Introduction of Use:
PAM8403 is a highly efficient D-grade digital amplifier that eliminates traditional LC networks and reduces EMI value over LC. Low voltage maximum power output, super power saving, built-in standby electronic switch, built-in high gain buffer amplifier, built-in short circuit protection. Input 5V will get 3W + 3W (4Ω) output power. It can be powered by one cell lithium battery or USB or powered from four 1.5V batteries, but you need to add 5V voltage regulator circuit to supply power the transformer. It is recommended that you use one USB 5V or lithium battery to power it.
Application:
LCD TV/Monitor, Megaphone, Laptop, Portable Speaker, Card Speaker, Portable DVD Player, Game Console, Cellphone/Hands-Free Phone, Board Size: 15.5*24mm Very suitable for electronic enthusiasts DIY learning.
Benefits:
Built-in special output processing circuits eliminate traditional LC networks, and lower EMI value than LC. Low voltage maximum power output, super power saving, built-in standby electronic switch, built-in high gain buffer amplifier, built-in short circuit protection. Power Supply: 3.6 - 5.5 V, single cell lithium battery or USB power supply is suitable, and you need to add the power of the transformer. It can be powered by 4 1.2 V batteries, and the chip above 5.5 V will burn out.
Note:
1: The positive and negative poles of the power supply cannot be reversed, and the power supply voltage can not exceed 5.5V. These two violations may cause damage to the IC.
2: There is a high gain buffer on the chip. The parameters of the components on the board cannot be changed. The inappropriate parameters may cause damage to the IC.
3: Use the shielding wire as much as possible for the input line. It has anti-interference effect and can eliminate crater current.
4: Output is a BTL drive mode of CMOS tube. The left and right speakers can not be connected to the negative poles, which means the 4 lines connecting the horn are completely independent and cannot be connected together.