DA6240.001
20 November 2006
BLOCK & APPLICATION DIAGRAM
0.1uF
0.1uF
CP1
CN1
CP2
CN2
VIN (3V)
VOUT
1x/2x/3x Charge Pump
0.1uF
0.1uF
Oscillator
1MHz
Short Circuit
Protection
EN1
EN2
Control
Logic
DIN
VO1
PIEZO SOUNDER
VO2
GND
Figure 1: Charge Pump + Single End Piezo Driver (max 9Vpp)
0.1uF
0.1uF
CP1
CN1
CP2
CN2
VIN (3V)
VOUT
1x/2x/3x Charge Pump
0.1uF
0.1uF
Oscillator
1MHz
Short Circuit
EN1
EN2
Control
Logic
Protection
DIN
PIEZO SOUNDER
VO1
VO2
GND
Figure 2: Charge Pump + Differential Piezo Driver (max 18Vpp)
Table 1 Charge Pump boosting mode selection
DIN
EN1
EN2
Charge Pump
0
1
1
1
1
-
-
OFF
0
0
1
1
0
1
0
1
OFF
1x Mode (VIN)
2x Mode (2xVIN)
3x Mode (3xVIN)
Note: Pulsed signal at digital input DIN is taken as “1” if pulse low time is less than 10 ms!
2 (10)
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