Datasheet > LM4666

LM4666

更新时间： 2024-11-10 02:58:27

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
22页	1448K
描述
Filterless High Efficiency Stereo 1.2W Switching

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LM4666 数据手册

LM4666, LM4666SDBD

www.ti.com

SNAS189A –MAY 2004–REVISED MAY 2013

LM4666

Filterless High Efficiency Stereo 1.2W Switching

Audio Amplifier

Check for Samples: LM4666, LM4666SDBD

FEATURES

DESCRIPTION

The LM4666 is a fully integrated single-supply high

•

No Output Filter Required for Inductive

Transducers

efficiency switching audio amplifier. It features an

innovative modulator that eliminates the LC output

filter used with typical switching amplifiers.

Eliminating the output filter reduces parts count,

simplifies circuit design, and reduces board area. The

LM4666 processes analog inputs with a delta-sigma

modulation technique that lowers output noise and

THD when compared to conventional pulse width

modulators.

•

Selectable Gain of 6dB or 12dB

Very Fast Turn On Time: 6ms (typ)

Minimum External Components

"Click and Pop" Suppression Circuitry

Micro-Power Shutdown Mode

Short Circuit Protection

Available in Space-Saving NHK0014A Package

The LM4666 is designed to meet the demands of

mobile phones and other portable communication

devices. Operating on a single 3V supply, it is

APPLICATIONS

capable of driving 8Ω transducer loads at

•

Mobile Phones

PDAs

continuous average output of 450mW with less than

1%THD+N. Its flexible power supply requirements

allow operation from 2.8V to 5.5V.

Portable Electronic Devices

The LM4666 has high efficiency with an 8Ω

transducer load compared to a typical Class AB

amplifier. With a 3V supply, the IC's efficiency for a

100mW power level is 79%, reaching 84% at 450mW

output power.

KEY SPECIFICATIONS

•

Efficiency at 3V, 100mW into 8Ω Transducer:

79% (typ)

Efficiency at 3V, 450mW into 8Ω Transducer:

84% (typ)

The LM4666 features a low-power consumption

shutdown mode. Shutdown may be enabled by

driving the Shutdown pin to a logic low (GND).

Efficiency at 5V, 1W into 8Ω Transducer: 85%

(typ)

The LM4666 has fixed selectable gain of either 6dB

or 12dB. The LM4666 has short circuit protection

against a short from the outputs to V_DDor GND.

Total Quiescent Power Supply Current: 7.0mA

(typ)

Total Shutdown Power Supply Current: 0.02µA

(typ)

Single supply range: 2.8V to 5.5V

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...22

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与LM4666相关器件

型号	品牌	获取价格	描述	数据表
LM4666_15	TI	获取价格	Filterless High Efficiency Stereo 1.2W Switching
LM4666SD	NSC	获取价格	Filterless High Efficiency Stereo 1.2W Switching Audio Amplifier
LM4666SD/NOPB	TI	获取价格	Filterless High Efficiency Stereo 1.2W Switching
LM4666SDA	NSC	获取价格	Filterless High Efficiency Stereo 1.2W Switching Audio Amplifier
LM4666SDBD	TI	获取价格	Filterless High Efficiency Stereo 1.2W Switching
LM4666SDX	NSC	获取价格	IC 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO14, LLP-14, Audio/Video Amplifier
LM4666SDX/NOPB	TI	获取价格	AUDIO AMPLIFIER
LM4667	NSC	获取价格	Filterless High Efficiency 1.3W Switching Audio Amplifier
LM4667	TI	获取价格	无线设备的音频解决方案
LM4667ITL	NSC	获取价格	Filterless High Efficiency 1.3W Switching Audio Amplifier

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