PAM8945PJR

PAM8945PJR is a high-efficiency Class-G audio power amplifier with an integrated boost converter. It drives upto 4.0W (10% THD+N) into a 4ohm speaker. With 85% typical efficiency, this device helps to 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. It features a battery tracking AGC function which adjusts the amplifier gain to limit battery current at lower battery voltage. This device features DC input protection and all outputs are fully protected against output-to-output shorts. It is used in applications such as cell phones, PDAs, GPS, portable electronics, and speakers.

• Built-in battery tracking automatic gain control (AGC), efficient Class-G prolongs battery life
• Minimized ON/OFF pop noise, superior low noise, thermal shutdown
• High PSRR, DC input protection, auto-recovery short-circuit protection
• High-efficiency integrated boost converter over 85%
• Supply voltage range from 2.8V to 5.2V, output power is 4W typ at (THD+N=10%, f = 1KHz)
• Total harmonic distortion plus noise is 0.07% typ at (PO=1.0W, RL=8 ohm, f=1KHz)
• Quiescent current is 4mA typ at (VBAT=3.6V), shutdown current is 1μA max (VBAT=2.8V to 5.2V)
• Efficiency is 86% typ at (RL=8 ohm, PO=1W f = 1KHz)
• Signal-to-noise ratio is 95dB typical at (VBAT = 3.6V, AGC = GND, TA = +25°C)
• Operating temperature range from -40°C to +85°C, W-QFN2030-12 package

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Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.