AD62550A is a single-chip Class-D audio amplifier with USB/I2S interface. When using the power supplied from the USB port, AD62550A can drive a pair of up to 1W speakers due to the built-in, high efficiency and high performance class D amplifiers.
The AD62550A is a single‑chip Class‑D stereo audio amplifier that can be powered from a USB port or an external 5 V supply. It supports USB 1.1/2.0 full‑speed, I²S input and output at 48 kHz, and includes features such as volume/mute control, anti‑pop design, over‑temperature protection, and short‑circuit detection.
The document lists the 32‑pin LQFP pin assignment, absolute maximum ratings, and recommended operating conditions, including supply voltages, temperature ranges, and performance parameters such as 80 % efficiency at 8 Ω load.
| Total efficiency | 80% at 8 Ω load @ -1 dB 1 kHz |
|---|---|
| Supply voltage (regulator input) | 4.5 V – 5.5 V |
| Driver stage supply voltage | 3.0 V – 5.0 V |
| Operating temperature (ambient) | 0 °C – 70 °C |
| Storage temperature | -65 °C – 150 °C |
| I²S sampling frequency | 48 kHz |
| Crystal frequency | 12 MHz |
| Package | 32‑pin LQFP (Pb free) |
Yes, it supports both bus‑powered and self‑powered operation.
The amplifier achieves 80 % efficiency at an 8 Ω load with a -1 dB 1 kHz sine‑wave input.
The regulator input requires a supply voltage between 4.5 V and 5.5 V.
The I²S interface operates at a sampling frequency of 48 kHz.