Brief Introduction
- Welcome to use this self-made 2*150mW（8Ω）audio amplifier board which is a perfect class-AB architecture integrated LM4881 chips to achieve the single-channel 150mW power output. Moreover, integrated with LM4881 chip, this board also supports two-channel amplification and can be powered by any DC power supply ranging from 8V to 24V
- Net weigt:48g /1.69oz
Feature:
- Size:76.2 mm (L) x 50.8 mm (W) x 12.1 mm(H) ± 0.2mm
- Thermal shutdown protection circuitry
- Adjustable gain
- Wide power supply range: 8V-24V
- Audiophile Quality Sound:
- 0.025% THD+N @120mWrms 16Ω
- 0.02% THD+N @75mWrms 32Ω
Applications:
- Mini/Micro Systems
- Personal Computers
- Microphone Preamplifier
- MP3 Video CD Output Amplification
Benefits:
- Mounting holes facilitate installation and fixing
- Several wiring methods facilitate connection： Socket (Default),Terminal Block(Optional)
- Excellent design of the power ports which allows you to connect multiple amplifier boards in series (Terminal Block Optional).
- Do not need an extra heat sink.
Power Connections:
Connector Mark | Description | Jack | J8 | DC power supply socket | Terminal Blocks | J7 | VCC | The positive of power supply socket | GND | The negative of power supply socket |
Input Connections:
Connector Mark | Channel Description | 3.5mm Stereo Jack | J1 | Audio Output | TerminalBlocks(Optional） | J3 | Channel 1 output | GND | J5 | Channel 2 output | GND |
Output Connections:
Connector Mark | Channel Description | 3.5mm Stereo Jack | J1 | Audio Output | TerminalBlocks(Optional） | J3 | Channel 1 output | GND | J5 | Channel 2 output | GND |
Note: Amphenol connector needs addtional purchase
Electrical Characteristics:
Parameter | Condition | Min. | Typ. | Max. | Supply Voltage（V） | - | 8 | 12 | 24 | Quiescent Current（mA） | VIN = 0V, IO = 0A | - | 3.6 | 6.0 | Output Power (mW) | THD = 0.1% ;
RL = 8Ω | | 150 | -
|
Gain（dB） | SW1 OFF | - | 9.6 | -
|
SW1 ON | - | 15.7 | | Input Impedance（kohm） | SW1 ON | - | 1.7 | - | SW1 OFF | | 3.3 | Load Impedance（ohm） | - | - | 8 | - | 16 | 32 | Frequency Response(Hz) | ±3dB | 50 | - | 600K | Operating Temperature（℃） | - | 0 | 20 | 70 | Storage Temperature（℃） | - | -20 | 20 | 105 |
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