EnglishChannels 1 and 2 non-inverting input pins; feed incoming signals here after passing through DC blocking components.
High-current audio driving nodes routed directly to speakers through the protection circuit.
, utilizing a split (dual) power supply for optimal audio performance. Guaranteed operation up to
), the internal transistors are shorted, and the IC must be replaced.
+-----------+ | STK413-430 | +-----------+ | Pin 1: Vcc | | Pin 2: R1 | | Pin 3: IN1 | | Pin 4: R2 | | Pin 5: IN2 | | Pin 6: R3 | | Pin 7: R4 | | Pin 9: OUT1 | | Pin 10: FB1 | | Pin 11: OUT2 | | Pin 12: FB2 | +-----------+ | | v +-----------+ | Speaker | +-----------+
An onboard signal envelope detector continuously reads the incoming audio waveform.
Features the same pin assignment as the STK4101II series, making it easily interchangeable for repairs or upgrades. Circuit Diagram Breakdown
AC transformer (minimum 3-4 Amps) is suitable, leading to a DC voltage of approximately ±35Vplus or minus 35 cap V Large filter capacitors (
: Directly swapping in a higher-power module is not a simple upgrade. A user reported that replacing an STK413-430 with an STK413-530 resulted in no audio, likely due to a different internal configuration. Always verify compatibility of the pinout, biasing, and power supply before attempting such an upgrade.
When designing a circuit with the STK413-430, consider the following:
Typically designed for a power output in the range of (depending on supply voltage and load impedance). Structure: Class AB hybrid amplifier.
film capacitor must be wired from the audio output terminal directly to power ground. This creates a resistive load profile at high frequencies, dampening ringing and keeping the IC dynamically stable. Comprehensive Implementation Pinout Strategy
Zobel_L(“Zobel Network<br>(R+C)<br>to GND”) --- PIN_5 Zobel_R(“Zobel Network<br>(R+C)<br>to GND”) --- PIN_12
Built-in mute circuitry designed to cleanly cut off power-on and power-off pops. The STK413-430 Reference Circuit Diagram
Typically 20W + 20W (with variations up to higher peak outputs depending on load). Operating Voltage: Maximum supply voltage of plus or minus 34.5 cap V Total Harmonic Distortion (THD): depending on the specific application. Pin Compatibility: