PAM8904

Description

The PAM8904 is a piezo sounder driver with integrated charge pump boost converter. The PAM8904 is capable of driving a ceramic/piezo sounder with 24VPP from a 5.5V power supply. The charge pump can operate in a 1x, 2x, or 3x mode.

The boost converter operates at a fixed frequency of 1.0MHz and provides a 12V output with a minimum number of external components. The PAM8904 can drive up to 15nF loading. Diodes Incorporated’s unique drive technology provides a small inrush current, low EMI and high efficiency.

The PAM8904 includes built-in automatic shutdown and wake up that guarantees longer battery life. The PAM8904 features thermal shutdown, overcurrent protection, overvoltage protection and undervoltage lock-out.

The PAM8904 is available in a 16-pin U-QFN3030-16 (Type B) package, a 12-pin U-QFN3030-12 (Type A) package, or a 12-pin UQFN2020-12 (Type UX) package.

Feature(s)

• Supply Voltage Range from 1.8V to 5.5V
• 18V_PP Output from a 3V Supply
• Integrated Boost Converter Generates Up to 12V Supply
• No Voltage Cross Output at Shutdown Mode
• Low Current Consumption
• Automatic Standby and Wake-Up Control
• Available in Space-Saving Packages:
  • 16-Pin U-QFN3030-16 (Type B)
  • 12-Pin U-QFN3030-12 (Type A)
  • 12-Pin U-QFN2020-12 (Type UX)
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• An Automotive-Compliant Part is Available Under Separate Datasheet (PAM8904Q)

Application(s)

• Health care systems
• Alarm clocks
• Security devices
• Home appliances