Analog Signal Input Class D Amplifier, DC-DC Converter for Piezo Speaker

Manufacturer's part number :


Manufacturer New Japan Radio

New Japan Radio

Description :

The NJU8753 is an analog signal input class D power amplifier with DC-DC converter for Piezo speaker. Input part operates on 2.85V(typ) and a built-in DC-DC converter generates variable output voltage(up to 12V) with input voltage(2.6 to 4.2V). Therefore, it drives Piezo speaker with louder sound and high efficiency.

The NJU8753 incorporates BTL amplifier, which eliminate AC coupling capacitors, capable of driving monaural Piezo speaker with simple external LC low-pass filters.

Class D operation achieves lower power operation for Piezo speaker, thus the NJU8753 is suited for batterypowered applications.

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  • Piezo Speaker Driving
  • Output voltage: 8Vrms(Typ.) @VDDO=10.0V
  • 1-channel Analog Signal Input, 1-channel BTL output
  • Standby(Hi-Z),
  • Built-in DC-DC Converter
  • Built-in Low Voltage Detector
  • Built-in Short Protector
  • Operating Voltage:2.6~3.6V(VDD, VREG):2.6~4.2V(VBAT)
  • CMOS Technology
  • Package Outline:QFN28
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Input Signal Analog  

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Channel 1  
Operating Voltage 2.6 to 3.6V  
Standby Function Yes  
Mute Function No  
Attenuator No  
Package Outline QFN-28