Datasheet Maxim MAX98400AETX+ — 数据表

19-5286; Rev 0; 6/10 TION KIT EVALUA BLE AVAILA Stereo, High-Power, Class D Amplifiers
General Description Features
S Wide 8V to 28V Supply Voltage Range S Single-Supply Operation S Low EMI: Active Emissions Limiting S Clipping Limiter S Low Quiescent Current S Thermal Foldback S Thermal and Overcurrent Protection MAX98400A/MAX98400B The MAX98400A/MAX98400B Class D amplifiers provide high-performance, thermally efficient amplifier solutions. The MAX98400A delivers 2x20W into 8I loads or 1x40W into a 4I load. The MAX98400B delivers 2x12W into 8I 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 +120NC. 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 -40NC to +85NC temperature range. Applications
LCD/PDP Televisions LCD Monitors MP3 Docking Stations Notebook PCs Ordering Information
PART MAX98400AETX+ MAX98400BETG+ PIN-PACKAGE 36 TQFN-EP* 24 TQFN-EP* SPEC 2x20W 2x12W Note: Devices operate over the -40°C to +85°C temperature range. *EP = Exposed pad. Simplified Block Diagram INLCLIPPING LIMITER PGA CLASS D MODULATOR AND H-BRIDGE OUTL-INL+ OUTL+ MONO* MAX98400A/B
INRCLIPPING LIMITER PGA CLASS D MODULATOR AND H-BRIDGE OUTR-INR+ OUTR+ *MAX98400A ONLY _______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. Stereo, High-Power, Class D Amplifiers MAX98400A/MAX98400B
Table of ConTenTs
Absolute Maximum Ratings 4 Electrical Characteristics 4 Typical Operating Characteristics . 7 Pin Configurations 12 Pin Descriptions 12 Stereo Configuration for MAX98400A . 14 Mono Configuration for MAX98400A 15 Detailed Description . 15 Efficie …