The STK411-210E is a thick-film hybrid integrated circuit (IC) manufactured by Sanyo, specifically designed as a 2-channel AF power amplifier for split power supply applications. It is part of the broader STK411-200 series, which is known for its pin compatibility and ease of design in audio amplification systems. Core Specifications
Based on technical data available from Scribd and Alldatasheet, the key characteristics include: Application: 2-channel (stereo) audio power amplification. Power Supply: Designed for split (dual) power supplies ( ±plus or minus Vcc). Total Harmonic Distortion (THD): Typically around (depending on specific operating conditions).
Output Power Range: The series typically covers a range from 6W to 50W per channel, allowing for design flexibility across different models.
Pin Compatibility: It is part of the STK4102II and STK4101V series, meaning these ICs can often be interchanged on the same PCB layout. Reference Resources
You can access the full technical manuals and diagrams through these databases:
AllDatasheet: Provides the standard STK411-210E PDF which includes internal equivalent circuits and test circuit diagrams.
Scribd: Hosts a detailed technical guide for the STK411-210E that outlines specific electrical characteristics and temperature ratings.
Datasheet Archive: Useful for finding pin-compatibility charts between the STK4112II and other related series. STK411-210E Datasheet, PDF - ALLDATASHEET.COM
| Parameter | Conditions | Min | Typ | Max | Unit | |-----------|------------|-----|-----|-----|------| | Quiescent current | No signal | – | 60 | 100 | mA | | Output power (both channels driven) | THD = 0.4% | 45 | 50 | – | W | | Total harmonic distortion | Po = 20W | – | 0.04 | 0.2 | % | | Intermodulation distortion | 60Hz : 7kHz = 4:1 | – | 0.04 | – | % | | Voltage gain | f = 1kHz | – | 40 | – | dB | | Input impedance | – | 27 | 33 | 40 | kΩ | | Output noise voltage | A-weighted, input shorted | – | 0.7 | 1.5 | mV | | Ripple rejection (VCC) | f = 100Hz, Vripple = 0.5Vrms | 35 | 40 | – | dB |
These specifications confirm that the STK411210E delivers clean, hi-fi grade audio suitable for demanding listening environments.
Note: exact numeric values vary by production batch and revision. A typical STK-class amplifier datasheet will include:
Designers refer to these specs to size power supplies, plan heatsinking, and ensure compliance with audio performance targets.
Common failure modes:
Troubleshooting steps:
Caution: Exceeding these values will damage the IC.
| Parameter | Symbol | Rating | Unit | |-----------|--------|--------|------| | Maximum supply voltage (no signal) | VCC max | ±39 | V | | Maximum supply voltage (with signal) | VCC | ±35 | V | | Peak output current | I_O peak | 10 | A | | Power dissipation (per channel) | P_D | 50 | W | | Junction temperature | T_j | +150 | °C | | Storage temperature | T_stg | -40 to +125 | °C | | Thermal resistance (junction-to-case) | θ_j-c | 1.5 | °C/W |
Important note: The STK411210E requires a well-dimensioned heatsink. With a typical stereo music signal, a 1.5°C/W heatsink (or better) is recommended to keep the junction temperature below 125°C.
The typical DC offset is under ±50mV. If you measure higher, replace the IC immediately, as it usually indicates internal damage.