DRV632PWR

The DRV632 is a 2VRMS pop-free stereo line driver designed to eliminate output DC-blocking capacitors, reducing component count and cost. It is ideal for single-supply electronics where size and cost are critical design parameters. The DRV632 is designed using DirectPath proprietary technology, capable of driving 2VRMS into a 10kΩ load from a 3.3V supply. The device features differential inputs and uses external gain-setting resistors to support a gain range of ±1V to ±10V, with independently configurable gain per channel. The line outputs feature ±8kV IEC ESD protection, requiring only a simple resistor-capacitor ESD protection network. The DRV632 includes built-in active mute control for pop-free audio on/off control. It also features an external undervoltage detector that mutes the outputs when power is removed, ensuring pop-free shutdown operation. Compared to conventional approaches for generating a 2VRMS output, using the DRV632 in audio products significantly reduces component count. The DRV632 requires neither a supply voltage higher than 3.3V to generate its 5.6Vpp output, nor a split-rail supply. An integrated charge pump generates a negative supply rail, providing a well-regulated pop-free ground-referenced 2VRMS output. The DRV632 is available in a 14-pin TSSOP package.

Applications

• Set-top boxes
• Blu-ray Disc, DVD players
• LCD and PDP televisions
• Mini/micro component stereo systems
• Sound cards
• Laptop computers

Key features

• Stereo DirectPath audio line driver
• 2Vrms into 10kΩ load from 3.3V supply
• Low THD+N < 0.01% at 2Vrms into 10kΩ load
• High SNR > 90dB
• Supports 600Ω output load
• Differential input and single-ended output
• Adjustable gain via external gain-setting resistors
• Low DC offset < 1mV
• Ground-referenced output eliminates DC-blocking capacitors
• Reduced PCB area, lower component cost, improved THD+N performance without low-frequency response degradation caused by output capacitors
• Short-circuit protection
• Transient noise (click and pop) suppression circuit
• External undervoltage mute
• Active mute control for noise-free audio on/off control
• Space-saving TSSOP package