Datasheet > LM4651_09

LM4651_09

更新时间： 2024-11-23 05:42:23

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器功率放大器
页数	文件大小	规格书
32页	1964K
描述
170W Class D Audio Power Amplifier Solution

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中文翻译

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LM4651_09 数据手册

OBSOLETE

LM4651 & LM4652

Overture™ Audio Power

Amplifier

July 9, 2009

170W Class D Audio Power Amplifier Solution

General Description

Key Specifications

The IC combination of the LM4651 driver and the LM4652

power MOSFET provides a high efficiency, Class D sub-

woofer amplifier solution.

Output power into 4Ω with < 10% THD.

THD at 10W, 4Ω, 10 − 500Hz.

Maximum efficiency at 125W

Standby attenuation.

170W (Typ)

< 0.3% THD (Typ)

85% (Typ)

■

The LM4651 is a fully integrated conventional pulse width

modulator driver IC. The IC contains short circuit, under volt-

age, over modulation, and thermal shut down protection cir-

cuitry. The LM4651also contains a standby function which

shuts down the pulse width modulation minimizing supply

current. The LM4652 is a fully integrated H-bridge power

MOSFET IC in a TO-220 power package. The LM4652 has a

temperature sensor built in to alert the LM4651 when the die

temperature of the LM4652 exceeds the threshold. Together,

these two IC's form a simple, compact high power audio am-

plifier solution complete with protection normally seen only in

Class AB amplifiers. Few external components and minimal

traces between the IC's keep the PCB area small and aids in

EMI control.

>100dB (Min)

Features

Conventional pulse width modulation.

■

Externally controllable switching frequency.

50kHz to 200kHz switching frequency range.

Integrated error amp and feedback amp.

Turn−on soft start and under voltage lockout.

Over modulation protection (soft clipping).

■

Externally controllable output current limiting and thermal

shutdown protection.

Self checking protection diagnostic.

■

The near rail-to-rail switching amplifier substantially increases

the efficiency compared to Class AB amplifiers. This high ef-

ficiency solution significantly reduces the heat sink size com-

pared to a Class AB IC of the same power level. This two-chip

solution is optimum for powered subwoofers and self powered

speakers.

Applications

Powered subwoofers for home theater and PC's

■

Car booster amplifier

Self-powered speakers

Connection Diagrams

LM4651 Plastic Package

LM4652 Plastic Package (Note 8)

10127773

Isolated TO-220 Package

Order Number LM4652TF

See NS Package Number TF15B

Non-Isolated TO-220 Package

Order Number LM4652TA

See NS Package Number TA15A

10127772

Top View

Order Number LM4651N

See NS Package Number N28B

Overture^®is a registered trademark of National Semiconductor.

101277

www.national.com

101277 Version 9 Revision 2 Print Date/Time: 2009/07/09 16:41:57

12 3 4 5 6 7...32

中文翻译

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与LM4651_09相关器件

型号	品牌	获取价格	描述	数据表
LM4651N	NSC	获取价格	LM4651 & LM4652 Overture⑩ Audio Power Amplifi
LM4651N/NOPB	TI	获取价格	IC 170 W, 1 CHANNEL, AUDIO AMPLIFIER, PDIP28, N28B, Audio/Video Amplifier
LM4652	NSC	获取价格	LM4651 & LM4652 Overture⑩ Audio Power Amplifi
LM4652TA	NSC	获取价格	LM4651 & LM4652 Overture⑩ Audio Power Amplifi
LM4652TF	NSC	获取价格	LM4651 & LM4652 Overture⑩ Audio Power Amplifi
LM4652TF/NOPB	TI	获取价格	170W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15, ISOLATED, PLASTIC, TO-220, 15 PIN
LM4663	NSC	获取价格	2 Watt Stereo Class D Audio Power Amplifier with Stereo Headphone Amplifier
LM4663MT	NSC	获取价格	2 Watt Stereo Class D Audio Power Amplifier with Stereo Headphone Amplifier
LM4663MT/NOPB	ROCHESTER	获取价格	2.1W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24, TSSOP-24
LM4663MTX	ROCHESTER	获取价格	2.1W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24, TSSOP-24

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