PAM8904EJER Diodes Incorporated

PAM8904E 18VPP OUTPUT PIEZO SOUNDER DRIVER Description Pin Assignments The PAM8904E is a piezo sounder driver with integrated charge (Top View) pump boost converter. The PAM8904E is capable of driving a ceramic/piezo sounder with 27V from a 4.5V power supply. The PP NC VIN CP2 VOUT Pin 1 charge pump can operate in either 1x, 2x or 3x mode. 16 15 14 13 1 12 NC EN1 The boost converter operates at a fixed frequency of 100kHz and provides a 3X V output with a minimum number of external IN EN2 2 11 CP1 components. The PAM8904E can drive up to 47nF loading. Diodes DIN 3 10 CN2 Incorporateds unique drive technology provides a small inrush NC 4 9 VO1 current, low EMI and high efficiency. 5 8 6 7 CN1 GND VO2 NC The PAM8904E includes built-in automatic shutdown and wake up that guarantees longer battery life. The PAM8904E features thermal U-QFN3030-16 (Type B) shutdown, over current protection, over voltage protection and under (Top View) voltage lock-out. VIN CP2 VOUT The PAM8904E is available in U-QFN3030-16 (Type B), U-QFN3030- Pin 1 12 (Type A) and W-QFN2020-12 (Type US) packages. 12 10 11 Features EN1 1 9 CP1 Supply Voltage Range from 1.5V to 5.5V 8 EN2 2 CN2 18V Output from a 3V Supply PP DIN 3 7 VO1 Integrated Boost Converter Generates up to 13.5V Supply 4 5 6 Input Signal 20Hz to 300kHz CN1 GND VO2 No Voltage Cross Output at Shutdown Mode Low Current Consumption U-QFN3030-12 (Type A)/W-QFN2020-12 (Type US) Automatic Standby and Wake-up Control Available in Space Saving Packages U-QFN3030-16 (Type B), Applications U-QFN3030-12 (Type A) and W-QFN2020-12 (Type US) Health Care Systems Packages Alarm Clocks Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Security Devices Halogen and Antimony Free. Green Device (Note 3) Home Appliances Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See PAM8904E Typical Applications Circuit C1=1F CC22==11uFF C1=1uF CP1 CN1 CP2 CN2 VIN VOUT Vout Charge Pump C C=2=.22.2uFF IN IN Oscillator (1x / 2x / 3x) CC ==22.2.u2FF OOUUTT EN1 Control Short Circuit Logic Protection EN2 DET VO1 DIN Piezo Level shift sounder GND VO2 Pin Descriptions Pin Number U-QFN3030-12 Pin Name I/O/P Function U-QFN3030-16 (Type A)/ (Type B) W-QFN2020-12 (Type US) 1 1 EN1 I Charge pump mode select 1 2 2 EN2 I Charge pump mode select 2 3 3 DIN I Signal Input 4 NC No Connection 5 4 CN1 I Capacitor 1 Negative Terminal 6 5 GND P Ground 7 6 VO2 O Positive Output 8 NC No Connection 9 7 VO1 O Negative Output 10 8 CN2 I Capacitor 2 Negative Terminal 11 9 CP1 I Capacitor 1 Positive Terminal 12 NC No Connection 13 10 VOUT O Boost Output 14 11 CP2 I Capacitor 2 Positive Terminal 15 12 VIN P Power Supply 16 NC No Connection 2 of 10 PAM8904E March 2019 Diodes Incorporated www.diodes.com Document number: DS41667 Rev. 1 - 2 NEW PRODUCT