Characteristic, 1 electrical and mechanical characteristics, 400 mm – BeStar BPT2909H7.5 LF User Manual
Page 2: 100mm, 2 test method, Piezo sounder, Recommended circuit, Standard test fixture
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BPT2909H7.5 LF
DRG NO: BS/TEP01.215C
Piezo Sounder
Date:
Checked by:
Drawn by:
Approved by:
邱 俊
Drawn
A
Date
REV.
12/02/14
C
Note
B
12/02/14
张秀琴
赵 峥
邱 俊
C
A
Page:2 of 6
B
C
Item Specification
Rated Voltage(Square Wave) 9Vp-p
Operating Voltage 1-30Vp-p
*Rated Current max.5mA
*Sound Output at 10cm ,2500Hz min.85dB
Resonant Frequency 2500Hz
Capacitance at 120Hz 20000 30% pF
Operating Temperature -40...+85 C
Storage Temperature -40...+85 C
Weight 5g
*Value applying at rated voltage.
D
E
F
D
E
F
1.1 Electrical and Mechanical Characteristics
G
1. Characteristic:
4
5
6
BPT2909H7.5 LF
H
2
3
G
1
H
No reaction in space with in 400mm in all direction
Sounder
the following are examples of externally driven circuits.
1) Unstable multi-vibrator using Tr.
2) Circuits using inverters or NAND gates.
0.01 F
1)
510
20k
1k
0.01 F
Input
20k
510
+V
1k
400
mm
120k
1k
1k
0.01 F
2)
1M
+V
100mm
1.21.Recommended Circuit
1.2 Test method:
1.22.Standard test Fixture