PA4401: Punk Serial 9, 12V

Features 9V or 12V operation 3V RMS Capability Power-Up and Power-Down “POP” suppression ESD protected outputs 8-Lead SOIC and DFN packages Series operation Only 1 external component required Ron (On resistance): 0.8 ohms Ron Flatness: 0.4 ohms Total Harmonic Distortion: <1% Current drain: <5mA Load: 600 ohms

Applications Portable DVD players Set-top boxes Car Audio High End Audio Televisions Stereo Systems Digital Video Recorders LCD TVs Home Theater systems

• Application Notes
• Block Diagrams
• White Papers
• Evaluation Boards
• Datasheet

General Description

The PA4401 provides click-pop suppression for devices that lack a click-less/pop-less startup or shutdown. The PA4401 is placed between the codec and the output coupling capacitor.
The click-pop noise is generated at the coupling capacitors while the system is starting up as well as shutting down.
The PA4401 controls the ramping of the DC voltage into the coupling capacitors thus reducing the click-pop noise generated during the startup and shutdown.
The start time can be controlled or changed using an external capacitor.
ESD protection circuits are provided at the inputs and outputs of the device.
The PA4401 consumes less than 5mA of current and provides a THD of less than 1% for a load of 600 ohms.
The PA4401 is available in 8L-SOIC and 8L DFN packages.