Top ![]()
MAX9738
16VP-P Class G Amplifier with Inverting Boost Converter
Industry's Smallest Inductor-Based Boost Solution to Drive Ceramic Speakers
from a Li-Ion Battery
MyMaxim SubscriptionsProduct 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) | 16.5 |
| POUT into 8Ω @ 1% THD+N (W) (min) | 0.25 |
| Spkr. Amp. Half Pwr. THD+N (%) | 0.07 |
| SNR (dB) (A- Weighted) | 95 |
| PSRR (dB) (min) | 70 |
| Package/Pins | WLP/20 |
| Budgetary Price (See Notes) | 1.56 |
View Less
Simplified Block Diagram
Technical Docs
| Data Sheet | 16VP-P Class G Amplifier with Inverting Boost Converter | Apr 03, 2008 | |
| Tutorial | Amplifier Considerations in Ceramic Speaker Applications |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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) | 16.5 |
| POUT into 8Ω @ 1% THD+N (W) (min) | 0.25 |
| Spkr. Amp. Half Pwr. THD+N (%) | 0.07 |
| SNR (dB) (A- Weighted) | 95 |
| PSRR (dB) (min) | 70 |
| Package/Pins | WLP/20 |
| Budgetary Price (See Notes) | 1.56 |
Key Features
- Integrated Inverting Boost Converter
- 2.7V to 5.5V Single-Supply Operation
- 16VP-P Output Voltage Swing, Ideal for Driving a Ceramic Speaker
- Maintains Output Voltage Swing as the Battery Decays
- Clickless/Popless Operation
- Small, Thermally Efficient 5x4 WLP Package (2.5mm x 2mm)
Applications/Uses
- Cellular Phones
- Handheld Gaming Consoles
- MP3 Players
- Notebook Computers
- Personal Media Players
- Smartphones
Description
The MAX9738 features a mono Class G power amplifier with an integrated inverting boost converter. The Class G amplifier is specifically designed to drive the high capacitance of a ceramic/piezoelectric loud-speaker. The inverting boost converter can typically supply up to 400mA of peak output current, allowing for a constant output of 16VP-P over the 2.7V to 5.5V supply voltage range.
The MAX9738 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.
The MAX9738 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 MAX9738 is fully specified over the -40°C to +85°C extended temperature range and is available in an ultra-small, lead-free 5x4 WLP (2.5mm x 2mm) package.
The MAX9738 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.
The MAX9738 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 MAX9738 is fully specified over the -40°C to +85°C extended temperature range and is available in an ultra-small, lead-free 5x4 WLP (2.5mm x 2mm) package.
Technical Docs
| Data Sheet | 16VP-P Class G Amplifier with Inverting Boost Converter | Apr 03, 2008 | |
| Tutorial | Amplifier Considerations in Ceramic Speaker Applications |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Request a Quote