Datasheet: Stk412530
The is a high-performance, two-channel (stereo) thick-film hybrid integrated circuit (IC) designed for Class H audio power amplification. It is characterized by its high-efficiency "shift power supply" system, which adjusts the operating voltage based on the audio signal level to minimize heat and maximize power. Key Specifications
When designing with the STK412-530, several factors should be considered:
: The moment a transient peak or loud musical passage demands more headroom, the internal controller switches to the higher voltage rail ( stk412530 datasheet
The STK412-530 is considered obsolete and is not in current production by ON Semiconductor. However, it remains available from various sources for repair and restoration projects:
The STK412-530 is categorized as a "Two-Channel Shift Power Supply Audio Power Amplifier IC," a sophisticated device capable of driving two independent audio channels with substantial power output. It is designed using thick-film hybrid technology, where multiple active and passive components are embedded onto a single ceramic substrate, ensuring high reliability and excellent thermal stability. However, it remains available from various sources for
| 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) |
The STK412-530 is a capable, high-fidelity audio amplifier module that simplifies stereo amplifier design. While it is no longer in production, its datasheet remains a valuable reference for repairing vintage audio gear or understanding hybrid IC amplifier design. When using this component, proper heatsinking, power supply decoupling, and grounding are essential to achieve its rated performance and reliability. While it is no longer in production, its
The module delivers a substantial 150W + 150W of continuous output power per channel, suitable for high-power stereo systems.
Complete Guide to the STK412-530 Datasheet: High-Power Class-H Audio Amplifier
STK412-530 is a two-channel, class H audio power amplifier hybrid IC manufactured by
Positive and negative input for Channel 1 and Channel 2. Feedback Pins: To control gain and minimize distortion. Power Supply Pins: Dual voltage inputs ( ) to feed the shift power supply. Ground: Signal and Power Ground. Output Pins: Speaker outputs for both channels.