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2.4W, Single-Supply Class G Power Amplifier

Highest Output Power Speaker Amplifier From a Battery

Product Details

Key Features

Parametric specs for Speaker Amplifiers
# Channels 1
Class Boosted/G
Spkr. Amp. VCC (V) (min) 2.7
Spkr. Amp. VCC (V) (max) 5.5
Spkr. Amp. ICC (mA) (typ) 8
POUT into 8Ω @ 1% THD+N (W) (min) 2.4
POUT into 8Ω @ 10% THD+N (W) (min) 2.8
Spkr. Amp. Half Pwr. THD+N (%) 0.07
SNR (dB) (A- Weighted) 95
PSRR (dB) (min) 77
Package/Pins TQFN/28
WLP/20
Budgetary
Price (See Notes)
1.05
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Simplified Block Diagram

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Parameters

Parametric specs for Speaker Amplifiers
# Channels 1
Class Boosted/G
Spkr. Amp. VCC (V) (min) 2.7
Spkr. Amp. VCC (V) (max) 5.5
Spkr. Amp. ICC (mA) (typ) 8
POUT into 8Ω @ 1% THD+N (W) (min) 2.4
POUT into 8Ω @ 10% THD+N (W) (min) 2.8
Spkr. Amp. Half Pwr. THD+N (%) 0.07
SNR (dB) (A- Weighted) 95
PSRR (dB) (min) 77
Package/Pins TQFN/28
WLP/20
Budgetary
Price (See Notes)
1.05

Key Features

  • 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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX9730: Simplified Block Diagram MAX9730: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .