Datasheet

MAX9715
2.8W, Low-EMI, Stereo, Filterless Class D
Audio Amplifier
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= PV
DD
= 5.0V, GND = PGND = 0V, V
SHDN
= V
DD
, C
BIAS
= 1μF, speaker impedance = 8Ω in series with 68μH connected between
OUT_+ and OUT_-, GAIN = +10.5dB, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
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.
V
DD
, PV
DD
, to GND ...............................................................+6V
GND to PGND .......................................................-0.3V to +0.3V
Any Other Pin to PGND ............................. -0.3V to (V
DD
+ 0.3V)
Duration of OUT__ Short Circuit to PGND or PV
DD
....Continuous
Duration of OUT_+ Short Circuit between OUT_- ......Continuous
Continuous Current Into/Out of (PV
DD
, OUT__, PGND)........1.7A
Continuous Input Current (All Other Pins) ....................... ±20mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TQFN-EP (derate 20.8mW/°C above +70°C)..1666mW
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
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
GENERAL
Supply Voltage Range V
DD
Inferred from PSRR test 4.5 5.5 V
Quiescent Current I
DD
No load 12.8 16 mA
Shutdown Supply Current I
SHDN
V
SHDN
= 0V 0.1 2 μA
Input Resistance R
IN
6.5 10 13.5 kΩ
Turn-On Time t
ON
25 ms
BIAS Voltage V
BIAS
1.8 V
CLASS D SPEAKER AMPLIFIERS
T
A
= +25°C 12.6 45
Output Offset Voltage V
OS
T
A
= T
MIN
to T
MAX
70
mV
GAIN = 0 10.5
Maximum Speaker Amplifier Gain
(Note 3)
A
V
GAIN = 1 9.0
dB
PV
DD
or V
DD
= 4.5V to
5.5V
52.4 75
f = 1kHz, 100mV
P-P
71
Power-Supply Rejection Ratio PSRR V
IN_
= 0V
f = 20kHz, 100mV
P-P
60
dB
R
L
= 8Ω 1.4
THD+N = 1%
R
L
= 4Ω 2.3
R
L
= 8Ω 1.7
Output Power P
OUT
THD+N = 10%
R
L
= 4Ω 2.8
W
R
L
= 8Ω, P
OUT
= 1.2W 0.06
Total Harmonic Distortion Plus
Noise
THD+N f = 1kHz
R
L
= 4Ω, P
OUT
= 2W 0.07
%
P
OUT
= 1W, BW = 22Hz to 22kHz 89
Signal-to-Noise Ratio SNR
P
OUT
= 1W, A-weighted 93
dB
Maximum Capacitive Load C
L_MAX
200 pF
Switching Frequency f
SW
Average frequency in spread-spectrum
operation
1.00 1.22 1.40 MHz