IC-Hersteller Maxim Integrated

IC-Hersteller (95)

Maxim Integrated MAX98400A

Stereo, High-Power, Class D Amplifiers

Details

TopologieAbwärtswandler
Eingangsspannung8-28 V
Schaltfrequenz265-395 kHz
Ausgang 14.47 V / 5 A

Beschreibung

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.

Eigenschaften

  • 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

Typische Anwendungen

  • Notebook PCs
  • MP3 Docking Stations
  • LCD Monitors
  • LCD/PDP Televisions

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieZ @ 100 MHz
(Ω)
Zmax
(Ω)
Testbedingung ZmaxIR 2
(mA)
RDC max.
(Ω)
Typ Muster
742792040SPEC
9 Dateien WE-CBF SMT-Ferrit 600 700 150 MHz 2000 0.15 High Current
Artikel Nr. Daten­blatt Simu­lation
742792040SPEC
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieZ @ 100 MHz
(Ω)
Zmax
(Ω)
Testbedingung ZmaxIR 2
(mA)
RDC max.
(Ω)
Typ Muster