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      HN ELECTRONIC

      專業從事電磁式蜂鳴器、壓電式蜂鳴器生產及研發

      MLT-7525

      MLT-7525

      MLT-7525

      MLT-7525

      MLT-7525

      MLT-7525

      MLT-7525

      MLT-7525

      產品說明

      1.測試條件

      產品測試條件:溫度:5~35℃, 濕度:45%~85%R.H., 氣壓:860 ~1060hPa。
      標準測試條件:溫度:25±3℃, 濕度:60±10%R.H.  氣壓:860 ~1060hPa

      1 額定電壓(Vo-p) 3.0Vo-p
      2 工作電壓(Vo-p) 2.5~4.5 Vo-p
      3 額定電流 (mA) Max.100mA ,at 4000Hz 50% duty Square Wave 3.0Vo-p
      4 輸出音壓(dB)10cm Min. 75dB,at 4000Hz 50% duty Square Wave 3.0Vo-p
      5 電阻(Ω12±3Ω
      6 諧振頻率(Hz) 4000Hz
      7 工作溫度(℃) -20℃~+70℃
      8 儲存溫度(℃) -40℃~+85℃
      9 凈重(g) Approx 0.5g
      10 環保 Yes

      2.尺寸圖 單位: mm

      *基本公差: 除特殊注明外,一般公差為±0.3mm
      *外殼材料l: Black LCP
      *端子焊盤: 3個黃銅鍍錫焊盤


      3.電性能及聲音測試條件

      測試電路 測試裝置

      諧振頻率是占空比為50% 的方波,信號電壓要足夠讓晶體管飽和工作。


      4.頻響曲線


      在3.6Vo-p占空比為50%的方波,測試距離為10cm的條件


      5. 回流焊條件

      5.1回流焊曲線圖


      注意事項: (1) 產品經過回流焊機后,所有電性能要保持在規格書的范圍內。
      (2)回流焊的操作溫度一定要在推薦范圍之內。如果超出范圍都有可能影響到產品的性能。

      5.2焊盤位置


      6. 可靠性測試
      在下面任何一項測試后都要符合以下標準,外觀和電性能(除聲壓外)上不能有不良或衰減現象出現,聲壓不能低于規格說明書的最低聲壓的10dB。
      6.1壽命測試6.2高溫測試
      將測試件置于+85℃的溫度下存放96小時,取出置于常溫下3小時而后測試。

      6.3低溫測試
      將測試件置于-40℃的溫度下存放96小時,取出置于常溫下3小時而后測試。

      6.4濕度測試
      將測試件置于溫度+40±3℃,濕度90%~95%的條件下持續48小時,再置于室溫下6小時而后測試。

      6.5溫度沖擊測試
      將測試件置于以下溫變條件下:70℃2小時→-20℃2小時(1周期),做完一個周期實驗,過1個小時后再繼續下一次實驗,總測試周期數: 10個周期。

      6.6落地測試
      將測試件標準包裝后(包裝盒的3個邊6個面)從1.2米的高度下跌落到厚木板或5厘米厚的硬木板上。

      6.7機械振動測試
      按以下條件實驗后再測試:振速:1000次/分;振幅:1.5毫米;時間: 1小時更換一個自由度方向共3個自由度方向。

      注意:
      需避免無關材料進入產品內,無關材料如:磁性材料、水溶性的材料、腐蝕性的氣體等。因為這些無關材料將會影響產品的電性能。

      7.包裝

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