Stk413-430 Circuit Diagram May 2026

Connected from output to ground, this network presents a stable load at high frequencies, preventing oscillation when driving reactive speaker loads.

| Pin | Function | Pin | Function | | :--- | :--- | :--- | :--- | | 1 | NF Left (-In) | 18 | NF Right (-In) | | 2 | Left Signal In | 17 | Right Signal In | | 3 | Bias / Bootstrap L | 16 | Bias / Bootstrap R | | 4 | Left Output | 15 | Right Output | | 5 | +Vcc (Left stage) | 14 | +Vcc (Right stage) | | 6 | +Vcc (Power) | 13 | +Vcc (Power) | | 7 | -Vee (Power) | 12 | -Vee (Power) | | 8 | -Vee (Left stage) | 11 | -Vee (Right stage) | | 9 | Signal Ground | 10 | Heatsink / Substrate Ground |

Warning: On some modules, pin 10 is internally connected to the metal backplate. If you use a conductive thermal pad, ensure your heatsink is not shorting to chassis ground unless intended. stk413-430 circuit diagram

Note: Since I can’t embed an image here, I’ll describe the topology so you can cross-reference with the datasheet.

Signal Path:

Feedback Network:

Power Supply:

| Component | Value | Purpose | | :--- | :--- | :--- | | C1 (Input) | 2.2µF/50V | DC blocking | | C2 (Bootstrap) | 100µF/50V | Boosts output swing | | C3, C4 (Supply) | 1000µF/50V | Power supply filtering | | R1, R2 (Gain set) | 1kΩ, 56kΩ | Sets closed-loop gain | | Zobel network | 10Ω + 0.1µF | Prevents high-frequency oscillation |