Piezoelectric buzzer
The piezoelectric buzzer is an electroacoustic element composed of a piezoelectric ceramic sounding element and an oscillating circuit.
The piezoelectric buzzer is mainly composed of a multivibrator, a piezoelectric buzzer, an impedance matching device, a sound box and a shell. Some piezoelectric buzzers are also equipped with light-emitting diodes on the housing. A multivibrator consists of a transistor or an integrated circuit. When the power supply is turned on (1.5~15V DC operating voltage), the multivibrator vibrates, outputs 1.5~2.5kHZ audio signal, and the impedance matcher drives the piezoelectric buzzer to sound.
Piezoelectric buzzers can be divided into: passive piezoelectric buzzer (external drive series), active piezoelectric buzzer (including drive series), self-excited piezoelectric buzzer.
The characteristics of piezoelectric buzzer are: small size, light weight, thin thickness, power consumption, good reliability, low cost. Therefore, it is suitable for electronic watches, pocket calculators, electronic doorbells and electronic toys and other small electronic products as sound devices. Electronic clock, electrical products, anti-theft alarm, underground alarm, smoke alarm and electronic toy sound use. It can also be used as an acoustic sensor for voice-activated toys.
B、SPECIFICATION 规格
No. | Item | Unit | Specification | Condition |
1 | Rated Voltage 额定电压 | Vp-p | 5 | |
2 | Operating Voltage 操作电压 | Vp-p | 1-20 | |
3 | Sound Pressure level 输出音压（小） | dB | Min.82 | at 10cm at Rated Voltage |
4 | Rated current 消耗电流（大） | mA | Max5 | |
5 | Frequency of output Signal 输出频率 | KHZ | 4.0 ±0.5 | Square Wave |
6 | Operating Temp 操作温度 | ℃ | -20～60 | |
7 | Storage Temp 储存温度 | ℃ | -30～70 | |
8 | Dimension 尺寸 | mm | Φ12*H5.5 | See appearance drawing 请参照外观尺寸图 |
9 | Weight 重量 | g | 1.5 | |
10 | Environmental Protection Regulation | RoHS |
C、APPEARANCE DRAWING外观尺寸图
Model NO : cosson-12055T2P40A
Unit:mm TOL：±0.2
D、FREQUENCY CHARACTERISTICS 频率响应图
E、Electrical And Acoustical Measuring Condition电气和声学测量条件
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Foshan cosson Technology Co. Ltd is a professional R & D, production, sales of various types of electroacoustic components with their own brand (KS) self-operated import and export enterprises. Major production and marketing: buzzer | ultrasonic sensor ultrasonic probe | atomization | sensing pills | SMD buzzer | piezoelectric buzzer | magnetic buzzer | active buzzer |passive buzzer mechanical buzzer | ultrasonic piezoelectric ceramic chip | ultrasonic atomization piece | microporous atomization piece |ultrasonic speaker | ultrasonic transducer ect electro-acoustic components .
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