Recommended Circuit For Piezoelectric Buzzer Connection - Epson Buzzer S1C31D51 Manual

Table C.1.2 Recommended resistance for electromagnetic buzzer made by TDK
BZ1 Type
SD160709
SDR08540M3-01
SD160701
SD1614T5-A1
C.2

Recommended circuit for Piezoelectric buzzer connection

Figure C.2.1 shows the recommended circuit when connecting the piezoelectric buzzer. Select the resistance R5
to R7 in Fig C.2.1 so that they are optimized for the piezoelectric buzzer to be connected. Table C.2.1 shows the
recommended resistance values for supply voltage and target current. (In selecting the MOSFET for Q4, Note
that supplied voltage (VDD2) does not exceed the withstand voltage value of the MOSFET.)
TOUT00
S1C31D51
TOUT01
Table C.1.1 Recommended resistance for supplied power and target current
Target
VDD2 (V)
Current(mA)
15 30
15 20
15 10
15 5
12 30
12 20
12 10
12 5
9
Power supply DC Resistance
(VDD1 (V)) (Ohm)
3
5
3
5
3
5
33kΩ
33kΩ
Fig C.1.1 Recommended circuit for piezoelectric buzzer
R5/R6 R7
(Ohm) (Ohm)
560 220
820 220
1.8 k 220
3.3 k 220
470 180
680 180
1.5 k 180
2.7 k 180
Seiko Epson Corporation
Io-p(max)
(mA)
70 40
70 70
16 85
16 85
50 60
70 80
R5
R7
Q4A
VDD2
R6
Q4B
VDD2 (V)
Current(mA)
5
5
5
5
3
3
3
3
Resistance
R1/R2/R3/R4(k Ohm)
4.7
2.2
6.8
13
2.7
4.7
BZ2
Target R5/R6
(Ohm)
30 180
20 270
10 560
5 1.0 k
30 100
20 150
10 330
5 560
S5U1C31D51T2 Manual
R7
(Ohm)
100
100
100
100
47
47
47
47
(Rev.1.0)