Unlike standard Class AB amplifiers that waste excessive energy as heat, the STK412-530 uses a "shift power supply". It dynamically switches between low-voltage and high-voltage power rails depending on the volume of the incoming audio signal, dramatically cutting thermal waste.
: For normal or quiet audio signals, the internal driver stages draw power strictly from the lower voltage rail ( stk412530 datasheet
The STK412530 is a designed for audio power amplification. Manufactured by Sanyo (now ON Semiconductor), these modules are essentially "amps on a chip." Inside the plastic casing, you will find a mix of thick-film technology and discrete semiconductor components, including power transistors mounted on a metal heatsink. Unlike standard Class AB amplifiers that waste excessive
| Parameter | Conditions / Test Conditions | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | | No signal | ±18 | - | ±36 | V | | Supply Voltage (VCC) | With signal | - | - | ±44 | V | | Quiescent Current (ICCO) | VCC = ±36V, no signal | - | 100 | 120 | mA | | Output Power (PO) | VCC = ±36V, RL = 4Ω, THD = 0.08% | - | 50 | - | W/ch | | Output Power (PO) | VCC = ±52V / ±26V (H-class), RL = 8Ω | - | 80 | 120 | W/ch | | Total Harmonic Distortion (THD) | f = 1kHz, PO = 30W, RL = 8Ω | - | - | 0.08 | % | | Frequency Response | VCC = ±36V, PO = 20W, RL = 8Ω | 20 | - | 50k | Hz | | Input Impedance (ri) | f = 1kHz | - | 56 | - | kΩ | | Damping Factor (DF) | f = 1kHz, RL = 8Ω | - | 60 | - | - | | Voltage Gain (VG) | f = 1kHz, RL = 8Ω | - | 40 | - | dB | | Output Noise Voltage (VNO) | Input grounded, IHF-A | - | 0.6 | 1.2 | mV | | Storage Temperature (Tstg) | No bias | -30 | - | +100 | °C | | Load Short Protection Time | Any load short to GND or VCC | - | - | 0.3 | s | Manufactured by Sanyo (now ON Semiconductor), these modules
Requires very few external resistors and capacitors. 2. Technical Specifications