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MAX98400B
Stereo, High-Power, Class D Amplifier
Differential Input, Power Limiting, Anticlipping, Thermal Foldback, and Excellent EMI Performance
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Key Features
Applications/Uses
Parametric specs for Speaker Amplifiers
| # Channels | 2 |
| Class | D |
| Spkr. Amp. VCC (V) (min) | 8 |
| Spkr. Amp. VCC (V) (max) | 28 |
| Spkr. Amp. ICC (mA) (typ) | 10 |
| POUT into 8Ω @ 1% THD+N (W) (min) | 13.5 |
| POUT into 8Ω @ 10% THD+N (W) (min) | 15 |
| Spkr. Amp. Half Pwr. THD+N (%) | 0.03 |
| SNR (dB) (A- Weighted) | 101 |
| PSRR (dB) (min) | 67 |
| Package/Pins | TQFN/24 |
| Budgetary Price (See Notes) | 2.1 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | Stereo, High-Power, Class D Amplifier | Nov 20, 2020 |
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 | 2 |
| Class | D |
| Spkr. Amp. VCC (V) (min) | 8 |
| Spkr. Amp. VCC (V) (max) | 28 |
| Spkr. Amp. ICC (mA) (typ) | 10 |
| POUT into 8Ω @ 1% THD+N (W) (min) | 13.5 |
| POUT into 8Ω @ 10% THD+N (W) (min) | 15 |
| Spkr. Amp. Half Pwr. THD+N (%) | 0.03 |
| SNR (dB) (A- Weighted) | 101 |
| PSRR (dB) (min) | 67 |
| Package/Pins | TQFN/24 |
| Budgetary Price (See Notes) | 2.1 |
Key Features
- Wide 8V to 28V Supply Voltage Range
- Single Supply Operation
- Low EMI: Active Emissions Limiting
- Clipping Limiter
- Low Quiescent Current
- Thermal Foldback
- Thermal and Overcurrent Protection
Applications/Uses
- LCD Monitors
- LCD/PDP Televisions
- MP3 Docking Stations
- Notebook PCs
Description
The MAX98400A/MAX98400B Class D amplifiers provide high-performance, thermally efficient amplifier solutions. The MAX98400A delivers 2x20W into 8Ω loads or 1x40W into a 4Ω load. The MAX98400B delivers 2x12W into 8Ω loads.
An integrated limiting circuit prevents output clipping distortion, protects small speakers from transient voltages, and reduces power dissipation.
A thermal-foldback feature can be enabled to automatically reduce the output power at above a junction temperature of +120°C. Traditional thermal protection is also available in addition to robust overcurrent protection.
The ICs operate from a single 8V to 28V supply and provide a high 67dB PSRR, eliminating the need for a regulated power supply. They offer up to 90% efficiency from a 12V supply.
Filterless modulation allows the ICs to pass EN55022B EMI limits with 1m cables using only a low-cost ferrite bead and small-value capacitor on each output.
Both devices feature eight-digitally-controlled gain settings.
Comprehensive click-and-pop reduction circuitry minimizes noise coming into and out of shutdown.
The MAX98400A/MAX98400B are available in 36-pin and 24-pin TQFN packages, respectively, and are specified over the -40°C to +85°C temperature range.
An integrated limiting circuit prevents output clipping distortion, protects small speakers from transient voltages, and reduces power dissipation.
A thermal-foldback feature can be enabled to automatically reduce the output power at above a junction temperature of +120°C. Traditional thermal protection is also available in addition to robust overcurrent protection.
The ICs operate from a single 8V to 28V supply and provide a high 67dB PSRR, eliminating the need for a regulated power supply. They offer up to 90% efficiency from a 12V supply.
Filterless modulation allows the ICs to pass EN55022B EMI limits with 1m cables using only a low-cost ferrite bead and small-value capacitor on each output.
Both devices feature eight-digitally-controlled gain settings.
Comprehensive click-and-pop reduction circuitry minimizes noise coming into and out of shutdown.
The MAX98400A/MAX98400B are available in 36-pin and 24-pin TQFN packages, respectively, and are specified over the -40°C to +85°C temperature range.
Technical Docs
| Data Sheet | Stereo, High-Power, Class D Amplifier | Nov 20, 2020 |
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