MAX9705

VDD to GND.........................................................................6V
PVDD to PGND .....................................................................6V
GND to PGND ....................................................-0.3V to +0.3V
PVDD to VDD ....................................................-0.3V to +0.3V
All Other Pins to GND..............................-0.3V to (VDD + 0.3V)
Continuous Current Into/Out of PVDD/PGND/OUT_....±600mA
Continuous Input Current (all other pins) ....................±20mA
Duration of OUT_ Short Circuit to GND or PVDD.......Continuous
Duration of Short Circuit Between OUT+ and OUT-..Continuous
Continuous Power Dissipation (TA = +70°C)
10-Pin TDFN (derate 24.4mW/°C above +70°C) ....1951.2mW
10-Pin MAX (derate 5.6mW/oC above +70°C).........444.4mW
12-Bump UCSP (derate 6.1mW/°C above +70°C)........484mW
Junction Temperature....................................................+150°C
Operating Temperature Range ........................-40°C to +85°C
Storage Temperature Range .........................-65°C to +150°C
Lead Temperature (soldering, 10s) ...............................+300°C
Bump Temperature (soldering)
Reflow ...........................................................................+235°C

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.

The MAX9705 3rd-generation, ultra-low EMI, mono, Class D audio power amplifier provides Class AB performance with Class D efficiency. The MAX9705 delivers 2.3W into a 4 load and offers efficiencies above 85%. Active emissions limiting (AEL) circuitry greatly reduces EMI by actively controlling the output FET gate transitions under all possible transient output-voltage conditions. AEL prevents high-frequency emissions resulting from conventional Class D free-wheeling behavior in the presence of an inductive load. Zero dead time (ZDT) technology maintains state-of-the-art efficiency and THD+N performance by allowing the output FETs to switch simultaneously without cross-conduction. A patented spreadspectrum modulation scheme eliminates the need for output filtering found in traditional Class D devices. These design concepts of MAX9705  reduce an application's component count and extend battery life.

The MAX9705 offers two modulation schemes: a fixedfrequency (FFM) mode and a spread-spectrum (SSM) mode that 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 allows multiple MAX9705s to be cascaded and frequency locked, minimizing interference due to clock intermodulation. The device utilizes a fully differential architecture, a full-bridged output, and comprehensive click-and-pop suppression. The gain of the MAX9705 is set internally (MAX9705A: 6dB, MAX9705B: 12dB, MAX9705C: 15.6dB, MAX9705D: 20dB), further reducing external component count.

The MAX9705 is available in 10-pin TDFN (3mm x 3mm x 0.8mm), 10-pin MAX®, and 12-bump UCSP™ (1.5mm x 2mm x 0.6mm) packages. The MAX9705 is specified over the extended -40°C to +85°C temperature range.