Maxim MAX9705 Manuals

The MAX9705 is a 3rd-generation, ultra-low EMI, mono, Class D audio power amplifier that provides Class AB performance with Class D efficiency. It delivers 2.3W into a 4Ω load and offers efficiencies above 85%. The active emissions limiting (AEL) circuitry reduces EMI by controlling the output FET gate transitions under all possible transient output-voltage conditions. The zero dead time (ZDT) technology allows the output FETs to switch simultaneously without cross-conduction, maintaining efficiency and THD+N performance. The patented spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class D devices. These design concepts reduce component count and extend battery life. The MAX9705 offers two modulation schemes: fixed-frequency (FFM) mode and spread-spectrum (SSM) mode, which further reduces EMI-radiated emissions due to the modulation frequency. The MAX9705 oscillator can be synchronized to an external clock through the SYNC input, allowing the switching frequency to be externally defined. The SYNC input also enables cascading and frequency locking of multiple MAX9705s, minimizing interference due to clock intermodulation. The device utilizes a fully differential architecture, a full-bridged output, and comprehensive...

The MAX9705 is a 3rd-generation ultra-low EMI mono Class D audio power amplifier that combines Class AB performance with Class D efficiency. It delivers 2.3W into a 4Ω load with efficiencies above 85%. The MAX9705 actively controls the output FET gate transitions to greatly reduce EMI. It also features zero dead time technology and a patented spread-spectrum modulation scheme to eliminate the need for output filtering. The MAX9705 offers fixed-frequency mode and spread-spectrum mode to further reduce EMI-radiated emissions. It can be synchronized to an external clock and supports cascading multiple MAX9705s.