LM49251

AKTIV

1,37-W-Stereo-Kopfhörerverstärker (Klasse AB) mit Analogeingang und 20 mW

Jetzt bestellen

Datenblatt

document-pdfAcrobat Stereo Audio w/Class G Headphone Amp & Class D Speaker Amp w/Speaker Protection datasheet (Rev. A) (Englisch)

LM49251

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Audio input type

Analog Input

Architecture

Class-D

Speaker channels (max)

Stereo

Control interface

I2C

Output power (W)

1.37

Power stage supply (max) (V)

5.5

Power stage supply (min) (V)

2.7

THD + N at 1 kHz (%)

0.02

Load (min) (Ω)

4

Analog supply voltage (min) (V)

2.7

Analog supply voltage (max) (V)

5.5

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Audio input type

Analog Input

Architecture

Class-D

Speaker channels (max)

Stereo

Control interface

I2C

Output power (W)

1.37

Power stage supply (max) (V)

5.5

Power stage supply (min) (V)

2.7

THD + N at 1 kHz (%)

0.02

Load (min) (Ω)

4

Analog supply voltage (min) (V)

2.7

Analog supply voltage (max) (V)

5.5

Rating

Catalog

Operating temperature range (°C)

-40 to 85

DSBGA (YZR)

30

8.9375 mm² 3.25 x 2.75

Class G Ground Referenced Headphone Outputs
E²S Class D Amplifier
No Clip Function
Power Limiter Speaker Protection
I²C Volume and Mode Control
Advanced Click-and-Pop Suppression
Micro-Power Shutdown

Key Specifications

Class G Headphone Amplifier, HPV_DD = 1.8V, R_L = 32Ω
- IDDQ_HP: 1.15 mA (Typ)
- Output Power, THD+N ≤ 1%: 20 mW (Typ)
Stereo Class D Speaker Amplifier R_L = 8Ω
- Output Power, THD+N ≤ 1%, LSV_DD = 5.0V: 1.37 W (Typ)
- Output Power, THD+N ≤ 1%, LSV_DD = 3.6V: 680 mW (Typ)
- Efficiency: 90% (Typ)

All trademarks are the property of their respective owners.

Class G Ground Referenced Headphone Outputs
E²S Class D Amplifier
No Clip Function
Power Limiter Speaker Protection
I²C Volume and Mode Control
Advanced Click-and-Pop Suppression
Micro-Power Shutdown

Key Specifications

Class G Headphone Amplifier, HPV_DD = 1.8V, R_L = 32Ω
- IDDQ_HP: 1.15 mA (Typ)
- Output Power, THD+N ≤ 1%: 20 mW (Typ)
Stereo Class D Speaker Amplifier R_L = 8Ω
- Output Power, THD+N ≤ 1%, LSV_DD = 5.0V: 1.37 W (Typ)
- Output Power, THD+N ≤ 1%, LSV_DD = 3.6V: 680 mW (Typ)
- Efficiency: 90% (Typ)

All trademarks are the property of their respective owners.

The LM49251 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. Part of TI’s PowerWise family of products, the LM49251 utilizes a high efficiency class G headphone amplifier topology as well as a high efficiency class D loudspeaker.

The headphone amplifiers feature TI’s class G ground referenced architecture that creates a ground-referenced output with dynamic supply rails for optimum efficiency. The stereo class D speaker amplifier provides both a no-clip feature and speaker protection. The Enhanced Emission Suppression (E²S) outputs feature a patented, ultra low EMI PWM architecture that significantly reduces RF emissions.

The LM49251 features separate volume controls for the mono and stereo inputs. Mode selection, shutdown control, and volume are controlled through an I²C compatible interface.

Click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM49251 is available in an ultra-small 30-bump DSBGA package (2.55mmx3.02mm)

The LM49251 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. Part of TI’s PowerWise family of products, the LM49251 utilizes a high efficiency class G headphone amplifier topology as well as a high efficiency class D loudspeaker.

The headphone amplifiers feature TI’s class G ground referenced architecture that creates a ground-referenced output with dynamic supply rails for optimum efficiency. The stereo class D speaker amplifier provides both a no-clip feature and speaker protection. The Enhanced Emission Suppression (E²S) outputs feature a patented, ultra low EMI PWM architecture that significantly reduces RF emissions.

The LM49251 features separate volume controls for the mono and stereo inputs. Mode selection, shutdown control, and volume are controlled through an I²C compatible interface.

Click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM49251 is available in an ultra-small 30-bump DSBGA package (2.55mmx3.02mm)

filter

Andere Universalaudioverstärker 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

Top-Dokumentation	Typ	Titel	Format-Optionen	Datum
*	Data sheet	Stereo Audio w/Class G Headphone Amp & Class D Speaker Amp w/Speaker Protection datasheet (Rev. A)		06 Apr 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 Design- und Simulationssuite mit vollem Funktionsumfang verwendet eine analoge Analyse-Engine von Cadence®. PSpice für TI ist kostenlos erhältlich und (...)

Anfordern

Gehäuse	Pins	CAD-Symbole, Footprints und 3D-Modelle
DSBGA (YZR)	30	Ultra Librarian

Es gelten die allgemeinen Geschäftsbedingungen von TI für Evaluierungsartikel.

LM49251

1,37-W-Stereo-Kopfhörerverstärker (Klasse AB) mit Analogeingang und 20 mW

LM49251

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