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NJU72501 - Piezo-sounder Driver

Description

for piezo-sounder.

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

For adjusting the piezoelectric sounder sound volume, the charge pump can operate in either of a 1x, 2x or 3x mode.

Features

  • Operating Voltage : 2.3 to 5.0V(1x/ 2x Mode), 2.3 to 3.4V(3x Mode).
  • Consumption current (Active) : IDS=0.3mA typ. (VIN=3V, DIN=4kHz, CPIEZO=15nF, 1x Mode) (Shutdown): IDS=1uA max. (VIN=3V , DIN=0V).
  • Multi-Mode Charge Pump (1x/2x/3x).
  • Input Signal Detector & Shutdown Control.
  • Output Short-circuit Protection Circuit.
  • C-MOS Technology.
  • Package Outline : EQFN12-JE, EQFN16-G2.
  • Direct replacement to MAS6240.
  • BLOCK.

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Full PDF Text Transcription

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NJU72501 Piezo-sounder Driver with Multi-mode charge pump ■GENERAL DESCRIPTION The NJU72501 is a switching driver with multi mode charge pump for piezo-sounder. It can drive outputs up to 18Vpp from 3V supply. For adjusting the piezoelectric sounder sound volume, the charge pump can operate in either of a 1x, 2x or 3x mode. Because NJU72501 has the shutdown function, it is suitable for the battery application. ■PACKAGE OUTLINE NJU72501MJE NJU72501MG2 ■APPLICATION Healthcare, Wrist Watches, Alarm Clocks, Handheld GPS devices, PDAs ■FEATURES Operating Voltage : 2.3 to 5.0V(1x/ 2x Mode), 2.3 to 3.4V(3x Mode) Consumption current (Active) : IDS=0.3mA typ. (VIN=3V, DIN=4kHz, CPIEZO=15nF, 1x Mode) (Shutdown): IDS=1uA max.
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