MAX9709 Maxim Integrated Products, MAX9709 Datasheet

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MAX9709

Manufacturer Part Number
MAX9709
Description
25W/50W Filterless Spread-Spectrum Stereo/Mono Class D Amplifier
Manufacturer
Maxim Integrated Products
Datasheet

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The MAX9709 stereo/mono, Class D audio power amplifi-
er delivers up to 2 x 25W into an 8Ω stereo mode and
1 x 50W into a 4Ω load in mono mode while offering up to
87% efficiency. The MAX9709 provides Class AB amplifi-
er performance with the benefits of Class D efficiency,
eliminating the need for a bulky heatsink and conserving
power. The MAX9709 operates from a single +10V to
+22V supply, driving the load in a BTL configuration.
The MAX9709 offers two modulation schemes: a fixed-fre-
quency modulation (FFM) mode, and a spread-spectrum
modulation (SSM) mode that reduces EMI-radiated emis-
sions. The MAX9709 can be synchronized to an external
clock from 600kHz to 1.2MHz. A synchronized output
allows multiple units to be cascaded in the system.
Features include fully differential inputs, comprehensive
click-and-pop suppression, and four selectable-gain set-
tings (22dB, 25dB, 29.5dB, and 36dB). A pin-program-
mable thermal flag provides seven different thermal
warning thresholds. Short-circuit and thermal-overload
protection prevent the device from being damaged
during a fault condition.
The MAX9709 is available in 56-pin TQFN (8mm x 8mm
x 0.8mm) and 64-pin TQFP (10mm x 10mm x 1.4mm)
packages, and is specified over the extended
-40°C to +85°C temperature range.
19-3769; Rev 0; 9/05
Pin Configurations appear at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
CHANNEL
CHANNEL
TH0, TH1,
FS1, FS2
G1, G2
MONO
SYNC
RIGHT
LCD TVs
Automotive
LEFT
TH2
2
CONTROL
________________________________________________________________ Maxim Integrated Products
GAIN
2
25W/50W, Filterless, Spread-Spectrum,
STEREO MODE
General Description
MODULATOR
CLASS D
PDP TVs
PC/HiFi Audio Solutions
3
MAX9709
Applications
PROTECTION
OUTPUT
Stereo/Mono, Class D Amplifier
SYNCOUT
TEMP
TH0, TH1,
FS1, FS2
G1, G2
AUDIO
♦ 2 x 25W Output Power in Stereo Mode
♦ 1 x 50W Output Power in Mono Mode
♦ High Efficiency: Up to 87%
♦ Filterless Class D Amplifier
♦ Unique Patented Spread-Spectrum Mode
♦ Programmable Gain (+22dB, +25dB, +29.5dB,
♦ High PSRR (90dB at 1kHz)
♦ Differential Inputs Suppress Common-Mode
♦ Shutdown and Mute Control
♦ Integrated Click-and-Pop Suppression
♦ Low 0.1% THD+N
♦ Current Limit and Thermal Protection
♦ Programmable Thermal Flag
♦ Clock Synchronization Input and Output
♦ Available in Thermally Efficient, Space-Saving
INPUT
+Denotes lead-free package.
*Future product—Contact factory for availability.
**EP = Exposed paddle.
SYNC
MAX9709ETN+
MAX9709ECB+* -40°C to +85°C 64 TQFP-EP**
TH2
V
DIGITAL
MONO
(8Ω, THD = 10%)
(4Ω, THD = 10%)
+36dB)
Noise
Packages: 56-Pin TQFN and 64-Pin TQFP
PART
2
CONTROL
GAIN
Simplified Block Diagram
2
-40°C to +85°C 56 TQFN-EP**
TEMP RANGE PIN-PACKAGE
Ordering Information
MONO MODE
MODULATOR
CLASS D
3
MAX9709
PROTECTION
www.DataSheet4U.com
OUTPUT
Features
SYNCOUT
TEMP
T5688-3
C64E-6
CODE
PKG
1

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