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Maxim > Products > Audio  Amplifiers and Comparators 
MAX9730
2.4W, Single-Supply Class G Power Amplifier

Highest Output Power Speaker Amplifier From a Battery


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Description
FULL DATA SHEET (PDF, 304kB)
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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.

Key Features   Applications/Uses
  • 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 = 3.3V
  • Up to 2.4W Instantaneous Output Power into 8Ω
  • Clickless/Popless Operation
  • Small Thermally Efficient Packages
    • 2mm x 2.5mm 20-Bump WLP
    • 4mm x 4mm 28-Pin TQFN

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

    Key Specifications:   Speaker Amplifiers
    Part Number Class Speaker Amp. VCC (min) (V) Speaker Amp. VCC (max) (V) Speaker Amp. ICC (typ) (mA) POUT into 8Ω @ 1% THD+N (W) POUT into 8Ω @ 10% THD+N (W) Output Voltage Swing (Vp-p) Speaker Amp. Half Pwr. THD+N (%) SNR, A-weighted (dB) PSRR (db) Speaker Amp. External Gain Speaker Amp. Fixed Gain (min) (V/V) Speaker Amp. Fixed Gain (max) (V/V) Number of Channels Package RoHS Available Price*
    MAX9730  Boosted/G 2.7 5.5 8 2.4 2.8 20 0.07 95 77 No 4 4 1 THIN QFN/28
    WLP/18     		Yes $0.80 @ 1k
    See All Speaker Amplifiers (29)
    Notes:
    *This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

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    Document Ref.: 19-0701; Rev 3; 2008-02-27
    This page last modified: 2008-02-27




             



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