Rainbow Electronics MAX9704 - Manual

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 100dB. 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
Features
♦ Filterless Class D Amplifier
♦ Unique Spread-Spectrum Mode Offers 5dB
Emissions Improvement Over Conventional
Methods
♦ Up to 78% Efficient
♦ 15W Output Power into 8Ω
♦ Up to 20W Peak Power
♦ 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
MAX9703/MAX9704
15W, Filterless, Spread-Spectrum
Mono/Stereo Class D Amplifiers
________________________________________________________________ Maxim Integrated Products 1
19-3160; Rev 1; 3/04
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.
Ordering Information
PART TEMP RANGE PIN-PACKAGE AMP
MAX9703 ETJ -40 o C to +85 o C 32 TQFN-EP* Mono
MAX9704 ETJ -40 o C to +85 o C 32 TQFN-EP* Stereo
*EP = Exposed paddle.
LCD TVs
LCD Monitors
Desktop PCs
LCD Projectors
Hands-Free Car
Phone Adaptors
Automotive
Pin Configurations appear at end of data sheet.
MAX9704
0.47µF
INL+ OUTL+
OUTL- INL-
0.47µF H-BRIDGE
0.47µF
INR+ OUTR+
OUTR- INR-
0.47µF H-BRIDGE
MAX9703
0.47µF
IN+ OUT+
OUT- IN-
0.47µF H-BRIDGE
Block Diagrams