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Don't skimp on filter capacitors. A pair of 4700µF or higher (rated for at least 63V) will keep your power rails stable and your bass tight.
Features thermal protection and short-circuit protection (allowable shorted time: 0.3s). stk412530 datasheet
The STK412‑530 is designed to be used with a minimum of external components, thanks to its highly integrated internal structure. A typical stereo amplifier application circuit includes: Don't skimp on filter capacitors
While it can certainly drive a subwoofer, the IC is primarily designed for full‑range stereo applications. For subwoofer duty, a more dedicated low‑frequency amplifier with a lower cutoff frequency might be preferable. Nevertheless, many DIY builders have successfully used the STK412‑530 in powered subwoofers with proper filtering. The STK412‑530 is designed to be used with
| Parameter | Value / Range | |-----------|---------------| | | Hybrid Class AB / Class H audio power amplifier IC | | Number of Channels | 2 (stereo) | | Output Power | 150 W + 150 W (maximum) ~90 W to 110 W per channel into 8 Ω (continuous) 50 W into 4 Ω at THD = 0.08%, ±36 V supply | | Total Harmonic Distortion (THD) | 0.08% (1 kHz, 30 W) | | Frequency Response | 20 Hz – 50 kHz | | Input Impedance | 56 kΩ | | Damping Factor | 60 (typical) | | Absolute Maximum Supply Voltage (no signal) | ±69 V | | Maximum Supply Voltage (with signal, R L = 8 Ω or 6 Ω) | ±62 V | | Maximum Supply Voltage (with signal, R L = 4 Ω) | ±49 V | | Recommended Operating Supply Voltage Range | ±18 V to ±36 V | | Operating IC Substrate Temperature | 125 °C (max) | | Storage Temperature | –30 °C to +125 °C | | Thermal Protection | Built‑in | | Short‑Circuit Protection | Built‑in (0.3 s allowable short time) | | Package Type | Multi‑layer SIP‑ZIP, insulated heat‑sink | | Physical Dimensions (150 W class) | 78 mm × 44 mm × 9 mm (excluding leads) | | Pin Count | 18 leads (SIP‑18 configuration) |
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