PAM8403 Amplifier Module High Power 2-Channel 3W Audio Super Mini Digital Amplifier Circuit Board

XH-M179 PAM8403 Amplifier Module High Power 2 Channel 3W Audio Super Mini Digital Amplifier Board Features: Special internal output processing circuit, eliminating the traditional LC network, EMI value is lower than the LC! Maximum power output at lower voltages, ultra high power internal electronic switch bracket, built-in high gain buffer amplifier Built-in short circuit protection. "Power": 3.6 to 5.5V, single lithium battery or USB power supply is appropriate, it can be four 1.2V battery, the power transformer must be added 5V regulator circuit chip to burn more than 5.5V. parameter: Power: DC (DC): 3.6V-5.5V Output power: 3W + 3W (4Ω) SNR: 90dB Efficiency:> 90% Size: 24 * 15.5 * mm Positioning hole size: 20mm Pitch spacing: 2mm note: 1: Positive and negative power supply can not be reversed, the supply voltage can not exceed 5.5V, these two violations may cause IC damage. 2: On-chip high-gain buffer, board can not change any component parameters do not meet the parameters will cause IC damage. 3: Please try to use shielded cable input cable, can play a role in anti-jamming, clutter current to eliminate the sound. 4: Output CMOS tube In BTL drive mode, the speakers can not be together negative, that is, the four lines connecting the speakers are completely independent and do not allow total access!