MAX98400AETX

Product Summary

The MAX98400AETX is a Class D Amplifier. The MAX98400AETX Class D amplifiers provide high-performance, thermally efficient amplifier solutions. The MAX98400AETX 2x20W into 8I loads or 1x40W into a 4I load. The MAX98400AETX deliver 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 applications of the MAX98400AETX include LCD/PDP Televisions, LCD Monitors, MP3 Docking Stations and Notebook PCs.

Parametrics

MAX98400AETX absolute maximum ratings: (1)PVDD to PGND: -0.3V to +30V; (2)VS to GND: -0.3V to +6V; (3)SHDN, MONO to GND: -0.3V to +6V; (4)IN_ to GND: -0.3V to +6V; (5)G1, G2, RELEASE, TEMPLOCK, LIM_TH to GND: -0.3V to (VS + 0.3V); (6)Continuous Current into OUT_: +2.4A; (7)Continuous Current into PVDD, PGND: +4.8A; (8)Continuous Current into All Other Pins: +10mA; (9)Duration of OUT_ Short Circuit to PVDD or PGND: Continuous; (10)Duration of Short Circuit Between OUT_+ and OUT_-: Continuous; (11)(derate 35.7mW/NC above +70NC): 2857.1mW; (12)BJA: 28NC/W; (13)24-Pin TQFN Multilayer Board (derate 27.8mW/NC above +70NC):35.7mW; (14)Junction Temperature: +150NC; (15)Operating Temperature Range: -40NC to +85NC; (16)Storage Temperature Range: -65NC to +150NC; (17)Lead Temperature (soldering, 10s): +300NC; (18)Soldering Temperature (reflow): +260NC.

Features

MAX98400AETX features: (1)Wide 8V to 28V Supply Voltage Range; (2)Single-Supply Operation; (3)Low EMI: Active Emissions Limiting; (4)Clipping Limiter; (5)Low Quiescent Current; (6)Thermal Foldback; (7)Thermal and Overcurrent Protection.

Diagrams