14V_P-P, Class G Ceramic Speaker Driver

 

Part Number	Replacement	Explanation

Description

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The MAX9788 features a mono Class G power amplifier with an integrated inverting charge-pump power supply specifically designed to drive the high capacitance of a ceramic loudspeaker. The charge pump can supply greater than 700mA of peak output current at 5.5VDC, guaranteeing an output of 14V_P-P.

The MAX9788 maximizes battery life by offering high-performance efficiency. Maxim's proprietary Class G output stage provides efficiency levels greater than Class AB devices without the EMI penalties commonly associated with Class D amplifiers.

The MAX9788 is ideally suited to deliver the high output-voltage swing required to drive ceramic/piezoelectric speakers.

The device utilizes fully differential inputs and outputs, comprehensive click-and-pop suppression, shutdown control, and soft-start circuitry. The MAX9788 is fully specified over the -40°C to +85°C extended temperature range and is available in small lead-free 28-pin TQFN (4mm x 4mm) or 20-bump WLP (2mm x 2.5mm) packages.

MAX9788: Simplified Block Diagram Enlarge+

Key Features

• Integrated Charge-Pump Power Supply—No Inductor Required
• 14V_P-P Voltage Swing into Piezoelectric Speaker
• 2.7V to 5.5V Single-Supply Operation
• Clickless/Popless Operation
• Small Thermally Efficient Packages
  • 4mm x 4mm 28-Pin TQFN
  • 2mm x 2.5mm 20-Bump WLP

Applications/Uses

• Cellular Phones
• Handheld Gaming Consoles
• MP3 Players
• Notebook Computers
• Personal Media Players
• Smartphones