DESCRIPTION

The A2327 is a 2.6W high efficiency filter-free class-D audio power amplifier that requires only three external components.

Features like 88 efficiency, −75dB PSRR, and improved RF-rectification immunity make the A2327 ideal for cellular handsets. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the A2327.

The A2327 is available in MSOP8 SOP8 and DFN8 packages.

FEATURES

 Efficiency With an 8 Ω Speaker:

88 @ 400mW

80 @ 100mW

 3.8mA Quiescent Current

 0.4μ A Shutdown Current

 Optimized PWM Output Stage Eliminates LC

Output Filter

 Internally Generated 250kHz Switching

Frequency Eliminates Capacitor and Resistor

 Improved PSRR (−75 dB) and Wide Supply

Voltage (2.5V to 5.5V) Eliminates Need for a

Voltage Regulator

 Fully Differential Design Reduces RF

Rectification and Eliminates Bypass Capacitor

 Improved CMRR Eliminates Two Input Coupling

Capacitors

 Available in MSOP8 SOP8 and DFN8 p ack ages

APPLICATION

 Mobile phone 、 PDA 、 MID

 MP3/4 、 PMP

 Portable electronic devices