News Release

New Product
March 15, 2012

New JRC, introduced piezoelectric sounder driver ideal for health care equipment

Tokyo Japan, March 15, 2012- New Japan Radio Co., Ltd.(New JRC) has introduced to the market the NJU72501, piezoelectric sounder driver with charge pump circuit for piezoelectric sounder and piezoelectric buzzer.

General Description

The output of the warning tone sounds and operation of the "sport computer" or "Health Care Equipment" is a piezoelectric buzzer or sounder has been used.
However, in direct drive from the microcomputer was necessary to ensure a sufficient volume to add additional hard drive circuit.
New JRC has developed a driver optimized to solve a problem like this, for driving a piezoelectric buzzer sounder / piezoelectric, the NJU72501.


Volume can be adjusted by up to six levels of built-in charge pump circuit.

The NJU72501 has a built-in charge pump circuit can be driven at up to 18VP-P from a 3V input.
Built-in charge pump circuit is controlled by logic, you can switch between a three-stage booster.(1x, 2x, 3x)
Also, in the case of single-ended output stage if three, the BTL output volume can be adjusted in six steps.

Consumption current is reduced by a shutdown function.

The NJU72501 has the ability to shut down function. This shutdown functions, you can reduce the quiescent current to stop the operation of the internal circuitry of the NJU72501 if there is no signal input, to increase the battery life of the equipment.

Recomended Devices

We also offer evaluation data matching with the NJU72501 made by Murata Manufacturing Co., Ltd., a piezoelectric sounder, and the piezoelectric buzzer.

  • Recomended piezoelectric sounder / piezoelectric buzzer :
    PKLCS1212E2400-R1, PKLCS1212E4001-R1, PKM13EPYH4000-A0


Multi-mode charge pump (1x / 2x / 3x)
Operating voltage V+=2.3V to 5.0V
Shutdown Function
Operating Current Active mode: IDS=0.3mA typ. (V+=3V) / Shutdown mode: IDS=1µA max. (V+=3V)
Package outline EQFN12-JE (3.0×3.0×0.83mm)


  • Healthcare , Wrist Watches , Alarm Clocks , Handheld GPS devices , PDAs


  • Type No.: NJU72501
  • Function: Piezoelectric sounder driver with charge pump circuit
  • Mass production (MP): Already available 100,000pcs./month
  • Engineering sample (ES): Already available

These contents of a release are the information as of an announcement date. Please contact us about the latest information.

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