Maxim MAX9777, MAX9778 manual Parameter Symbol Conditions MIN TYP MAX Units

Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux

MAX9777/MAX9778

ABSOLUTE MAXIMUM RATINGS

VDD to GND	+6V
PVDD to VDD	±0.3V
PGND to GND	±0.3V
All Other Pins to GND	-0.3V to (VDD + 0.3V)
Continuous Input Current (into any pin except power-supply
and output pins)	±20mA
OUT__ Short Circuit to GND, VDD	10s
Short Circuit Between OUT_+ and OUT_-	Continuous

Continuous Power Dissipation (TA = +70°C)

28-Pin TQFN, Multilayer Board
(derate 34.5mW/°C above +70°C)	..........................2758.6mW
Operating Temperature Range	-40°C to +85°C
Storage Temperature Range	-65°C to +150°C
Junction Temperature	+150°C
Lead Temperature (soldering, 10s)	+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VDD = PVDD = 5.0V, GND = PGND = 0V, VSHDN = 5V, CBIAS = 1µF, RIN = RF = 15kΩ, RL = ∞. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER	SYMBOL	CONDITIONS			MIN	TYP	MAX	UNITS
Supply Voltage Range	VDD/PVDD	Inferred from PSRR test			4.5		5.5	V
Quiescent Supply Current	IDD	BTL mode, HPS = 0V, MAX9777/MAX9778				13	32	mA
(IVDD + IPVDD)
		Single-ended mode, HPS = VDD				7	18
Shutdown Current	ISHDN	SHDN = GND				10	50	µA
Switching Time	tSW	Gain or input switching				10		µs
Turn-On Time	tON	CBIAS = 1µF				300		ms
		CBIAS = 0.1µF				30
Thermal Shutdown Threshold						+160		oC
Thermal Shutdown Hysteresis						15		oC
OUTPUT AMPLIFIERS (SPEAKER MODE, HPS = GND)
Output Offset Voltage	VOS	OUT_+ - OUT_-, AV = 1V/V				±4	±32	mV
Power-Supply Rejection Ratio		VDD = 4.5V to 5.5V			75	100
	PSRR	f = 1kHz, VRIPPLE = 200mVP-P				82		dB
(Note 2)
		f = 20kHz, VRIPPLE = 200mVP-P				70
		fIN = 1kHz,	RL = 8Ω			1.4
Output Power	POUT	THD+N < 1%,	RL = 4Ω			2.6		W
		TA = +25°C	Ω			3
			RL = 3
Total Harmonic Distortion Plus	THD+N	fIN = 1kHz, BW =	POUT = 1W, RL = 8Ω			0.005		%
Noise		22Hz to 22kHz		Ω		0.01
			POUT = 2W, RL = 4
Signal-to-Noise Ratio	SNR	RL = 8Ω, POUT = 1W, BW = 22Hz to 22kHz				95		dB
Slew Rate	SR					1.6		V/µs
Maximum Capacitive Load Drive	CL	No sustained oscillations				1		nF
Crosstalk		fIN = 10kHz				73		dB
Click/Pop Level	KCP	Peak voltage, A-weighted,		Into shutdown		-50		dBV
		32 samples per second
				Out of shutdown		-65
		(Notes 2, 6)

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