DA6241.005

31 January, 2019

1 (9)

MAS6241

Piezo Driver with 3x Charge Pump

• Self-Drive Method

• Differential Output

• Up to 18Vpp Output from 3V

Supply

• High Efficiency

• Solution without Inductors

• Low External Part Count

DESCRIPTION

MAS6241 is a piezo driver device suitable for driving

self-drive type piezoelectric sounder or diaphragm. It

can drive outputs up to 18Vpp from 3V supply. An

internal 3x charge pump generates boosted supply

voltage for piezo driver.

The charge pump and piezo driver are controlled on

and off using enable (EN) input pin.

MAS6241 is an easy and low-cost solution for piezo

driver, since only 4 small value capacitors are needed

in addition to sound element - the use of inductors can

be avoided. The inductorless design also causes

significantly less disturbance to the surrounding circuits

making it an ideal choice for sensitive designs. Its

charge pump switches at 1MHz, allowing to using as

small as 100nF external flying and output capacitors.

The piezo driver has two outputs (VOB, VOS) and one

feedback input (FEED) to drive 3-terminal self-drive

type piezo in bridge tied load (BTL) configuration.

MAS6241 is available in 3x3x0.75 mm size QFN-12

package.

FEATURES

APPLICATIONS

• Self-Drive Method

• Differential Output

• Up to 18Vpp Output from 3V Supply

• Inductorless Low EMI Solution

• 1MHz Switching Frequency

• Low External Part Count

• Thin 3x3x0.75 mm QFN-12 Package

• Piezoelectric Buzzer

• Smoke Alarm

• Alarm Clock

• White Goods

• Portable Device with Sound Feature