AD2018

The AD2018 is a high-efficiency, filterless 5.2W mono Class-D audio amplifier. Its ultra-low EMI characteristics make it ideal for portable devices with FM tuner functionality. The device's single-ended input architecture and high power supply rejection ratio effectively enhance RF noise rejection. The filterless PWM topology and fixed-gain configuration reduce external component count, PCB area, and system cost while simplifying design. Up to 90% efficiency, fast startup time, and compact package make it well-suited for portable audio products. The device features a shutdown function to extend system standby time. Thermal protection enhances system reliability. Pop-and-click suppression improves the listening experience while simplifying system debugging.

Applications

• Toy speakers
• Amplifiers
• Bluetooth speakers
• Portable consumer electronics

Key features

• Wide supply voltage range: 2.5V to 5.0V
• Low shutdown leakage current: 1.5µA typical
• Output power: 5.2W into 2Ω and 3.2W into 4Ω at THD+N ≤ 10%
• No coupling capacitors, bootstrap capacitors, or snubber networks required
• Excellent pop-and-click suppression
• Thermal shutdown protection
• Switchable Class-AB and Class-D operation modes
• Small form factor package