PAMS Technical Documentation
3 - Audio System
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Buzzer driver specifications
Parameter
Variable
Min
Typ
Max
Unit
Output switch resistance Rbuzzo
1.0
2.7
4.5
Ohm
Output peak sink current Iout
VBAT
120
180
350
mA
Output peak sink voltage Uout
VBAT
0.5
1.2
V
Output pwm duty cycle Pdcyc
50
%
Buzzer coil resistance Rload
13
16
19
Ohm
Battery voltage VBAT
Ni or Li battery
3.03
3.6
5.2 (Ni)
4.2 (Li)
V
Reverse diode peak current Iforw
tp = 10 us
0.35
A
Output frequency Fout, GSM system
0.48
2500
7751
Hz
UEM
BUZZPWM
5kOhm
+/- 35%
VBATDriv
BUZZO
12 pF
BUZZER
VSADriv2
1 uF
VBAT
Figure 13. Buzzer driver circuit.
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Содержание 6310I - Cell Phone - GSM
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