Operating the module outside these absolute limits can cause immediate breakdown of the internal output transistors. Designs should maintain a safe voltage margin well below these maximum limits. Operating Condition / Load Impedance Maximum Value No Input Signal Present Maximum Supply Voltage 2 Audio Signal Present ( Maximum Supply Voltage 3 Audio Signal Present ( Low-Rail Supply Voltage 1 No Input Signal Present Low-Rail Supply Voltage 2 Audio Signal Present ( Low-Rail Supply Voltage 3 Audio Signal Present ( Substrate Temperature ( Tccap T sub c ) Maximum Operating IC Substrate Limit 125∘C125 raised to the composed with power C Storage Temperature Module Storage Range Electrical & Audio Performance Characteristics
The original STK412-530 is (discontinued by Sanyo/ON Semi). However, its datasheet is still available from:
: Found in professional audio equipment, multi-channel home theatre receivers, and high-end stereo systems. stk412530 datasheet
The STK412‑530 incorporates several features that set it apart from standard audio amplifier ICs:
The shift power supply is a form of Class H operation. The IC monitors the input audio signal and switches the voltage supplied to the power transistors between two (or more) levels. When the signal is low, the supply voltage is reduced, saving power. When a high‑amplitude peak occurs, the supply is switched to a higher voltage, allowing the amplifier to deliver maximum power cleanly. This technique significantly improves efficiency without sacrificing audio quality. Operating the module outside these absolute limits can
Unlike traditional monolithic or discrete Class AB solid-state designs, the STK412-530 relies on a specialized Class H-compatible shift power supply architecture.
Note: Always verify against the specific manufacturer’s datasheet, as pin 13-15 functions may vary in some revisions. However, its datasheet is still available from: :
This is a power IC. Attach a large heat sink and consider a fan if you're pushing it at 4-ohm loads. Where to Buy?
While you should always consult the official manufacturer datasheet for exact tolerances, here are the typical operating parameters for the STK412530 series: