFET will act as the low-side switch.
      • Source: Connect to COM (ground).
      • Drain: Should be connected to the load/converter output as per your buck converter design.
  4. Add Gate Drive Network for the Low-Side Switch:
    • R1:
      • Value: 10 Ω
      • Place in series between the IR2104 LO (low side output) and the MOSFET gate.
    • R2:
      • Value: 10 kΩ
      • Connect between the MOSFET gate and COM (ground) as a pull-down resistor.
  5. Ensure Grounding:
    • Use the Ground component to tie together:
      • IR2104 COM
      • The source of [IRFZ44N]
      • The low-side of decoupling capacitor connections
Wiring Overview

Table

ConnectionFrom/ComponentTo/ComponentDetails
Power SupplyVCC Supply[IR2104] VCCEnsure supply is e.g., 12 V per design
Decoupling[IR2104] VCC[C1] & [C2] to COMC1 = 0.1 µF, C2 = 10 µF
Ground[IR2104] COM, [IRFZ44N] Source, Decoupling capacitors[Ground]Common ground connection
Gate Drive (series resistor)[IR2104] LO[R1] then MOSFET Gate ([IRFZ44N])[R1] = 10 Ω
Gate Pull-DownMOSFET Gate ([IRFZ44N])[R2] then [Ground][R2] = 10 kΩ to ensure MOSFET remains off by default
Summary of Schematic Additions
  • Voltage Supply & Decoupling: Add [IR2104] with decoupling capacitors ([C1] and [C2]) between its VCC and COM pins.
  • Gate Drive Network: Use a series resistor [R1] from [IR2104] LO to the gate of [IRFZ44N] and a pull-down resistor [R2] from the gate to ground.
  • Ground Connectivity: Tie all COMs and MOSFET source together using the [Ground] component.
Click Apply changes to update your project schematic with these components and connections. If you need any further adjustments or additional details, let me know!
Apply Schematic Changes
Verify MOSFET Setup
Check Decoupling Capacitors
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