Stk413-430 Circuit Diagram Today
Power supply section
Input section (Left channel shown)
Output & Bootstrap
Right channel is identical using pins 7, 6, 5, 2, 1, 4, 3.
Zobel network (per channel):
Muting (if present) – Usually not needed; leave unconnected.
The physical pin arrangement (front view, pins facing down) is as follows:
| Pin No. | Symbol | Description | |---------|--------|-------------| | 1 | +VCC | Positive power supply | | 2 | OUT L | Left channel output | | 3 | GND | Ground (negative rail return) | | 4 | -VCC | Negative power supply | | 5 | INV- L | Left channel negative feedback input | | 6 | NF L | Left channel ripple filter/feedback | | 7 | GND | Signal ground | | 8 | IN L | Left channel audio input | | 9 | IN R | Right channel audio input | | 10 | GND | Signal ground | | 11 | NF R | Right channel ripple filter/feedback | | 12 | INV- R | Right channel negative feedback input | | 13 | -VCC | Negative power supply | | 14 | OUT R | Right channel output | | 15 | +VCC | Positive power supply |
Note: Pins 1 and 15 (V+) must be connected together externally. Same for pins 4 and 13 (V-), and pins 3, 7, 10 to ground.
Pin 2 and Pin 4 control the amplifier's gain and linearity.
Probably not. For a fresh DIY build, a TDA2050 or LM3886 will give you far better sound quality, lower distortion, and easier sourcing. However, if you are:
…then the STK413-430 offers a fun, blinkered look into the past. Just keep your expectations realistic.
The audio signal enters through Pin 1 (Left) and Pin 5 (Right).
Refer to the exact STK413–430 model datasheet for:
(If you want, specify which exact STK number — e.g., STK413-130, STK416-070, STK430 — and your target supply voltage and speaker load, and I will produce a concrete schematic and parts values tailored to that exact module.)
Finding a dedicated, official datasheet for the STK413-430 audio amplifier IC can be tricky, as it was often manufactured for specific OEM applications (like JVC home theaters) rather than as a general-market component. Top Resources for STK413-430 Diagrams stk413-430 circuit diagram
Service Manual Workarounds: Because standalone datasheets are rare, the best "blog-style" technical advice is to use service manuals from devices that integrated this chip. A notable example is the JVC TH-A10 home theater system, which uses the STK413-430. You can find discussions and schematic downloads for this system on JustAnswer and similar repair forums.
Community Support: On the Cxem.net forum, hobbyists discuss the pinouts and peripheral components ("obves") needed to build custom amplifiers or car amps using these modules.
Module Guides: General guides for similar Sanyo STK modules (like the STK412-430) often share the same design philosophy, focusing on dual power supply (+/- voltage) and heat sink requirements to prevent failure. Essential Tips for Your Build/Repair
Check for Counterfeits: Modern replacements for these older Sanyo chips are often clones. Authentic modules usually have distinct physical markings and more robust performance.
Power Supply: These chips typically require a symmetrical (dual) power supply (e.g., +35V and -35V).
Diagnostics: If your amplifier is in "protect mode," the STK module is a primary suspect. You can use the circuit diagram to perform voltage measurements on the pins before replacing the entire unit. STK412 430 Circuit Diagram - AliExpress
The STK413-430 belongs to Sanyo’s legendary "thick-film" Integrated Circuit (IC) family. Known for its reliability and high-fidelity output, this hybrid IC is a staple in classic Hi-Fi systems and home theater receivers.
If you are looking to build a custom amplifier or repair a vintage unit, understanding the circuit diagram and pinout is essential. Overview of STK413-430 Technical Specs
The STK413-430 is a 3-channel power amplifier IC. It is designed to deliver consistent power across multiple channels, typically used for Front Left, Front Right, and Center channel configurations in audio-visual (AV) equipment.
Output Power: Approximately 50W to 100W per channel (depending on voltage and load). Operating Voltage: Dual power supply (typically ±30Vplus or minus 30 cap V ±45Vplus or minus 45 cap V
Package Type: Sanyo "SIP" (Single In-line Package) with a large metal heat sink plate. The STK413-430 Circuit Diagram Essentials
A standard circuit for the STK413-430 revolves around three main sections: the power supply, the input stage, and the output protection. 1. Power Supply Section This IC requires a split (dual) DC power supply.
VCC+ and VCC-: These are the main rails that power the output transistors.
Filter Capacitors: High-quality electrolytic capacitors (typically 4700µF or 10,000µF) are required to minimize ripple noise and provide "headroom" for bass peaks. 2. Input Stage Each channel has a dedicated input pin.
Coupling Capacitors: A non-polarized or high-quality film capacitor (usually 1µF to 2.2µF) is placed at the input to block DC voltage from reaching the IC. Power supply section
Gain Control: Resistors in the feedback loop determine the amplification factor. 3. Output Stage & Zobel Network
The output pins connect directly to the speakers, but a Zobel Network (an RC circuit consisting of a capacitor and a
resistor) is usually added between the output and ground. This prevents high-frequency oscillation and keeps the amplifier stable under varying speaker loads. Pinout Configuration
While you should always consult the specific datasheet for your PCB layout, the general layout for the STK413 series follows this logic: Pins 1-3: Channel 1 Input/Feedback. Central Pins: Positive and Negative Power Supply ( +Vccpositive cap V sub c c end-sub −Vccnegative cap V sub c c end-sub ) and Ground. Outer Pins: Channel Outputs and Standby/Mute controls. Building & Repair Tips
Thermal Management: The STK413-430 generates significant heat. You must use a large aluminum heatsink and apply a thin, even layer of thermal silicone grease between the IC and the sink.
Muting Circuit: Pin 18 (typically) handles the "Standby" or "Mute" function. If your circuit isn't producing sound, check that the voltage on this pin is correct; otherwise, the IC remains in "protection mode."
Counterfeit Warning: Since Sanyo discontinued many STK modules, the market is flooded with "clones." Authentic modules have crisp, centered printing and a heavy, high-quality base plate. Conclusion
The STK413-430 remains a favorite for DIY enthusiasts because it packs three channels of Class AB power into a single component. By following the standard application circuit and ensuring robust cooling, you can achieve professional-grade audio performance with minimal external components.
Are you planning to build a new amplifier from scratch, or are you troubleshooting an existing unit?
The STK413-430 is a hybrid integrated circuit (IC) developed by Sanyo (now part of ON Semiconductor) and Sanken, specifically designed for high-fidelity audio power amplification. Known for its robust performance in home theaters and professional audio setups, it offers a compact solution for delivering high-wattage output with minimal external components. Key Specifications & Features
The STK413-430 is part of a pin-compatible series, meaning you can often swap it with other modules in the family to adjust power ratings without redesigning the PCB. Configuration: 2-channel (stereo) AF power amplifier. Max Supply Voltage: Thermal Resistance: 3.0∘C/W3.0 raised to the composed with power C/W
Muting Circuit: Features a built-in muting function to eliminate "pop" noise during power-up or switching.
Pin Compatibility: Shared pinout with the STK4102II and STK4101V series, allowing for easy interchangeability across different power ranges (typically 6W to 50W). Circuit Diagram & Typical Application
A standard application for the STK413-430 involves a split power supply (positive, negative, and ground) to ensure high-fidelity sound reproduction and low distortion.
Input Section: Audio signals (from a pre-amp or MP3 module) enter through decoupling capacitors to block DC voltage. Input section (Left channel shown)
Amplification Stage: The internal hybrid circuitry handles the voltage and current gain. It utilizes a current mirror circuit to maintain low total harmonic distortion (THD).
Output Section: The amplified signal is sent to the speakers (typically
Protection: Because these chips can run hot, they require a substantial heat sink. The STK413-430 is rated for high-temperature operation (up to 125∘C125 raised to the composed with power C
substrate temperature), which allows for slightly smaller heat sinks compared to older models. Common Applications STK413-430 SANYO HYB-22 Modules - Veswin Electronics
The STK413-430 is a thick-film hybrid integrated circuit designed by Sanyo, primarily used as a 3-channel power amplifier for audio applications. It is part of the STK410 series, known for its "insulated metal substrate" technology that provides excellent heat dissipation and high-quality audio reproduction. STK413-430 Pinout & Functionality
This IC typically features a 22-pin SIP (Single In-line Package). While specific pin functions vary slightly by manufacturer implementation, the general layout includes:
Audio Inputs (CH1, CH2, CH3): Pins dedicated to receiving the low-level pre-amp signals. Power Supply ( +VCCpositive cap V sub cap C cap C end-sub −VEEnegative cap V sub cap E cap E end-sub
): Split rail power pins to drive the high-power output stages.
Standby/Muting: Control pins used to eliminate "thump" noises during power-on/off.
Speaker Outputs: Direct outputs for the three amplified channels. Typical Application Circuit Diagram
In a standard configuration, the STK413-430 is set up with minimal external components to maintain signal integrity. Input Stage: Uses coupling capacitors (typically ) to block DC voltage from entering the IC. Feedback Loop: External resistors ( Rfcap R sub f ) and capacitors ( Cfcap C sub f ) define the voltage gain and frequency response. Output Protection: A Zobel network (
in series to ground) is usually added to the output pins to prevent high-frequency oscillation and ensure stability with inductive speaker loads. Filtering: Large electrolytic capacitors (typically or higher) are required on the +VCCpositive cap V sub cap C cap C end-sub −VEEnegative cap V sub cap E cap E end-sub lines to provide current reservoirs for bass peaks. Technical Specifications Value (Typical) Output Power ~50W to 100W per channel (load dependent) Operating Voltage Recommended ±35Vplus or minus 35 cap V ±45Vplus or minus 45 cap V THD (Total Harmonic Distortion) at rated power Frequency Response 20Hz20 cap H z 50kHz50 k cap H z Design Considerations
Thermal Management: Because this IC handles three channels in one package, it generates significant heat. A large aluminum heatsink is mandatory. Thermal grease should be applied evenly between the IC's metal backing and the heatsink.
Power Supply: Use a center-tapped transformer with a bridge rectifier. Ensure the voltage does not exceed the absolute maximum rating (often around ±60Vplus or minus 60 cap V ), as hybrid ICs are very sensitive to overvoltage.
Grounding: A "Star Ground" configuration is highly recommended to prevent ground loops and hum, especially since there are multiple audio channels sharing a single substrate.
Are you looking to repair an existing unit or are you building a new amplifier from scratch? Knowing this will help me provide specific component values for the feedback network.