1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your DROK PAM8406 5W+5W Mini Audio Amplifier Board. This digital stereo power amplifier module is designed for various audio projects, offering dual-channel output with efficient Class D amplification.
Key Features:
- Compact Design: Mini power amplifier board suitable for DIY audio projects.
- High Efficiency: Over 90% efficiency with low quiescent current and noise suppression.
- Protection Features: Includes input reverse connection protection, short circuit protection, and over-heat protection.
- Adjustable Modes: Supports switchable Class D and Class AB amplifier types, and an external shutdown function.
- Quality Components: Features a black immersion gold circuit board, KEMET speaker capacitors, and gold-plated audio input terminals.
2. Safety Information
Please read and understand all safety precautions before operating this device. Improper use can result in electric shock, fire, or damage to the product.
- Ensure the power supply voltage is within the specified range (DC 5V).
- Avoid short-circuiting the output terminals.
- Do not expose the board to moisture or extreme temperatures.
- Handle with care to prevent damage to electronic components.
- Disconnect power before making any connections or adjustments.
3. Package Contents
The package typically includes:
- 1 x DROK PAM8406 5W+5W Mini Audio Amplifier Board
Note: Additional accessories like speakers, power supply, and audio cables are sold separately.
4. Product Overview
Familiarize yourself with the components and layout of the amplifier board.
Figure 4.1: Amplifier Board Component Layout
This image displays the top view of the amplifier board with labels indicating the input port for a 3.5mm audio cable, DC power input terminals (DC power + and -), left and right channel speaker output terminals (L+, L-, R+, R-), and the volume adjustment knob.
Figure 4.2: Amplifier Board Bottom View with Mode Settings
This image shows the underside of the amplifier board, highlighting the jumper settings for MODE (Class D or Class AB) and SD (Shutdown Enable/Disable).
Component Descriptions:
- DC Power Input: Connects to a DC 5V power source.
- Audio Input Port: 3.5mm jack for connecting audio sources.
- Speaker Output Terminals: Screw terminals for connecting left (L+, L-) and right (R+, R-) channel speakers.
- Volume Adjustment Knob: Rotates clockwise to increase volume, counter-clockwise to decrease volume.
- MODE Jumper: Selects amplifier type (High for Class D, Low for Class AB).
- SD (Shutdown) Jumper: Controls chip shutdown (High for Disable, Low for Enable).
5. Setup
Follow these steps to correctly set up your amplifier board.
Wiring Diagram:
Figure 5.1: Basic Wiring Example
This diagram illustrates how to connect a 3.5mm audio input source, a DC 5V power supply (e.g., battery), and two small speakers to the amplifier board.
Step-by-Step Connection:
- Connect Speakers: Connect your speakers to the 'R+' and 'R-' terminals for the right channel, and 'L+' and 'L-' terminals for the left channel. Ensure correct polarity.
- Connect Power Supply: Connect a DC 5V power source to the '+DC5V' and '-DC5V' terminals. Observe correct polarity (+ to +, - to -) to prevent damage. The board features input reverse connection protection.
- Connect Audio Input: Plug your 3.5mm audio cable from your audio source (e.g., smartphone, MP3 player) into the 'Audio IN' port on the amplifier board.
- Set Mode (Optional): If desired, adjust the MODE jumper. By default, it is set to high electricity level (Class D). For Class AB, set it to low electricity level.
- Set Shutdown (Optional): If desired, adjust the SD jumper. By default, it is set to high electricity level (Shutdown Disable). For Shutdown Enable, set it to low electricity level.
6. Operating Instructions
Once connected, operate the amplifier board as follows:
- Power On: Ensure all connections are secure, then apply power to the DC 5V input. The power indicator LED on the board should illuminate.
- Volume Control: Rotate the volume knob clockwise to increase the audio output level and counter-clockwise to decrease it.
- Play Audio: Start playing audio from your connected source.
- Mode Switching: If you changed the MODE jumper, the amplifier will operate in either Class D (high efficiency, default) or Class AB (lower power consumption, higher fidelity for some applications).
- Shutdown Function: If the SD jumper is set to 'Shutdown Enable' (low electricity level), applying a low signal to the SD pin will shut down the chip. The factory default is 'Shutdown Disable' (high electricity level).
Demonstration Video:
Video 6.1: DROK 5W+5W Mini Amplifier Board Overview
This video provides a visual overview and demonstration of the DROK 5W+5W Mini Amplifier Board, showcasing its features and basic operation.
7. Specifications
| Parameter | Value |
|---|---|
| Working Voltage | DC 5V |
| Output Power | 5W (2Ω 5V) / 3W (4Ω 5V) / 1.8W (8Ω 5V) |
| Input Method | Monaural Input |
| Efficiency | Over 90% |
| General Harmonic Distortion Noise | Less than 10% |
| Number of Channels | 2 (Dual Channel) |
| Mounting Type | Surface Mount |
| Material | Circuit Board |
| Item Weight | 0.64 ounces |
| Package Dimensions | 3.74 x 2.83 x 0.55 inches |
| Model Number | 2001711002 |
Figure 7.1: Amplifier Board Dimensions
This image provides the physical dimensions of the amplifier board, including length, width, and height of the components.
8. Troubleshooting
If you encounter issues with your amplifier board, refer to the following common problems and solutions:
- No Sound Output:
- Check all wiring connections, especially power and speaker terminals, for secure contact and correct polarity.
- Ensure the audio input cable is fully inserted and functional.
- Verify the audio source is playing and its volume is turned up.
- Confirm the power indicator LED on the board is lit. If not, check the power supply.
- Distorted Sound:
- Reduce the input volume from your audio source or the amplifier's volume knob to prevent clipping.
- Ensure speakers are correctly matched to the amplifier's impedance and power output.
- Check for loose or faulty speaker connections.
- Overheating:
- Ensure adequate ventilation around the amplifier board.
- Verify that the speaker impedance is not too low, which can cause excessive current draw.
- Reduce the output volume if operating at high levels for extended periods.
- Power LED Not On:
- Check the DC 5V power supply connection and ensure it is providing the correct voltage.
- Verify the power supply is capable of delivering sufficient current.
- Check for any short circuits in the power input wiring.
9. Maintenance
To ensure the longevity and optimal performance of your DROK amplifier board, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to gently clean the board. Avoid using liquids or abrasive cleaners.
- Storage: Store the board in a dry, dust-free environment when not in use.
- Inspection: Periodically inspect connections for looseness or corrosion.
- Environmental Conditions: Operate the board within its specified temperature and humidity ranges.
10. Warranty and Support
DROK products are designed for reliability and performance. For specific warranty details and technical support, please refer to the official DROK brand store or contact customer service.
- Warranty: Each product purchased from DROK typically includes a one-year service period. Quality issues may qualify for a replacement.
- Support: For further assistance, visit the DROK Brand Store on Amazon.
