DA6240C.000

1 November, 2010

2 (11)

BLOCK & APPLICATION DIAGRAM

1x/2x/3x Charge Pump

VOUT

CP1

CN1

VIN (3V)

GND

DIN

Control

Logic

Oscillator

1MHz

0.1uF

0.1uF

0.1uF

EN1

PIEZO SOUNDER

CP2

CN2

0.1uF

EN2

Short Circuit

Protection

VO1

VO2

900k

Pull Down

Resistor

MAS6240C1/C2

Figure 1: C1 or C2 Version Charge Pump + Single End Piezo Driver (max 9Vpp)

1x/2x/3x Charge Pump

VOUT

CP1

CN1

VIN (3V)

GND

DIN

Control

Logic

Oscillator

1MHz

0.1uF

0.1uF

0.1uF

EN1

PIEZO SOUNDER

CP2

CN2

0.1uF

EN2

Short Circuit

Protection

VO1

VO2

900k

Pull Down

Resistor

MAS6240C2

Figure 2: C2 Version Charge Pump + Differential Piezo Driver (max 18Vpp)

Table 1 Charge Pump boosting mode selection

DIN

EN1

EN2

Charge Pump

0

-

-

OFF

1

0

0

OFF

1

0

1

1x Mode (VIN)

1

1

0

2x Mode (2xVIN)

1

1

1

3x Mode (3xVIN)

Note: Pulsed signal at digital input DIN is taken as “1” if pulse low time is less than 5 ms!