MAX9703 Datasheet, PDF (1/21 Pages) Maxim Integrated Products – 10W Stereo/15W Mono, Filterless, Spread-Spectrum, Class D Amplifiers

19-3160; Rev 7; 3/06
10W Stereo/15W Mono, Filterless,
Spread-Spectrum, Class D Amplifiers
General Description
The MAX9703/MAX9704 mono/stereo Class D audio
power amplifiers provide Class AB amplifier performance
with Class D efficiency, conserving board space and
eliminating the need for a bulky heatsink. Using a Class
D architecture, these devices deliver up to 15W while
offering up to 78% efficiency. Proprietary and patent-pro-
tected modulation and switching schemes render the tra-
ditional Class D output filter unnecessary.
The MAX9703/MAX9704 offer two modulation schemes:
a fixed-frequency mode (FFM), and a spread-spectrum
mode (SSM) that reduces EMI-radiated emissions due
to the modulation frequency. The device utilizes a fully
differential architecture, a full bridged output, and com-
prehensive click-and-pop suppression.
The MAX9703/MAX9704 feature high 80dB PSRR, low
0.07% THD+N, and SNR in excess of 95dB. Short-cir-
cuit and thermal-overload protection prevent the
devices from being damaged during a fault condition.
The MAX9703 is available in a 32-pin TQFN (5mm x
5mm x 0.8mm) package. The MAX9704 is available in a
32-pin TQFN (7mm x 7mm x 0.8mm) package. Both
devices are specified over the extended -40°C to
+85°C temperature range.
Applications
LCD TVs
LCD Monitors
Desktop PCs
Hands-Free Car
Phone Adaptors
Automotive
LCD Projectors
Features
♦ Filterless Class D Amplifier
♦ Unique Spread-Spectrum Mode Offers 5dB
Emissions Improvement Over Conventional
Methods
♦ Up to 78% Efficient (R_L = 8Ω)
♦ Up to 88% Efficient (R_L = 16Ω)
♦ 15W Continuous Output Power into 8Ω (MAX9703)
♦ 2x10W Continuous Output Power into 8Ω (MAX9704)
♦ Low 0.07% THD+N
♦ High PSRR (80dB at 1kHz)
♦ 10V to 25V Single-Supply Operation
♦ Differential Inputs Minimize Common-Mode Noise
♦ Pin-Selectable Gain Reduces Component Count
♦ Industry-Leading Click-and-Pop Suppression
♦ Low Quiescent Current (24mA)
♦ Low-Power Shutdown Mode (0.2µA)
♦ Short-Circuit and Thermal-Overload Protection
♦ Available in Thermally Efficient, Space-Saving
Packages
32-Pin TQFN (5mm x 5mm x 0.8mm)–MAX9703
32-Pin TQFN (7mm x 7mm x 0.8mm)–MAX9704
Ordering Information
PART
TEMP RANGE
MAX9703ETJ+ -40^oC to +85^oC
MAX9704ETJ+ -40^oC to +85^oC
*EP = Exposed paddle.
+Denotes lead-free package.
PIN-PACKAGE
32 TQFN-EP*
32 TQFN-EP*
AMP
Mono
Stereo
Block Diagrams
0.47µF
IN+
MAX9703
OUT+
0.47µF
H-BRIDGE
IN-
OUT-
0.47µF
INL+
0.47µF
INL-
MAX9704
H-BRIDGE
OUTL+
OUTL-
0.47µF
INR+
0.47µF
INR-
H-BRIDGE
OUTR+
OUTR-
Pin Configurations appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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.