Maxim manual MAX9777/MAX9778

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

Typical Operating Characteristics (continued)

(VDD = PVDD = 5V, GND = PGND = 0V, VSHDN = 5V, CBIAS = 1µF, TA = +25°C, unless otherwise noted.)

TOTAL HARMONIC DISTORTION PLUS NOISE	TOTAL HARMONIC DISTORTION PLUS NOISE	TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (SPEAKER MODE)	vs. OUTPUT POWER (SPEAKER MODE)	vs. OUTPUT POWER (SPEAKER MODE)

MAX9777/MAX9778

	100	AV = 4V/V						toc10		100
								MAX9777/78
		RL = 4Ω
	10									10
(%)	1			f = 10kHz					(%)	1
THD+N	0.1		f = 1kHz						THD+N	0.1
	0.01									0.01
			f = 20Hz
	0.001									0.001
	0	0.5	1.0	1.5	2.0	2.5	3.0	3.5
			OUTPUT POWER (W)

	AV = 2V/V			toc11		100
				MAX9777/78
	RL = 8Ω
						10
					(%)	1
		f = 10kHz			THD+N
						0.1
	f = 1kHz
						0.01
	f = 20Hz
0	0.5	1.0	1.5	2.0		0.001

OUTPUT POWER (W)

	AV = 4V/V			toc12
				MAX9777/78
	RL = 8Ω
		f = 10kHz
	f = 1kHz
	f = 20Hz
0	0.5	1.0	1.5	2.0

OUTPUT POWER (W)

OUTPUT POWER vs. AMBIENT TEMPERATURE	OUTPUT POWER vs. AMBIENT TEMPERATURE	OUTPUT POWER vs. AMBIENT TEMPERATURE
(SPEAKER MODE)	(SPEAKER MODE)	(SPEAKER MODE)

	4					toc13		4
		THD+N = 10%
						MAX9777/78
	3							3
(W)							(W)
		THD+N = 1%
POWER							POWER
	2							2
OUTPUT							OUTPUT
	1							1
		f = 1kHz
		RL = 3Ω						0
	0
	-40	-15	10	35	60	85

					MAX9777/78 toc14		2.0
	THD+N = 10%						1.5
						(W)
	THD+N = 1%					POWER	1.0
						OUTPUT
							0.5
	f = 1kHz
	RL = 4Ω
-40	-15	10	35	60	85		0

THD+N = 10%	toc15
	MAX9777/78
THD+N = 1%

f = 1kHz RL = 8Ω

-40 -15 10 35 60 85

AMBIENT TEMPERATURE (°C) AMBIENT TEMPERATURE (°C) AMBIENT TEMPERATURE (°C)

OUTPUT POWER vs. LOAD RESISTANCE

(SPEAKER MODE)

	5				f = 1kHz		toc16
							MAX9777/78
	4		THD+N = 10%
(W)
POWER	3
OUTPUT	2		THD+N = 1%
	1
	0	10	100	1k	10k
	1					100k
			LOAD RESISTANCE (Ω)

POWER DISSIPATION vs. OUTPUT POWER

(SPEAKER MODE)

	1.6					toc17
	1.4					MAX9777/78
(W)	1.2
DISSIPATION	1.0
	0.8
POWER	0.6
	0.4
	0.2				RL = 4Ω
					f = 1kHz
	0	0.5	1.0	1.5	2.0	2.5
	0

OUTPUT POWER (W)

6 _______________________________________________________________________________________