General description

The SA58672 is a mono, filter-free class-D audio amplifier which is available in a 9 bump WLCSP (Wafer Level Chip-Size Package) and 10-terminal HVSON packages.

The SA58672 features shutdown control. Improved immunity to noise and RF rectification is increased by high PSRR and differential circuit topology. Fast start-up time and very small WLCSP package makes it an ideal choice for both cellular handsets and PDAs.

The SA58672 delivers 1.7 W at 5 V and 800 mW at 3.6 V into 8 Ω. It delivers 3.0 W at 5 V and 1.6 W at 3.6 V into 4 Ω. The maximum power efficiency is excellent at 90 into 8 Ω and 84 to 88 into 4 Ω. The SA58672 provides thermal and short-circuit shutdown protection.

Features

■ Output power

◆ 3.0 W into 4 Ω at 5 V

◆ 1.6 W into 4 Ω at 3.6 V

◆ 1.7 W into 8 Ω at 5 V

◆ 800 mW into 8 Ω at 3.6 V

■ Power supply range: 2.0 V to 5.5 V

■ Shutdown control

■ High SVRR: −77 dB at 217 Hz

■ Fast start-up time: 7.0 ms

■ Low supply current

■ Low shutdown current

■ Short-circuit and thermal protection

■ Space savings with 1.66 mm × 1.71 mm × 0.6 mm 9 bump WLCSP package

■ Low junction to ambient thermal resistance of 100 K/W with adequate heat sinking of

WLCSP

■ Enhanced power dissipation with 3.0 mm × 3.0 mm × 0.85 mm HVSON10 package

Applications

■ Wireless and cellular handsets and PDAs

■ Portable DVD player

■ USB speakers

■ Notebook PC

■ Portable radio and gaming

■ Educational toys