Stk411210e - Datasheet

STK411210E Datasheet: A Complete Guide to Pinout, Specifications, and Application Circuits

6. STK411-210E vs. Common Substitutes

Since Sanyo discontinued the STK series, originals are scarce. Beware of cheap counterfeits from China (they often blow up immediately).

| Model | Power (approx) | Compatibility | | :--- | :--- | :--- | | STK411-210E | 50W | Original reference | | STK412-130 | 60W | Pin compatible (higher voltage) | | STK410-150 | 40W | Pin compatible (lower voltage) |

Recommendation: If you cannot find a genuine STK411-210E (check the backplate for proper laser etching), consider building a discrete amplifier or use a modern module like the TDA7294 or LM3886, which are electrically similar but require PCB adapters.

Safety and Precautions

When working with electronic components, including the stk411-210E, it's essential to follow proper safety precautions: stk411210e datasheet

• Ensure the power supply is off when making connections.
• Use appropriate bypass capacitors and heat sinking to prevent overheating and damage.

4. Electrical Characteristics

Typical values measured at Ta = 25°C, Vcc = ±26V, RL = 6Ω, f = 1kHz.

| Parameter | Symbol | Conditions | Min | Typ | Max | Unit | | :--- | :---: | :--- | :---: | :---: | :---: | :---: | | Quiescent Current | Icco | Vin = 0V | - | 50 | 100 | mA | | Output Power | PO | THD = 0.5% | 35 | 40 | - | W | | Total Harmonic Distortion | THD | PO = 1W | - | 0.02 | 0.1 | % | | Voltage Gain | GV | Vin = 0dB | 28 | 30 | 32 | dB | | Input Impedance | Ri | - | - | 55 | - | kΩ | | Output Noise Voltage | Vno | Rg = 10kΩ | - | 0.25 | 0.7 | mV | | Frequency Response | BW | -3dB points | 20 | - | 20k | Hz | | Ripple Rejection Ratio | RRR | f = 100Hz | 45 | 55 | - | dB |

Note: Specifications vary depending on the specific application circuit and heatsink thermal capacity. Ensure the power supply is off when making connections

5. Pin Configuration

The STK411-210E typically utilizes an 18-pin Single Inline Package (SIP).

| Pin No. | Function | Description | | :---: | :--- | :--- | | 1 | Input (Ch 1) | Audio Signal Input for Channel 1 | | 2 | NFB (Ch 1) | Negative Feedback input for Channel 1 | | 3 | Pre-GND | Ground for the pre-driver stage | | 4 | Pre-Vcc (-) | Negative Supply for pre-driver stage | | 5 | NFB (Ch 2) | Negative Feedback input for Channel 2 | | 6 | Input (Ch 2) | Audio Signal Input for Channel 2 | | 7 | Mute/Standby | Control pin for muting function | | 8 | Power GND | Ground for power output stage | | 9 | Output (Ch 2) | Speaker Output for Channel 2 | | 10 | Power Vcc (-) | Negative Power Supply for Ch 2 | | 11 | Power Vcc (+) | Positive Power Supply for Ch 2 | | 12 | Boot (Ch 2) | Bootstrap connection for Ch 2 | | 13 | NC | No Connection | | 14 | Boot (Ch 1) | Bootstrap connection for Ch 1 | | 15 | Power Vcc (+) | Positive Power Supply for Ch 1 | | 16 | Power Vcc (-) | Negative Power Supply for Ch 1 | | 17 | Output (Ch 1) | Speaker Output for Channel 1 | | 18 | Pre-Vcc (+) | Positive Supply for pre-driver stage |

(Note: Pinouts may vary slightly by revision. Always verify the specific footprint on the physical package metal casing.) predictable frequency response

Functional overview and typical block-level architecture

At its core the STK411210E is a multi-stage power amplifier module combining:

• Differential input stages for common-mode rejection and DC offset control.
• Voltage amplification stage (VAS) for headset gain and linearity.
• Current gain/output stage (often a complementary push-pull arrangement) capable of driving loudspeaker loads (commonly 4–8 ohms).
• Bootstrap and bias networks to set output quiescent current and improve output swing.
• Protection and limiting features (thermal protection, overcurrent/short-circuit tolerance) — depending on the exact variant and datasheet specifics.

The module reduces discrete component count for designers by embedding matched transistors, biasing networks, and compensation elements. This integration simplifies achieving stable gain, predictable frequency response, and acceptable distortion figures.

Features

While specific features can vary, a typical datasheet for the stk411-210E might include:

• High-quality audio: The IC is designed to provide high-quality audio output with low distortion.
• Dual audio power amplifier: It often contains two channels of audio amplification, making it suitable for stereo applications.
• Wide operating voltage range: Allowing it to be used in a variety of applications with different power supply configurations.
• Built-in protection circuits: Such as thermal protection and short-circuit protection to enhance reliability and durability.