4.0W CLASS-G AUDIO AMPLIFIER
PAM8945
4.0W CLASS-G AUDIO AMPLIFIER WITH INTEGRATED BOOST CONVERTER AND BATTERY TRACKING AGC
Description
The PAM8945 i...
Description
PAM8945
4.0W CLASS-G AUDIO AMPLIFIER WITH INTEGRATED BOOST CONVERTER AND BATTERY TRACKING AGC
Description
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.
Pin Assignments
(Top View) BGND SW
PVDD 1
12 11
OUT+ 2
The PAM8945 features battery tracking AGC function which adjusts the amplifier gain to limit battery current at lower battery voltage.
OUT- 3
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.
Features
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. “Gr...
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