Audio Amplifier Specification

Audio Amplifier

Item		Specification

Model	Panasonic 12947A
Package	48 pins QFP

Features	• 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

Subwoofer Speaker

Item		Specification

Vendor and Model	Maxim MAX9737

Package	24pins TQFN

Features	• 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 <1uA
	• Click and pop suppression
	• Turn on time < 10ms
	• Support 3W/4ohm power output

Power supply	8~28V

Front Speaker

Item		Specification

Vendor and Model	GMT 1453L
Package	16 pins TQFN

Weight	• Support 2W/4ohm power output
	•	Depop circuitry integrated
	• Stereo bridge-tied load (BTL)
	• Shut-down control available (<1uA)

Power supply	+5V

Center Speaker

Item		Specification

Vendor and Model	GMT 1442

Package	8 pins TDFN

Weight	• Support 2W/4ohm power output
	•	Depop circuitry integrated
	• Stereo bridge-tied load (BTL)
	• Shut-down control available (<1uA))

Chapter 1