PAM890418VPP OUTPUT PIEZO SOUNDER DRIVERDescriptionPin Assignments The PAM8904 is a piezo sounder driver with integrated charge pump (Top View) boost converter. The PAM8904 is capable of driving a ceramic/piezo sounder with 24VPP from a 5.5V power supply. The charge pump can NC VIN CP2 VOUT Pin 1 operate in either a 1x, 2x or 3x mode. E N N 1 C The boost converter operates at a fixed frequency of 1.0MHz and E C N provides a 12V output with a minimum number of external P 2 1 D C components. The PAM8904 can drive up to 15nF loading. Diodes IN N 2 Incorporated’s unique drive technology provides a small inrush NC V O 1 current, low EMI and high efficiency. PAM8904 includes built-in automatic shutdown and wake up that CN1 GND VO2 NC guarantees longer battery life. PAM8904 features thermal shutdown, U-QFN3030-16 (Type B) over current protection, over voltage protection and under voltage (Top View) lock-out.
VIN CP2 VOUT The PAM8904 is available in a 16-pin U-QFN3030-16 (Type B)
Pin 1 package, or 12-pin U-QFN3030-12 (Type A) package.
E C Features N P 1 1
E C Supply Voltage Range from 2.3V to 5.5V
N N 2 2
18V PP Output from a 3V Supply
D IN V O Integrated Boost Converter Generates up to 12V Supply
1 Input Signal 20Hz to 300kHz
No Voltage Cross Output at Shutdown Mode CN1 GND VO2 Low Current Consumption U-QFN3030-12 (Type A) Automatic Standby and Wake-up Control Available in Space Saving Packages 16 Pin U-QFN3030-16 Applications (Type B) or 12 Pin U-QFN3030-12 (Type A) Package Health Care Systems Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Alarm Clocks Halogen and Antimony Free. “Green” Device (Note 3) Security Devices An Automotive-Compliant Part is Available Under Separate Home Appliances Datasheet (PAM8904Q) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen and Antimony free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.