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NJU72501 Series
Piezo-sounder Driver with Multi-mode charge pump

Download Datasheet

  • Description

    The NJU72501 is a switching driver with multi mode charge pumpfor piezo-sounder. It can drive outputs up to 18Vpp from 3V supply.For adjusting the piezoelectric sounder sound volume, the chargepump can operate in either of a 1x, 2x or 3x mode.Because NJU72501 has the shutdown function, it is suitable forthe battery application.


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  • Spec
    Supply Voltage 2.3V to 5V
    Channel BTL 1ch.
    Input Signal PWM/PDM
    Output Voltage / Vom Typ. 18Vpp
    Output Voltage / V+ 3V
    Output Voltage / CL 15nF
    Stand-by Yes
    Mute Yes
    Operating Current Consumption current ((Active) IDS=0.3mA typ. (VIN=3V, DIN=4kHz, CPIEZO=15nF, 1x Mode)
    Wide Operating Temperature -40°C to 85°C
    Junction Temp. 125°C
    Package EQFN12-JE,EQFN16-G2,SSOP14
    Features Built in Charge Pump
    Adjust Output Voltage
    Note 1 Multi-Mode Charge Pump (1x/2x/3x)
    Note 2 Consumption current ((Shutdown) IDS=1µA max. (VIN=3V , DIN=0V))

    Protections / Functions

    Stand-by Mute Fine Tune Sensitivity
  • Technical
  • Quality &
    • Refer to the datasheets for the details on the product.
    • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

Download Datasheet

Functional Description

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Category:Audio Amplifiers

Sub Ctegory Class D Amp.
Channel(ch) 1
Supply Voltage
Supply Voltage
Output Voltage vom(Vrms) 18Vpp