DA6240C.007

17 October, 2016

3 (13)

The voltage ripple at VOUT output is approximately proportional to ratio of piezo load capacitance and charge

pump output capacitor (COUT). Thus the output ripple can be reduced by choosing COUT which is much larger

relative to piezo capacitance value. However the COUT should not be chosen too large since it lengthens output

voltage rise time and increases inrush current drawn from input. For low inrush current the CIN should be made

much larger than the COUT.

Table 2 presents charge pump boosting modes selected by control pins EN1 and EN2.

Table 2. 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: In above table pulsed signal at digital input DIN is taken as “1” if pulse low time is less than 5 ms!

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol

Conditions

Min

Max

Unit

Supply Voltage

VIN

Charge pump in 1x mode.

Charge pump in 2x or 3x mode.

-0.3

-0.3

5.5

4.0

V

Outputs and Flying

Capacitors Pins Voltages

VOUT,

CP2, VO1,

VO2

-0.3

12

V

CP1, CN2,

-0.3

8

V

Voltage Range for Input

Pins

DIN,

EN1, EN2,

CN1

-0.3

VIN + 0.3

V

VOUT Short-Circuit

Duration

Valid for C1 version which has

short circuit limitation.

Indefinite

Storage Temperature

-55

+150

o

C

ESD Rating

Human Body Model (HBM)

±2

kV

Note: Stresses beyond the values listed may cause a permanent damage to the device. The device may not

operate under these conditions, but it will not be destroyed.

RECOMMENDED OPERATING CONDITIONS

All voltages with respect to ground.

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Operating Junction

Temperature

-40

+125

°C

Operating Ambient

Temperature

-40

+27

+85

°C

Operating Supply Voltage

2.2

3.0

3.3

V