Acer Aspire 8940G Acer Aspire 8940 Service Guide - Page 38

Audio Amplifier Item Model Package Features Subwoofer Speaker Item Vendor and Model Package Features Power supply Front Speaker Item Vendor and Model Package Weight Power supply Center Speaker Item Vendor and Model Package Weight 28 Specification Panasonic 12947A 48 pins QFP • Microsoft Windows 7® Compliant • High +90dB PSRR, Low -80dB THD+N • Class AB 2.2W (max.) Stereo BTL Speaker Amplifier • Built-in direct drive headphone amplifier within charge pump • AGC adjusted circuit function implement • STBY function support on speaker and headphone (countermeasure pop noise) • RF noise prevention • Built-in over current protection • External adjustable speaker and headphone amplifier gain Specification Maxim MAX9737 24pins TQFN • Spread-spectrum modulation enable for low EMI solution • High PSRR 80dB • Up to 88% efficiency eliminate heatsink • Thermal and Output current protection • Shut-down mode current