Datasheet

MAX9759
3.2W, High-Efficiency, Low-EMI,
Filterless, Class D Audio Amplifier
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (V
DD
= 3.3V)
(V
DD
= PV
DD
= SHDN = MUTE = 3.3V, GND = PGND = 0V, SYNC = GND (FFM). Gain = 12dB (G1 = 0, G2 = 1). Speaker load resis-
tor (R
L
) connected between OUT+ and OUT-, unless otherwise noted. R
L
= ∞, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at T
A
= +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Quiescent Current I
DD
6mA
Mute Current I
MUTE
V
MUTE
= 0V 5 A
Shutdown Current I
SHDN
V
SHDN
= 0V 0.1 µA
Common-Mode Rejection Ratio CMRR f = 1kHz, input referred 67 dB
V
DD
= 3.0V to 5.5V 50 72 dB
f
RIPPLE
= 217Hz 79
f
RIPPLE
= 1kHz 81
Power-Supply Rejection Ratio PSRR
200mV
P-P
ripple
f
RIPPLE
= 20kHz 70
dB
R
L
= 3Ω 1.5
R
L
= 4Ω 1.1
THD+N = 1%
R
L
= 8Ω
0.65
R
L
= 3Ω 1.8
R
L
= 4Ω 1.3
Output Power P
OUT
THD+N = 10%
R
L
= 8Ω
0.78
W
R
L
= 3Ω
0.06
R
L
= 4Ω
0.04
Total Harmonic Distortion Plus
Noise
THD+N
f = 1kHz, either
FFM or SSM,
P
OUT
= 500mW
R
L
= 8Ω
0.02
%
FFM 93
BW = 22Hz
to 22kHz
SSM 89
FFM 96
Signal-to-Noise Ratio SNR
P
OUT
= 500mW,
R
L
= 8Ω
A-weighted
SSM 92
dB
Note 1: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 2: Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For R
L
= 4Ω, L = 33µH.
For R
L
= 8Ω, L = 68µH.
Note 3: Inputs AC-coupled to GND.
Note 4: Testing performed with 8Ω resistive load in series with a 68µH inductive load across BTL outputs. Mode transitions are con-
trolled by the SHDN pin.