Features and Benefits
- 2.7V to 5.5V Operation
- Integrated Charge-Pump Power Supply
- 63% Efficiency (VCC = 5V, POUT = 1W)
- 2.4W Output Power into 8Ω at VCC = 5V
- Clickless/Popless Operation
- Small Thermally Efficient Packages
- 2mm x 2.5mm 20-Bump WLP
- 4mm x 4mm 28-Pin TQFN
The MAX9730 features a mono Class G power amplifier with an integrated inverting charge-pump power supply. The charge pump can supply up to 500mA of peak output current over a 2.7VDC to 5.5VDC supply voltage range, guaranteeing up to 2.4W output power into an 8Ω load. The 2.4W output power allows for transient audio content to remain unclipped as the battery rail collapses over time.
The MAX9730 maximizes battery life by offering high-performance efficiency. Maxim's proprietary output stage provides efficiency levels greater than Class AB devices without the EMI penalties commonly associated with Class D amplifiers. High efficiency allows the MAX9730 to be packaged in a WLP package without derating the output power handling capability.
The device utilizes fully differential inputs and outputs, comprehensive click-and-pop suppression, shutdown control, and soft-start circuitry. The MAX9730 is fully specified over the -40°C to +85°C extended temperature range and is available in ultra-small, lead-free, 20-bump WLP (2mm x 2.5mm) and 28-pin TQFN (4mm x 4mm) packages.
- Cellular Phones
- Handheld Gaming Consoles
- MP3 Players
- Notebook Computers
- Personal Media Players
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The MAX9730 evaluation kit (EV kit) is a fully assembled and tested PCB that uses the MAX9730 Class G power amplifier to drive a bridge-tied-load (BTL) speaker in portable audio applications. Designed to operate from a 2.7V to 5.5VDC power supply, the EV kit accepts a single-ended or differential input signal. The EV kit provides a fully differential output capable of delivering 2.4W into an 8Ω speaker.
Features & Benefits
- 5V Single-Supply Operation
- Fully Differential Output
- Delivers 2.4W into an 8Ω Speaker
- Configurable Switching Frequency
- Evaluates the MAX9730 in a 28-Pin TQFN (4mm x 4mm x 0.8mm) Package
- MAX9730 IC Available in a 20-Bump UCSP (2mm x 2.5mm) Package
- Fully Assembled and Tested
Documentation & Resources
MAX9730 Reliability Data1/12/2023
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.