MAX9703/MAX9704 10W Stereo/15W Mono, Filterless, Spread-Spectrum, Class D Amplifiers General Description Features Filterless Class D Amplifier The MAX9703/MAX9704 mono/stereo Class D audio Unique Spread-Spectrum Mode Offers 5dB power amplifiers provide Class AB amplifier performance Emissions Improvement Over Conventional Methods with Class D efficiency, conserving board space and Up to 78% Efficient (R = 8) eliminating the need for a bulky heatsink. Using a Class L D architecture, these devices deliver up to 15W while Up to 88% Efficient (R = 16) L offering up to 78% efficiency. Proprietary and protected 15W Continuous Output Power into 8 (MAX9703) modulation and switching schemes render the traditional 2x10W Continuous Output Power into 8 (MAX9704) Class D output filter unnecessary. Low 0.07% THD+N The MAX9703/MAX9704 offer two modulation schemes: High PSRR (80dB at 1kHz) a fixed-frequency mode (FFM), and a spread-spectrum 10V to 25V Single-Supply Operation mode (SSM) that reduces EMI-radiated emissions due Differential Inputs Minimize Common-Mode Noise to the modulation frequency. The device utilizes a fully Pin-Selectable Gain Reduces Component Count differential architecture, a full bridged output, and compre- Industry-Leading Click-and-Pop Suppression hensive click-and-pop suppression. Low Quiescent Current (24mA) The MAX9703/MAX9704 feature high 80dB PSRR, low Low-Power Shutdown Mode (0.2A) 0.07% THD+N, and SNR in excess of 95dB. Short-circuit and thermal-overload protection prevent the devices from Short-Circuit and Thermal-Overload Protection being damaged during a fault condition. The MAX9703 is Available in Thermally Efficient, Space-Saving available in a 32-pin TQFN (5mm x 5mm x 0.8mm) pack- Packages 32-Pin TQFN (5mm x 5mm x 0.8mm)MAX9703 age. The MAX9704 is available in a 32-pin TQFN (7mm x 32-Pin TQFN (7mm x 7mm x 0.8mm)MAX9704 7mm x 0.8mm) package. Both devices are specified over Ordering Information the extended -40C to +85C temperature range. Applications PART PIN-PACKAGE AMP PKG CODE LCD TVs Hands-Free Car Phone MAX9703ETJ+ 32 TQFN-EP* Mono T3255-4 LCD Monitors Adapters MAX9704ETJ+ 32 TQFN-EP* Stereo T3277-2 Desktop PCs Note: All devices specified for over -40C to +85C operating LCD Projectors temperature range. *EP = Exposed paddle. +Denotes lead-free package. Block Diagrams 0.47F MAX9704 INL+ OUTL+ MAX9703 H-BRIDGE 0.47F INL- OUTL- 0.47F IN+ OUT+ H-BRIDGE 0.47F 0.47F OUT- IN- INR+ OUTR+ H-BRIDGE 0.47F INR- OUTR- Pin Configurations appears at end of data sheet. 19-3160 Rev 8 5/14MAX9703/MAX9704 10W Stereo/15W Mono, Filterless, Spread-Spectrum, Class D Amplifiers Absolute Maximum Ratings (All voltages referenced to PGND.) Continuous Power Dissipation (T = +70C) A V to PGND, AGND............................................................30V Single-Layer Board: DD OUTR , OUTL , C1N.................................-0.3V to (V + 0.3V) MAX9703 32-Pin TQFN (derate 21.3mW/C DD C1P............................................(V - 0.3V) to (CHOLD + 0.3V) above +70C)..........................................................1702.1mW DD CHOLD........................................................(V - 0.3V) to +40V MAX9704 32-Pin TQFN (derate 27mW/C DD All Other Pins to PGND...........................................-0.3V to +12V above +70C)..........................................................2162.2mW Duration of OUTR /OUTL Multilayer Board: Short Circuit to PGND, V ................................................10s MAX9703 32-Pin TQFN (derate 34.5mW/C DD Continuous Input Current (V , PGND) ...............................1.6A above +70C)..........................................................2758.6mW DD Continuous Input Current......................................................0.8A MAX9704 32-Pin TQFN (derate 37mW/C Continuous Input Current (all other pins)..........................20mA above +70C)..........................................................2963.0mW Junction Temperature......................................................+150C Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (V = 15V, AGND = PGND = 0V, SHDN V , A = 16dB, C = C = 0.47F, C = 0.01F, C1 = 100nF, C2 = 1F, FS1 = FS2 DD IH V SS IN REG = PGND (f = 660kHz), R connected between OUTL+ and OUTL- and OUTR+ and OUTR-, T = T to T , unless otherwise S L A MIN MAX noted. Typical values are at T = +25C.) (Notes 1, 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS GENERAL Supply Voltage Range V Inferred from PSRR test 10 25 V DD MAX9703 14 22 Quiescent Current I R = OPEN mA DD L MAX9704 24 34 Shutdown Current I 0.2 1.5 A SHDN C = 470nF 100 SS Turn-On Time t ms ON C = 180nF 50 SS Amplifier Output Resistance in SHDN = PGND 150 330 k Shutdown A = 13dB 35 58 80 V A = 16dB 30 48 65 V Input Impedance R k IN A = 19.1dB 23 39 55 V A = 29.6dB 10 15 22 V G1 = L, G2 = L 29.4 29.6 29.8 G1 = L, G2 = H 18.9 19.1 19.3 Voltage Gain A dB V G1 = H, G2 = L 12.8 13 13.2 G1 = H, G2 = H 15.9 16 16.3 Gain Matching Between channels (MAX9704) 0.5 % Output Offset Voltage V 6 30 mV OS Common-Mode Rejection Ratio CMRR f = 1kHz, input referred 60 dB IN V = 10V to 25V 54 80 DD Power-Supply Rejection Ratio PSRR f = 1kHz 80 dB RIPPLE (Note 3) 200mV ripple P-P f = 20kHz 66 RIPPLE Maxim Integrated 2 www.maximintegrated.com