Red Board PAM8403 Ultra Mini Digital Power Amplifier Board Small Power Amplifier Board High-power 3W Dual ChannelItem NO.: HW-323

PAM8403 Ultra Mini Digital Power Amplifier Board

HW-323

Product Information:

Ultra mini digital power amplifier board, high efficiency digital power amplifier, can obtain [3 x 2] 6W power when inputting 5V. The ultra-thin board can be easily put into the gap of small plastic box or other equipment, such as making MP3/4 or notebook external small speakers. As you can imagine, it is recommended to use 5V of USB or single lithium battery for power supply.

Product Features:

● Internal special output processing circuit eliminates the traditional LC network and has lower EMI value than LC! Maximum power output at low voltage, super power saving

● Built in standby electronic switch,

● Built in high gain buffer amplifier,

● Built in short circuit protection.

● The power supply is 3.6 to 5.5V. Single lithium battery or USB power supply is suitable. Four 1.2V batteries can also be used for power supply. When using transformer to supply power, a 5V voltage stabilizing circuit must be added. If the power supply exceeds 5.5V, the chip will be burned out.

Product Parameters:

● Power supply: DC 3.6v － 5.5V

● Output power: 3W+3W (4 Ω)

● Signal to noise ratio: 90dB

● Efficiency:>90%

● Module size: 24 * 15.5 * mm

● Spacing dimension of positioning holes: 20mm

● Aperture: 2mm

Matters Meeding Attention:

1: The positive and negative poles of the power supply shall not be connected reversely, and the power supply voltage shall not exceed 5.5 V. These two violations will cause damage to the IC.

2: There is a high gain buffer in the chip, and any component parameters on the board cannot be changed. If the parameters do not meet the requirements, the IC will be damaged.

3: Please use shielded lines as input lines as far as possible, which can play an anti-interference role and eliminate clutter current sound.

4: The output is a cmos BTL drive mode. The negative poles of the left and right speakers cannot be connected together, that is, the four lines connected to the speakers are completely independent, and cannot be connected together!