LM4651N National Semiconductor, LM4651N Datasheet

LM4651N

Manufacturer Part Number

LM4651N

Description

Manufacturer

National Semiconductor

Datasheets

1.LM4651N.pdf (20 pages)

2.LM4651N.pdf (20 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM4651N

Manufacturer:

NSC

Quantity:

5 510

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM4651N

Manufacturer:

NS/国半

Quantity:

20 000

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LM4651 & LM4652 Overture

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.

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.

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.

Connection Diagrams

Overture

is a registered trademark of National Semiconductor Corporation.

See NS Package Number N28B

LM4651 Plastic Package

Order Number LM4651N

Top View

DS101277-72

DS101277

™

Key Specifications

n Output power into 4

n THD at 10W, 4 , 10 − 500Hz.

n Maximum efficiency at 125W

n Standby attenuation.

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

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

Audio Power Amplifier

protection.

LM4652 Plastic Package (Note 8)

See NS Package Number TF15B

See NS Package Number TA15A

Non-Isolated TO-220 Package

Order Number LM4652TF

Order Number LM4652TA

Isolated TO-220 Package

with

10% THD.

DS101277-73

0.3% THD (Typ)

www.national.com

August 2000

100dB (Min)

170W (Typ)

85% (Typ)

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