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MAX98400A Class D Amp with 20W Output, 92% Efficiency, I2C Control, Integrated Boost, 8ms Startup, Full Protection, & 6.5μV Noise for Premium Portable Audio
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
● LCD/PDP Televisions
● LCD Monitors
● 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.
INFORMATION
| Category | | |
| Manufacturer | Analog Devices Inc./Maxim Integrated | |
| Series | - | |
| Packaging | Tape & Reel (TR) Cut Tape (CT) Digi-Reel® | |
| Part Status | Active | |
| Type | Class D | |
| Output Type | 2-Channel (Stereo) | |
| Max Output Power x Channels @ Load | 20W x 2 @ 8Ohm | |
| Voltage - Supply | 8V ~ 28V | |
| Features | Depop, Differential Inputs, Short-Circuit and Thermal Protection, Shutdown | |
| Mounting Type | Surface Mount | |
| Operating Temperature | -40°C ~ 85°C (TA) | |
| Supplier Device Package | 36-TQFN (6x6) | |
| Package / Case | 36-WFQFN Exposed Pad | |
| Base Product Number |
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