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14VP-P, Class G Ceramic Speaker Driver

Class G, CeraMax Technology Drives Ceramic Speakers in the Smallest Footprint

Product Details

Key Features

Applications/Uses

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) 108
PSRR (dB) (min) 77
Package/Pins TQFN/28
WLP/20
Budgetary
Price (See Notes)
1.2
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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) 108
PSRR (dB) (min) 77
Package/Pins TQFN/28
WLP/20
Budgetary
Price (See Notes)
1.2

Key Features

  • Integrated Charge-Pump Power Supply—No Inductor Required
  • 14VP-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

Description

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 14VP-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.

Simplified Block Diagram

MAX9788: Simplified Block Diagram MAX9788: Simplified Block Diagram Zoom icon

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 .