產品說明0
PAM8302 D類 2.5W 單聲道 單音放大模組
PAM8302 2.5W 單聲道 D類 音訊功率模組 放大器模組 開發板模組
資料連結: https://pan.baidu.com/s/1893IM7iA85B985_Kewq4ag
提取碼: 8x2q
PAM8302 2.5W 單通道 D類 音頻功率 放大器模塊 開發板
This super small mono amplifier is surprisingly powerful - able to deliver up to 2.5 Watts into 4-8 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.0V-5.5VDC. Since the amp is a class D, its very efficient (over 90% efficient when driving an 8Ω speaker at over half a Watt) - making it perfect for portable and battery-powered projects. It has built in thermal and over-current protection but we could barely tell it got hot. There's even a volume trim pot so you can adjust the volume on the board down from the default 24dB gain. This board is a welcome upgrade to basic "LM386" amps!
這款超小型單聲道擴大機功率驚人，能夠為 4-8 歐姆阻抗的揚聲器提供高達 2.5 瓦的功率。微型晶片內部搭載了 D 類控制器，可在 2.0V-5.5VDC 的電壓範圍內工作。由於採用 D 類設計，這款擴大機效率極高（驅動 8 歐姆揚聲器，功率超過 0.5 瓦時效率超過 90%），非常適合便攜式和電池供電項目。它內建了過熱和過流保護，但我們幾乎感覺不到它發熱。此外，它還配備了音量微調電位器，方便您將板載音量從預設的 24dB 增益調低。這款電路板是對基本「LM386」擴大機的理想升級！
The A+ and A- inputs of the amplifier go through 1.0uF capacitors, so they are fully 'differential' - if you don't have differential outputs, simply tie the Audio- pin to ground. The output is "Bridge Tied" - that means the output pins connect directly to the speaker pins, no connection to ground. The output is a high frequency 250KHz square wave PWM that is then 'averaged out' by the speaker coil - the high frequencies are not heard. All the above means that you can't connect the output into another amplifier, it should drive the speakers directly.
擴大機的 A+ 和 A- 輸入端經過 1.0uF 電容，因此它們是完全差分的——如果沒有差分輸出，只需將 Audio- 引腳接地即可。輸出端是「橋接」的－這表示輸出引腳直接連接到揚聲器引腳，不接地。輸出是一個 250kHz 的高頻方波 PWM 訊號，然後由揚聲器線圈進行「平均」處理——高頻部分聽不到。以上所有特性意味著您不能將輸出連接到另一個擴大機，它應該直接驅動揚聲器。
Comes with a fully assembled and tested breakout board. We also include header to plug it into a breadboard and a 3.5mm screw-terminal blocks so you can easily attach/detach your speaker. You will be ready to rock in 15 minutes! Speaker is not included, use any 4 ohm or greater impedance speaker.
產品包含一個完全組裝並測試過的擴充板。我們還提供用於連接麵包板的排針和一個 3.5mm 螺絲端子，方便您輕鬆連接/拆卸揚聲器。只需 15 分鐘，即可開始您的音樂之旅！揚聲器需另行購買，請使用阻抗為 4 歐姆或更高的揚聲器。
- Output Power: 2.5W at 4Ω, 10% THD, 1.5W at 8Ω, 10% THD, with 5.5V Supply
輸出功率：4Ω負載下2.5W，10% THD；8Ω負載下1.5W，10% THD，5.5V電源供電 - 50dB PSRR at 1KHz
- Filterless design, with ferrite bead + capacitors on output.
無濾波器設計，輸出端採用鐵氧體磁珠+電容器。 - Fixed 24dB gain, onboard trim potentiometer for adjusting input volume.
固定增益 24dB，板載微調電位器用於調整輸入音量。 - Thermal and short-circuit/over-current protection
熱保護和短路/過流保護 - Low current draw: 4mA quiescent and 1uA in shutdown mode
低電流消耗：靜態電流 4mA，關斷模式下電流 1uA
