The AD62550A is a single‑chip Class‑D audio power amplifier that supports USB 1.1/2.0 full‑speed and I²S interfaces. It offers high efficiency (80% at 8 Ω load), built‑in 5 V‑to‑3.3 V regulation, anti‑pop design, and protection features such as over‑temperature and short‑circuit detection.
The document provides a functional block diagram, a complete pin‑assignment table, absolute maximum ratings, and recommended operating conditions, including supply voltage ranges, temperature limits, and input voltage specifications.
| USB compliance | USB 1.1 and USB 2.0 full speed |
|---|---|
| Sampling frequency | 48 kHz |
| PSNR / DR | 80 dB PSNR, 78 dB DR |
| Regulator input voltage (VDD) | 4.5 V – 5.5 V |
| Driver stage supply (VDDL) | 3.0 V – 5.0 V |
| Storage temperature range | -65 °C – 150 °C |
| Input voltage range | -0.3 V – 3.6 V |
It complies with USB Specification v1.1 and USB 2.0 full‑speed.
The recommended VDD supply voltage is 4.5 V to 5.5 V.
The AD62550A operates at a sampling frequency of 48 kHz.