Part # MAX9705 datasheet

Part Manufacturer: Maxim


Part Description: MAX9705 DS

Part Details:

19-3405; Rev 1; 6/06 EVALUATION KIT AVAILABLE 2.3W, Ultra-Low-EMI, Filterless, Class D Audio Amplifier MAX9705 General Description Features The MAX9705 3rd-generation, ultra-low EMI, mono, Class Filterless Amplifier Passes FCC-Radiated D audio power amplifier provides Class AB performance Emissions Standards with 24in of Cable with Class D efficiency. The MAX9705 delivers 2.3W into Unique Spread-Spectrum Mode and Active a 4 load and offers efficiencies above 85%. Active Emissions Limiting (AEL) Achieves Better than emissions limiting (AEL) circuitry greatly reduces EMI by 20dB Margin Under FCC Limits actively controlling the output FET gate transitions under Zero Dead Time (ZDT) H-Bridge Maintains State- all possible transient output-voltage conditions. AEL pre- of-the-Art Efficiency and THD+N vents high-frequency emissions resulting from conven- Simple Master-Slave Setup for Stereo Operation tional Class D free-wheeling behavior in the presence of Up to 90% Efficiency an inductive load. Zero dead time (ZDT) technology 2.3W into 4 (1% THD+N) maintains state-of-the-art efficiency and THD+N perfor-mance by allowing the output FETs to switch simultane- Low 0.02% THD+N (POUT = 1W, VDD = 5.0V) ously without cross-conduction. A patented spread- High PSRR (75dB at 217Hz) spectrum modulation scheme eliminates the need for out- Integrated Click-and-Pop Suppression put filtering found in traditional Class D devices. These Low Quiescent Current (5.4mA) design concepts reduce an application s component Low-Power Shutdown Mode (0.3µA) count and extend battery life. Short-Circuit and Thermal-Overload Protection The MAX9705 offers two modulation schemes: a fixed- Available in Thermally Efficient, Space-Saving frequency (FFM) mode and a spread-spectrum (SSM) Packages mode that further reduces EMI-radiated emissions due to 10-Pin TDFN (3mm x 3mm x 0.8mm) the modulation frequency. The MAX9705 oscillator can 10-Pin µMAX be synchronized to an external clock through the SYNC 12-Bump UCSP (1.5mm x 2mm x 0.6mm) input, allowing the switching frequency to be externally Pin-for-Pin Compatible with the MAX9700 and defined. The SYNC input also allows multiple MAX9705s MAX9712 to be cascaded and frequency locked, minimizing inter-ference due to clock intermodulation. The device utilizes

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MAX9705.pdf Datasheet