LM4651

更新时间： 2024-09-14 22:51:51

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
20页	589K
描述
LM4651 & LM4652 Overture⑩ Audio Power Amplifier 170W Class D Audio Power Amplifier Solution

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LM4651 数据手册

August 2000

™

LM4651 & LM4652 Overture Audio Power Amplifier

170W Class D Audio Power Amplifier Solution

General Description

The IC combination of the LM4651 driver and the LM4652

power MOSFET provides a high efficiency, Class D sub-

woofer amplifier solution.

Key Specifications

n Output power into 4Ω with 10% THD.

170W (Typ)

0.3% THD (Typ)

85% (Typ)

n THD at 10W, 4Ω, 10 − 500Hz.

n Maximum efficiency at 125W

n Standby attenuation.

The LM4651 is a fully integrated conventional pulse width

modulator driver IC. The IC contains short circuit, under

voltage, over modulation, and thermal shut down protection

circuitry. It contains a standby function, which shuts down

the pulse width modulation and minimizes supply current.

The LM4652 is a fully integrated H-bridge power MOSFET

IC in a TO-220 power package. Together, these two IC’s

form a simple, compact high power audio amplifier 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

n Conventional pulse width modulation.

n Externally controllable switching frequency.

n 50kHZ to 200kHz switching frequency range.

n Integrated error amp and feedback amp.

n Turn−on soft start and under voltage lockout.

n Over modulation protection (soft clipping).

n Short circuit current limiting and thermal shutdown

protection.

The near rail-to-rail switching amplifier substantially in-

creases the efficiency compared to Class AB amplifiers. This

high efficiency solution significantly reduces the heat sink

size compared to a Class AB IC of the same power level.

This two-chip solution is optimum for powered subwoofers

and self powered speakers.

n 15 Lead TO−220 isolated package.

n Self checking protection diagnostic.

Applications

n Powered subwoofers for home theater and PC’s

n Car booster amplifier

n Self-powered speakers

Connection Diagrams

LM4651 Plastic Package

LM4652 Plastic Package (Note 8)

DS101277-73

Isolated TO-220 Package

Order Number LM4652TF

See NS Package Number TF15B

DS101277-72

Non-Isolated TO-220 Package

Order Number LM4652TA

See NS Package Number TA15A

Top View

Order Number LM4651N

See NS Package Number N28B

Overture^®is a registered trademark of National Semiconductor Corporation.

DS101277

www.national.com

12 3 4 5 6 7...20

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与LM4651相关器件

型号	品牌	获取价格	描述	数据表
LM4651_09	NSC	获取价格	170W Class D Audio Power Amplifier Solution
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

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