CONTACT US
Saleline：0519-83822009
Tel：18706122270
Fax：0519-88739926
E-mail：xrm@czfhd.com
Address：Zhenglu Town, Tianning District,
Changzhou, Jiangsu
Copyright ©2018 Changzhou FHD electronics Co.,Ltd 苏ICP备16043500号-1
Powered by：www.300.cn
PRODUCTS
BM9040S
1.Technical Parameter
Measuring condition
Part shall be measured under a condition (Temperature: 5～35℃, Humidity: 45%～85%R.H., Atmospheric pressure: 860 ～1060hPa) unless the standard condition (Temperature: 25±3℃, Humidity: 60±10%R.H. Atmospheric pressure: 860 ～1060hPa) is regulated to measure.
|
1 |
Rated Voltage |
3Vo-p |
|
2 |
Operating Voltage |
2～5 Vo-p |
|
3 |
Rated Current |
Max.100mA ,at 2731Hz 50% duty Square Wave 3Vo-p |
|
4 |
Sound Output at 10cm |
Min. 85dB,at 2731Hz 50% duty Square Wave 3Vo-p |
|
5 |
Coil Resistance |
16±3Ω |
|
6 |
Resonant Frequency |
2731Hz |
|
7 |
Operating Temperature |
-20℃～+70℃ |
|
8 |
Store Temperature |
-30℃～+80℃ |
|
9 |
Net Weight |
Approx 0.8g |
|
10 |
RoHS |
Yes |
2.Dimensions Unit: mm
*Unit: mm; Tolerance: ±0.5mm Except Specified
*Housing Material: Black LCP
*Terminal plate: 2 soldering pads, tin Plating Brass
3.Electrical And Acoustical Measuring Condition
|
Recommended Driving Circuit
Resonant frequency, 1/2 duty cycle. Square wave. Signal amplitude should be large enough tosaturate the transistor. |
Recommended Setting  |
4.Frequency Response
3Vo-p 50% duty Square wave,10cm
5.Surface mounting condition
5.1 Reflow soldering
Recommendable reflow soldering condition is as follows.
Note: (1) In automated mounting of the SMD sound transducers on PCB, any bending, expanding and pulling forces or shocks against the SMD sound transducers shall be kept minimum to prevent them from electrical failures and mechanical damages of the devices.
(2) In the reflow soldering, too high soldering temperatures and too large temperature Gradient such as rapid heating or cooling may cause electrical failures and mechanical damages of the devices.
5.2 Soldering pattern
6.Reliability Test
After any following tests the part shall meet specifications without any degradation in appearance and performance except SPL. SPL shall not deviate more than -10 dB from the initial value
6.1 Ordinary Temperature Life Test
The part shall be subjected to 96 hours at 25±10℃. Input rated voltage
Resonant frequency, 1/2 duty Square wave.
6.2 High Temperature Test
The part shall be capable of with standing a storage temperature of +85℃ for 96 hours.
6.3 Low Temperature Test
The part shall be capable of with standing a storage temperature of -40℃ for 96 hours.
6.4 Humidity Test
Temperature:+40℃±3℃ Relative Humidity:90%～95% Duration: 48 hours
and expose to room temperature for 6 hours
6.5 Temperature Shock Test
Temperature:60℃ /1hour→ 25℃/3hours→-20℃/1hour→ 25℃/3hours (1cycle)
Total cycle: 10 cycles
6.6 Drop Test
Standard Packaging From 75cm(Drop on hard wood or board of 5cm thick, three sides, six plain.)
6.7 Vibration Test
Vibration:1000cycles /min. Amplitude:1.5mm, Duration: 1 hour in each 3 axes
6.8 Reflow Test
Use recommendable reflow soldering condition (as shown in 5.1)
(1) No abnormality should be found after reflow
(2) Good soldering to meet soldering requirements
Note:
As this product is not protected from foreign material entering, please make sure that any foreign materials (e.g. magnetic powder, washing solvent, flux, corrosive gas) do not enter this product in your production processes. The functional degradation (e.g. SPL down) may occur if foreign material enter it.
7. Packing
