PAM8945PJR

PAM8945 4.0W CLASS-G AUDIO AMPLIFIER WITH INTEGRATED BOOST CONVERTER AND BATTERY TRACKING AGC PROVISIONAL PRODUCT Description Pin Assignments (Top View) The PAM8945 is a high-efficiency Class-G audio power amplifier with an integrated boost converter. It drives up to 4.0W (10% THD+N) into a 4Ω speaker. With 85% typical efficiency, the PAM8945 helps extend battery life when playing audio. The built-in boost converter generates the voltage rail for the output stage. This provides a louder audio output than a stand-alone amplifier connected directly to the battery. It also maintains a consistent loudness, regardless of battery voltage. The PAM8945 features battery tracking AGC function which adjusts the amplifier gain to limit battery current at lower battery voltage. SW 12 11 PVDD 1 10 VBAT OUT+ 2 9 AGC OUT- 3 8 EN PGND 4 7 IN+ 5 5 6 6 AGND IN- 5 The PAM8945 features DC input protection and all outputs are fully protected against output-to-output shorts. The PAM8945 is available in tiny W-QFN2030-12 package. 5 W-QFN2030-12 Features Applications              Built-in Battery Tracking Automatic Gain Control (AGC) High-Efficiency Integrated Boost Converter Over 85% 4.0W into a 4Ω Load at 10% THD 3.2W into a 4Ω Load at 1% THD Operates from 2.8V to 5.2V Efficient Class-G Prolongs Battery Life Minimized ON/OFF Pop Noise Superior Low Noise High PSRR DC Input Protection Auto-Recovery Short-Circuit Protection Thermal Shutdown Available in 2.0mm x 3.0mm 12L W-QFN Package       Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  Halogen and Antimony Free. “Green” Device (Note 3) Notes: BGND Cell Phones PDA GPS Portable Electronics Speakers 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