LM4938

AKTIV

Stereo-2W-Audio-Leistungsverstärker mit DC-Lautstärkeregelung und wählbarer Verstärkung

Jetzt bestellen

Datenblatt

document-pdfAcrobat LM4938 Stereo 2W Audio Pwr Amp w/DC Vol Cntrl & Selectable Gain datasheet (Rev. B) (Englisch)

LM4938

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Audio input type

Analog Input

Architecture

Class-AB

Speaker channels (max)

Stereo

Rating

Catalog

Power stage supply (max) (V)

5.5

Power stage supply (min) (V)

2.7

Load (min) (Ω)

3

Output power (W)

2.2

THD + N at 1 kHz (%)

0.05

Iq (typ) (mA)

11

Control interface

GPIO

Closed/open loop

Open

Analog supply (min) (V)

2.7

Analog supply voltage (max) (V)

5.5

PSRR (dB)

78

Operating temperature range (°C)

-20 to 85

Audio input type

Analog Input

Architecture

Class-AB

Speaker channels (max)

Stereo

Rating

Catalog

Power stage supply (max) (V)

5.5

Power stage supply (min) (V)

2.7

Load (min) (Ω)

3

Output power (W)

2.2

THD + N at 1 kHz (%)

0.05

Iq (typ) (mA)

11

Control interface

GPIO

Closed/open loop

Open

Analog supply (min) (V)

2.7

Analog supply voltage (max) (V)

5.5

PSRR (dB)

78

Operating temperature range (°C)

-20 to 85

HTSSOP (PWP)

28

62.08 mm² 9.7 x 6.4

Improved Click and Pop Circuitry Virtually Eliminates Noise During Turn On/Off Transitions
DC Volume Control Interface
System Beep Detect
Stereo Switchable Bridged/Single-Ended Power Amplifiers
Selectable Internal/External Gain and Bass Boost
Thermal Shutdown Protection Circuitry
Unity Gain Stable

Key Specifications

P_O at 1% THD+N
- into 3Ω: 2.2W (typ)
- into 4Ω: 2.0W (typ)
- into 8Ω: 1.3W (typ)
Single-ended mode
- THD+N at 92mW into 32Ω: 1.0% (typ)
Shutdown Current: 0.5µA (typ)

All trademarks are the property of their respective owners.

Improved Click and Pop Circuitry Virtually Eliminates Noise During Turn On/Off Transitions
DC Volume Control Interface
System Beep Detect
Stereo Switchable Bridged/Single-Ended Power Amplifiers
Selectable Internal/External Gain and Bass Boost
Thermal Shutdown Protection Circuitry
Unity Gain Stable

Key Specifications

P_O at 1% THD+N
- into 3Ω: 2.2W (typ)
- into 4Ω: 2.0W (typ)
- into 8Ω: 1.3W (typ)
Single-ended mode
- THD+N at 92mW into 32Ω: 1.0% (typ)
Shutdown Current: 0.5µA (typ)

All trademarks are the property of their respective owners.

The LM4938 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4Ω with less than 1.0% THD or 2.2W into 3Ω with less than 1.0% THD.

Boomer audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4938 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications.

The LM4938 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance.

Note 1: When properly mounted to the circuit board, LM4938MH will deliver 2W into 4Ω. See Application Information section for more information.

Note 2: An LM4938MH that has been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3Ω.

The LM4938 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4Ω with less than 1.0% THD or 2.2W into 3Ω with less than 1.0% THD.

Boomer audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4938 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications.

The LM4938 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance.

Note 1: When properly mounted to the circuit board, LM4938MH will deliver 2W into 4Ω. See Application Information section for more information.

Note 2: An LM4938MH that has been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3Ω.

open-in-new

Andere Lautsprecherverstärker suchen

Herunterladen Video mit Transkript ansehen Video

Technische Dokumentation

star

=Von TI ausgewählte Top-Empfehlungen für dieses Produkt

Keine Ergebnisse gefunden. Bitte geben Sie einen anderen Begriff ein und versuchen Sie es erneut.

Alle anzeigen 1

	Typ	Titel		Datum
*	Data sheet	LM4938 Stereo 2W Audio Pwr Amp w/DC Vol Cntrl & Selectable Gain datasheet (Rev. B)		01 Mai 2013

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Simulationstool

PSPICE-FOR-TI — PSpice® für TI Design-und Simulationstool

PSpice® für TI ist eine Design- und Simulationsumgebung, welche Sie dabei unterstützt, die Funktionalität analoger Schaltungen zu evaluieren. Diese voll ausgestattete Design- und Simulationssuite verwendet eine analoge Analyse-Engine von Cadence®. PSpice für TI ist kostenlos erhältlich und (...)

Anfordern

Gehäuse	Pins	Herunterladen
HTSSOP (PWP)	28	Optionen anzeigen

Es gelten die allgemeinen Geschäftsbedingungen von TI für Evaluierungsartikel.

LM4938

Stereo-2W-Audio-Leistungsverstärker mit DC-Lautstärkeregelung und wählbarer Verstärkung

LM4938

Produktdetails

Key Specifications

Key Specifications

Technische Dokumentation

Design und Entwicklung

PSPICE-FOR-TI — PSpice® für TI Design-und Simulationstool

Bestellen & Qualität

Support und Schulungen

TI E2E™-Foren mit technischem Support von TI-Ingenieuren

Videoreihe

Videos