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Add Class D Audio Amplifier HAT tutorial #774

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Add Class D audio amplifier HAT circuit
silasbrookshaha Jul 3, 2026
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Add Class D audio amplifier HAT tutorial
silasbrookshaha Jul 3, 2026
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187 changes: 187 additions & 0 deletions codetestingplayground/pi-hat-class-d-audio-amplifier.circuit.tsx
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import { RaspberryPiHatBoard } from "@tscircuit/common"

export default () => (
<RaspberryPiHatBoard name="HAT1">
<chip
name="U1"
footprint="soic16"
manufacturerPartNumber="PAM8403"
pinLabels={{
pin1: ["INL"],
pin2: ["INR"],
pin3: ["VREF"],
pin4: ["GND"],
pin5: ["OUTL_P"],
pin6: ["PVDD_L"],
pin7: ["OUTL_N"],
pin8: ["GND_L"],
pin9: ["OUTR_N"],
pin10: ["PVDD_R"],
pin11: ["OUTR_P"],
pin12: ["SD"],
pin13: ["MUTE"],
pin14: ["VDD"],
pin15: ["BYPASS"],
pin16: ["GND_R"],
}}
schPortArrangement={{
leftSide: {
pins: ["INL", "INR", "SD", "MUTE"],
direction: "top-to-bottom",
},
rightSide: {
pins: ["OUTL_P", "OUTL_N", "OUTR_P", "OUTR_N"],
direction: "top-to-bottom",
},
topSide: {
pins: ["VDD", "PVDD_L", "PVDD_R"],
direction: "left-to-right",
},
bottomSide: {
pins: ["GND", "GND_L", "GND_R", "VREF", "BYPASS"],
direction: "left-to-right",
},
}}
pcbX={0}
pcbY={0}
/>

<resistor name="R1" resistance="270" footprint="0402" pcbX={-20} pcbY={8} />
<resistor
name="R2"
resistance="270"
footprint="0402"
pcbX={-20}
pcbY={-8}
/>
<capacitor
name="C1"
capacitance="33nF"
footprint="0402"
pcbX={-14}
pcbY={8}
/>
<capacitor
name="C2"
capacitance="33nF"
footprint="0402"
pcbX={-14}
pcbY={-8}
/>

<potentiometer
name="RVL"
maxResistance="10k"
footprint="pinrow3"
pcbX={-8}
pcbY={10}
/>
<potentiometer
name="RVR"
maxResistance="10k"
footprint="pinrow3"
pcbX={-8}
pcbY={-10}
/>

<resistor name="R3" resistance="10k" footprint="0402" pcbX={8} pcbY={8} />
<resistor name="R4" resistance="10k" footprint="0402" pcbX={8} pcbY={-8} />
<capacitor
name="C3"
capacitance="100nF"
footprint="0402"
pcbX={12}
pcbY={4}
/>
<capacitor
name="C4"
capacitance="10uF"
footprint="0603"
pcbX={12}
pcbY={-4}
/>
<capacitor
name="C5"
capacitance="1uF"
footprint="0402"
pcbX={4}
pcbY={10}
/>

<pinheader
name="J1"
pinCount={3}
gender="male"
pitch="2.54mm"
footprint="pinrow3"
pinLabels={["PWM_L", "GND", "PWM_R"]}
showSilkscreenPinLabels
pcbX={-26}
pcbY={0}
/>
<pinheader
name="J2"
pinCount={2}
gender="female"
pitch="3.5mm"
footprint="pinrow2"
pinLabels={["L+", "L-"]}
showSilkscreenPinLabels
pcbX={22}
pcbY={8}
/>
<pinheader
name="J3"
pinCount={2}
gender="female"
pitch="3.5mm"
footprint="pinrow2"
pinLabels={["R+", "R-"]}
showSilkscreenPinLabels
pcbX={22}
pcbY={-8}
/>

<trace from=".HAT1_chip .V5_1" to="net.V5" />
<trace from=".HAT1_chip .GND_1" to="net.GND" />
<trace from=".HAT1_chip .GPIO_18" to=".R1 > .pin1" />
<trace from=".HAT1_chip .GPIO_19" to=".R2 > .pin1" />
<trace from=".J1 > .pin1" to=".R1 > .pin1" />
<trace from=".J1 > .pin2" to="net.GND" />
<trace from=".J1 > .pin3" to=".R2 > .pin1" />

<trace from=".R1 > .pin2" to=".RVL > .pin1" />
<trace from=".R2 > .pin2" to=".RVR > .pin1" />
<trace from=".C1 > .pin1" to=".RVL > .pin1" />
<trace from=".C1 > .pin2" to="net.GND" />
<trace from=".C2 > .pin1" to=".RVR > .pin1" />
<trace from=".C2 > .pin2" to="net.GND" />

<trace from=".RVL > .pin2" to=".U1 .INL" />
<trace from=".RVR > .pin2" to=".U1 .INR" />
<trace from=".RVL > .pin3" to="net.GND" />
<trace from=".RVR > .pin3" to="net.GND" />

<trace from=".R3 > .pin1" to="net.V5" />
<trace from=".R3 > .pin2" to=".U1 .SD" />
<trace from=".R4 > .pin1" to="net.V5" />
<trace from=".R4 > .pin2" to=".U1 .MUTE" />
<trace from=".U1 .VDD" to="net.V5" />
<trace from=".U1 .PVDD_L" to="net.V5" />
<trace from=".U1 .PVDD_R" to="net.V5" />
<trace from=".U1 .GND" to="net.GND" />
<trace from=".U1 .GND_L" to="net.GND" />
<trace from=".U1 .GND_R" to="net.GND" />
<trace from=".C3 > .pin1" to="net.V5" />
<trace from=".C3 > .pin2" to="net.GND" />
<trace from=".C4 > .pin1" to="net.V5" />
<trace from=".C4 > .pin2" to="net.GND" />
<trace from=".C5 > .pin1" to=".U1 .BYPASS" />
<trace from=".C5 > .pin2" to="net.GND" />

<trace from=".U1 .OUTL_P" to=".J2 > .pin1" />
<trace from=".U1 .OUTL_N" to=".J2 > .pin2" />
<trace from=".U1 .OUTR_P" to=".J3 > .pin1" />
<trace from=".U1 .OUTR_N" to=".J3 > .pin2" />
</RaspberryPiHatBoard>
)
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