Mono/Stereo High-Power Class D Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(V
= 20V, V = 5V, AGND = PGND = 0V, V
= V
= V
= 5V, REGEN = MONO = AGND, C1 = 0.1µF, C2 = 1µF,
PVDD
VS
MOD
SHDN
MUTE
R
_ = 20kΩ and R = 20kΩ, R = ∞, AC measurement bandwidth 22Hz to 22kHz, T = T
to T
, unless otherwise noted.
MAX
IN
FB_
L
A
MIN
Typical values are at T = +25°C.) (Notes 4, 5)
A
PARAMETER
SYMBOL
CONDITIONS
= 4W, f = 1kHz,
MIN
TYP
MAX
UNITS
MAX9736A, P
OUT
0.04
0.04
96.5
97
PWM modulation mode, R = 8Ω
L
Total Harmonic Distortion Plus
Noise
THD+N
%
MAX9736B, P
= 2W, f = 1kHz,
MAX9736
OUT
PWM modulation mode, R = 8Ω
L
MAX9736A, P
R = 8Ω
L
= 8W,
= 6W,
OUT
OUT
Signal-to-Noise Ratio
Noise
SNR
A-weighted
dB
MAX9736B, P
R = 8Ω
L
MAX9736A
MAX9736B
120
100
100
88
A-weighted
(Note 9)
V
µV
RMS
N
Crosstalk
Efficiency
L to R, R to L, P
= 1W, f = 1kHz, R = 8Ω
dB
%
OUT
L
η
P
= 8W, MAX9736A, PVDD = 12V, R = 8Ω
OUT L
Peak voltage, 32
samples/second,
A-weighted
Into mute
36
36
Click-and-Pop Level
K
CP
dBV
Out of mute
(Notes 9 and 10)
Switching Frequency
Spread-Spectrum Bandwidth
Thermal Shutdown Level
Thermal Shutdown Hysteresis
Turn-On Time
270
300
4
330
kHz
kHz
°C
160
30
°C
t
110
ms
ON
DIGITAL INTERFACE
Input Voltage High
V
2
V
V
INH
Input Voltage Low
V
0.8
10
INL
Input Voltage Hysteresis
Input Leakage Current
50
mV
µA
Note 4: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 5: Stereo mode (MONO = GND) specified with 8Ω resistive load in series with a 68µH inductive load connected across BTL
outputs. Mono mode (MONO = 5V) specified with a 4Ω resistive load in series with a 33µH inductive load connected
across BTL outputs.
Note 6: Output swing is specified with respect to V
COM.
Note 7: For typical applications, an external 5V supply is not required. Therefore, set REGEN = 5V. If thermal performance is a
concern, set REGEN = 0V and provide an external regulated 5V supply.
Note 8: Output amplifier gain is defined as:
⎛
⎞
| (V
) − (V
) |
OUT_+
OUT_−
20 × log
⎜
⎟
| V
|
⎝
⎠
FB_
Note 9: Amplifier inputs AC-coupled to GND.
Note 10: Specified at room temperature with an 8Ω resistive load in series with a 68µH inductive load connected across BTL outputs.
Mode transitions controlled by SHDN control pin.
4
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