MAX9703/MAX9704 19-3160 Rev 7 3/06 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 power amplifiers provide Class AB amplifier performance Unique Spread-Spectrum Mode Offers 5dB with Class D efficiency, conserving board space and Emissions Improvement Over Conventional eliminating the need for a bulky heatsink. Using a Class Methods D architecture, these devices deliver up to 15W while Up to 78% Efficient (R = 8 ) L offering up to 78% efficiency. Proprietary and patent-pro- Up to 88% Efficient (R = 16 ) L tected modulation and switching schemes render the tra- 15W Continuous Output Power into 8 (MAX9703) ditional Class D output filter unnecessary. 2x10W Continuous Output Power into 8 (MAX9704) The MAX9703/MAX9704 offer two modulation schemes: a fixed-frequency mode (FFM), and a spread-spectrum Low 0.07% THD+N mode (SSM) that reduces EMI-radiated emissions due High PSRR (80dB at 1kHz) to the modulation frequency. The device utilizes a fully 10V to 25V Single-Supply Operation differential architecture, a full bridged output, and com- Differential Inputs Minimize Common-Mode Noise prehensive click-and-pop suppression. Pin-Selectable Gain Reduces Component Count The MAX9703/MAX9704 feature high 80dB PSRR, low Industry-Leading Click-and-Pop Suppression 0.07% THD+N, and SNR in excess of 95dB. Short-cir- cuit and thermal-overload protection prevent the Low Quiescent Current (24mA) devices from being damaged during a fault condition. Low-Power Shutdown Mode (0.2A) The MAX9703 is available in a 32-pin TQFN (5mm x Short-Circuit and Thermal-Overload Protection 5mm x 0.8mm) package. The MAX9704 is available in a Available in Thermally Efficient, Space-Saving 32-pin TQFN (7mm x 7mm x 0.8mm) package. Both Packages devices are specified over the extended -40C to 32-Pin TQFN (5mm x 5mm x 0.8mm)MAX9703 +85C temperature range. 32-Pin TQFN (7mm x 7mm x 0.8mm)MAX9704 Applications Ordering Information LCD TVs Hands-Free Car Phone Adaptors LCD Monitors PIN-PACKAGE PART TEMP RANGE AMP Automotive o o Desktop PCs 32 TQFN-EP* MAX9703ETJ+ -40 C to +85 C Mono o o 32 TQFN-EP* LCD Projectors MAX9704ETJ+ -40 C to +85 C Stereo *EP = Exposed paddle. +Denotes lead-free package. Block Diagrams 0.47F MAX9704 INL+ OUTL+ H-BRIDGE 0.47F MAX9703 INL- OUTL- 0.47F IN+ OUT+ H-BRIDGE 0.47F 0.47F OUT- IN- INR+ OUTR+ H-BRIDGE 0.47F INR- 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 Maxims website at www.maxim-ic.com.10W Stereo/15W Mono, Filterless, Spread-Spectrum, Class D Amplifiers ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) 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 GND.............................................-0.3V to +12V above +70C)..........................................................2162.2mW Duration of OUTR /OUTL Multilayer Board: Short Circuit to GND, 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, GND = 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 GND (f = 660kHz), R connected between OUTL+ and OUTL- and OUTR+ and OUTR-, T = T to T , unless otherwise noted. S L A MIN MAX 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 = GND 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 2 MAX9703/MAX9704