The STK412-530 is a two-channel, high-efficiency hybrid audio power amplifier IC developed by Sanyo. It uses a "shift power supply" (Class H) design to provide high power output with reduced heat dissipation compared to traditional Class AB amplifiers. ⚡ Key Specifications
Output Power: 150W + 150W (at 0.7–0.8% THD, 20Hz to 20kHz). Operating Voltage: Recommended: ±45V DC. Maximum (No Signal): ±69V. Maximum (With Signal, 8Ω): ±62V. Load Impedance: Optimized for 6Ω to 8Ω loads. Package Type: SIP-ZIP (SIP18).
Thermal Limit: Operating substrate temperature up to 125°C. 🛠️ Essential Features
High Efficiency: Employs a shifting supply voltage that adjusts based on the input signal level to minimize power loss. stk412530 datasheet
Pin Compatibility: Part of a series (50W to 180W) that shares the same pin layout, allowing one PCB design to support multiple power grades.
Built-in Protection: Features thermal protection and short-circuit protection (allowable shorted time: 0.3s).
Low Distortion: Designed for high-fidelity audio with low total harmonic distortion (THD). 📐 Pinout & Implementation Common Functionality Pins 1, 15 The Pinout (Crucial for Repair) The datasheet provides
Typically Vcc+ and Ground (varies by specific series design) Pins 7, 8 Left and Right Channel Outputs Input Pins Requires a bipolar (symmetrical) power supply
STK412-530, УНЧ, 2 канала - Промэлектроника
Disclaimer: This information is aggregated from typical Sanyo/Sanken hybrid IC datasheets for the STK410-530 series. Always refer to the official datasheet for absolute maximum ratings and specific application circuit values. Pins 1-5: Front Left (+IN, NF, Vcc, OUT,
The datasheet provides a specific pin configuration (25-pin SIP). Unlike discrete transistor amps, misreading pin 1 on an STK module means instant destruction.
Critical note from the datasheet: The negative supply voltage (-Vcc) is shared across multiple pins. If you are repairing a unit, check the continuity of these pins to the main filter capacitors before applying power.
| Parameter | Condition | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | Quiescent Current | No signal | - | 45 | 80 | mA | | Output Power (1) | THD = 0.4% | 45 | 50 | - | W | | Output Power (2) | ( V_CC = \pm 30V), (R_L=6\Omega) | - | 40 | - | W | | Total Harmonic Distortion | ( P_O = 0.5W) to 40W | - | 0.08 | 0.4 | % | | Frequency Response | ( P_O = 1W), -3dB | 20 | - | 50k | Hz | | Input Impedance | | 30 | 50 | - | kΩ | | Voltage Gain | | 90 | 100 | 110 | (40dB typ) | | Output Noise Voltage | ( R_g = 10k\Omega ), IHF-A | - | 1.2 | 2 | mVrms | | Channel Separation | ( f=1kHz ) | - | 65 | - | dB |
The STK412-530 is a thick-film hybrid integrated circuit (Hybrid IC) manufactured by Sanyo (now part of ON Semiconductor). It is specifically designed for use as a stereo audio power amplifier in consumer electronics, particularly mid-to-high-end home stereo systems, mini component systems, and active loudspeakers.
Its primary advantage is providing a complete, high-fidelity two-channel (stereo) amplifier in a compact, easy-to-mount package, requiring very few external components.