Description
Reliable 2-Channel Stereo Audio Power Amplifier
The STK4132II is a classic thick-film hybrid integrated circuit manufactured by Sanyo. Designed for split-rail power supplies, this module provides a consistent 20W + 20W stereo output. It is a popular replacement part for restoring high-quality audio in vintage compact systems and integrated amplifiers.
As a "Series II" module, it features an improved internal constant current circuit that ensures low harmonic distortion (0.4% THD) and a built-in muting circuit to eliminate audible "pops" during power cycling.
Key Technical Features:
- Continuous Power Output: 20W + 20W (at 8Ω, THD = 0.4%)
- Configuration: 2-Channel Stereo (18-Pin SIP Package)
- Frequency Bandwidth: High-end response from 20Hz to 50kHz.
- Operating Voltage: Recommended ±23V (Absolute Maximum ±34.5V).
- Integrated Protection: Features thermal protection and shock noise reduction for reliable operation.
Installation & Thermal Management:
The STK4132II requires a substantial heatsink and high-quality thermal grease for safe operation. Because this module is designed to operate at substrate temperatures up to 125°C, ensuring a flat, clean contact surface with the heatsink is critical to prevent premature thermal failure.
Technician's Note: Always check the power supply voltage and the health of the filter capacitors before installing a new IC, as overvoltage is the leading cause of failure for these hybrid modules.