2 10 W Filterless Class-D Stereo Audio Amplifier Data Sheet SSM3302 load or with 82% efficiency at 10 W into 4 from a 12 V supply, FEATURES and it has an SNR of >98 dB. Filterless stereo Class-D amplifier with - modulation 2 10 W into 4 load and 2 8 W into 8 load at 12 V supply Spread spectrum pulse density modulation (PDM) is used to with <1% total harmonic distortion plus noise (THD + N) provide lower EMI radiated emissions compared with other 91% efficiency at 12 V, 8 W into 8 speaker Class-D architectures. The SSM3302 includes an optional 98 dB signal-to-noise ratio (SNR) modulation select pin (ultralow EMI emission mode) that Single-supply operation from 7 V to 18 V significantly reduces the radiated emissions at the Class-D Flexible gain adjustment pin from 9 dB to 24 dB outputs, particularly above 100 MHz. The SSM3302 can pass Fixed input impedance of 40 k FCC Class-B emissions testing with an unshielded 20 inch cable Mono output mode pin for 1 20 W output power into 2 using common-mode choke-based filtering. 10 A shutdown current The fully differential input of the SSM3302 provides excellent Short-circuit and thermal protection rejection of common-mode noise on the input. The device also Available in a 40-lead, 6 mm 6 mm LFCSP includes a highly flexible gain select pin that only requires one Pop-and-click suppression series resistor to choose a gain between 9 dB and 24 dB, with no User-selectable ultralow EMI emissions mode change to the input impedance. The benefit of this is to improve Thermal warning indicator gain matching between multiple SSM3302 devices within a single Power-on reset application compared with using external resistors to set gain. APPLICATIONS The SSM3302 includes an integrated voltage regulator that Mobile computing generates a 5 V rail. Flat panel televisions The SSM3302 has a micropower shutdown mode with a typical Media docking stations shutdown current of 10 A. Shutdown is enabled by applying a Portable electronics logic low to the SD pin. The device also includes pop-and-click Sound bars suppression circuitry that minimizes voltage glitches at the output GENERAL DESCRIPTION during turn on and turn off, reducing audible noise during activation and deactivation. The SSM3302 is a fully integrated, high efficiency, stereo Class-D audio amplifier. The application circuit requires minimal external Other included features to simplify system level integration of components and operates from a single 7 V to 18 V supply. The the SSM3302 are input low-pass filtering to suppress out-of- device is capable of delivering 2 10 W of continuous output band DAC noise interference to the pulse density modulator, power into a 4 load (or 2 8 W into 8 ) with <1% THD + N fixed input impedance to simplify component selection across from a 12 V supply. In addition, while mono mode is activated, multiple platform production builds, and a thermal warning the user can drive a load as small as 2 up to 20 W continuous indicator pin. output power by stacking the stereo output terminals. The SSM3302 is specified over the commercial temperature The SSM3302 features a high efficiency, low noise modulation range (40C to +85C). It has built-in thermal shutdown and scheme that requires no external LC output filters. This scheme output short-circuit protection. It is available in a halide-free, continues to provide high efficiency even at low output power. 40-lead, 6 mm 6 mm lead frame chip scale package (LFCSP). The SSM3302 operates with 90% efficiency at 7 W into an 8 Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20122013 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com SSM3302 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Analog Supply ............................................................................. 16 Applications ....................................................................................... 1 Gain Selection ............................................................................. 16 General Description ......................................................................... 1 Amplifier Protection .................................................................. 16 Revision History ............................................................................... 2 Pop-and-Click Suppression ...................................................... 16 Functional Block Diagram .............................................................. 3 EMI Noise .................................................................................... 16 Specifications ..................................................................................... 4 Mono Mode ................................................................................. 16 Absolute Maximum Ratings ............................................................ 6 Output Modulation Description .............................................. 17 Thermal Resistance ...................................................................... 6 Layout .......................................................................................... 17 ESD Caution .................................................................................. 6 Input Capacitor Selection .......................................................... 17 Pin Configuration and Function Descriptions ............................. 7 Bootstrap Capacitors.................................................................. 17 Typical Performance Characteristics ............................................. 8 Power Supply Decoupling ......................................................... 18 Typical Application Circuits .......................................................... 14 Outline Dimensions ....................................................................... 19 Applications Information .............................................................. 16 Ordering Guide .......................................................................... 19 Overview ...................................................................................... 16 REVISION HISTORY 5/13Rev. 0 to Rev. A Changed Voltage Rating from 6.3 V to 35 V in Bootstrap Capacitors Section ............................................................................ 17 2/12Revision 0: Initial Version Rev. A Page 2 of 20