Stk413-430 Circuit | Diagram

The STK413-430 generates significant heat. You must use a large aluminum heatsink and apply a thin, even layer of thermal silicone grease between the IC and the sink.

A heavy-duty diode bridge rated for at least 6A to 10A.

The STK413-430 is a popular two-channel (stereo) audio power amplifier hybrid integrated circuit (IC) developed by Sanyo. Renowned for its thick-film residential audio capabilities, this IC is widely used in high-fidelity (Hi-Fi) stereo systems, home theater receivers, and active speaker setups.

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A heavy-duty diode bridge rectifies the AC. Massive smoothing capacitors (at least

Are you looking to or are you building a new amplifier from scratch? Knowing this will help me provide specific component values for the feedback network.

Typically delivers 100W to 150W per channel into an 8-ohm load (depending on supply voltage). The STK413-430 generates significant heat

| | Symbol | Function | Pin № | Symbol | Function | | :--------- | :----------- | :------------------------------- | :--------- | :----------- | :----------------------------------- | | 1 | +IN1 (L) | Positive Input for Left Channel | 9 | IN2 (R) | Negative Input for Right Channel | | 2 | NF1 (L) | Negative Feedback for Left Channel | 10 | GND | Ground | | 3 | GND | Ground | 11 | NF2 (R) | Negative Feedback for Right Channel | | 4 | V+ | Positive Power Supply (Vcc) | 12 | OUT2 (R) | Output for Right Channel | | 5 | OUT1 (L) | Output for Left Channel | 13 | V- | Negative Power Supply (Vee) | | 6 | V- | Negative Power Supply (Vee) | 14 | BS2 (R) | Bootstrap for Right Channel | | 7 | BS1 (L) | Bootstrap for Left Channel | 15 | +IN2 (R) | Positive Input for Right Channel | | 8 | MUTE | Mute Control | 16 | NC | No Connection (Usually left unconnected) |

While exact layout maps depend on the specific Sanyo datasheet generation, the pin function distribution generally follows this structure:

A standout feature on the pinout and schematic is the dedicated Mute Pin . The circuit diagram shows a dedicated pin (often Pin 9 in STK configurations) that controls the internal bias. The STK413-430 is a popular two-channel (stereo) audio

What are the of your current power supply transformer?

When working with the STK413-430, whether for a new design or repairing an old piece of equipment, keep the following in mind:

For technicians repairing vintage receivers (such as Pioneer, Kenwood, or Sony units from the 1980s and 90s), understanding the STK413-430 circuit diagram is vital.

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