MAX9713ETJ+ Maxim Integrated Products, MAX9713ETJ+ Datasheet - Page 9

• Manufacturer Part Number: MAX9713ETJ+
• Description: IC AMP AUDIO PWR 8W MONO 32TQFN
• Manufacturer: Maxim Integrated Products
• Type: Class Dr

Specifications of MAX9713ETJ+

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 8W x 1 @ 16 Ohm
• Voltage - Supply: 10 V ~ 25 V
• Features: Depop, Differential Inputs, Mute, Short-Circuit and Thermal Protection, Shutdown
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Product: Class-D
• Output Power: 6 W
• Common Mode Rejection Ratio (min): 60 dB
• Thd Plus Noise: 0.07 %
• Operating Supply Voltage: 10 V to 25 V
• Supply Current: 10 mA
• Maximum Power Dissipation: 1702 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Input Signal Type: Differential
• Minimum Operating Temperature: - 40 C
• Supply Voltage (max): 25 V
• Supply Voltage (min): 10 V
• Amplifier Class: D
• No. Of Channels: 1
• Supply Voltage Range: 10V To 25V
• Load Impedance: 8ohm
• Operating Temperature Range: -40°C To +85°C
• Amplifier Case Style: TQFN
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 2. SSM Radiated Emissions
or power-up, the input amplifiers are muted and an
internal loop sets the modulator bias voltages to the
correct levels, preventing clicks and pops when the H-
bridge is subsequently enabled. Following startup, a
soft-start function gradually un-mutes the input ampli-
fiers. The value of the soft-start capacitor has an impact
on the click/pop levels. For optimum performance, C
should be at least 0.18µF.
The MAX9713/MAX9714 feature a clickless/popless
mute mode. When the device is muted, the outputs
stop switching, muting the speaker. Mute only affects
the output state, and does not shut down the device. To
mute the MAX9713/MAX9714, drive SS to GND by
Figure 3. MAX9714 Efficiency vs. Class AB Efficiency
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs. OUTPUT POWER
MAX9714
_______________________________________________________________________________________
OUTPUT POWER (W)
2
CLASS AB
4
V
f = 1kHz
R
Mute Function
DD
L
6W, Filterless, Spread-Spectrum
= 16Ω
= 15V
Mono/Stereo Class D Amplifiers
6
SS
using a MOSFET pulldown (Figure 4). Driving SS to
GND during the power-up/down or shutdown/turn-on
cycle optimizes click-and-pop suppression.
Traditional Class D amplifiers require an output filter to
recover the audio signal from the amplifier’s PWM out-
put. The filters add cost, increase the solution size of
the amplifier, and can decrease efficiency. The tradi-
tional PWM scheme uses large differential output
swings (2
currents. Any parasitic resistance in the filter compo-
nents results in a loss of power, lowering the efficiency.
The MAX9713/MAX9714 do not require an output filter.
The devices rely on the inherent inductance of the
speaker coil and the natural filtering of both the speak-
er and the human ear to recover the audio component
of the square-wave output. Eliminating the output filter
results in a smaller, less costly, more efficient solution.
Because the frequency of the MAX9713/MAX9714 out-
put is well beyond the bandwidth of most speakers,
voice coil movement due to the square-wave frequency
Figure 4. MAX9713/MAX9714 Mute Circuit
MUTE SIGNAL
✕
V
DD
GPIO
Applications Information
peak-to-peak) and causes large ripple
0.18µF
Filterless Operation
SS
MAX9713/
MAX9714
9