Datasheet > LM48510

LM48510

更新时间： 2024-11-09 04:20:07

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	401K
描述
Boosted Class D Audio Power Amplifier

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LM48510 数据手册

March 2007

LM48510

Boosted Class D Audio Power Amplifier

General Description

Key Specifications

The LM48510 integrates a boost converter with a high effi-

ciency mono, Class D audio power amplifier to provide 1.2W

continuous power into an 8Ω speaker when operating on a

3.3V power supply with boost voltage (PV₁) of 5.0V. When

operating on a 3.3V power supply, the LM48510 is capable of

driving a 4Ω speaker load at a continuous average output of

1.7W with less than 1% THD+N. The Class D amplifier is a

low noise, filterless PWM architecture that eliminates the out-

put filter, reducing external component count, board area

consumption, system cost, and simplifying design.

■ꢀQuiescent Power Supply Current

■ꢀOutput Power

(R_L= 8Ω, THD+N ≤ 1%,

V_DD= 3.3V, PV₁= 5.0V)

6mA (typ)

1.2W (typ)

0.01μA (typ)

■ꢀShutdown Current

Features

Click and Pop Suppression

■

The LM48510's switching regulator is a current-mode boost

converter operating at a fixed frequency of 0.6MHz.

Low 0.01μA Shutdown Current

76% Efficiency

■

The LM48510 is designed for use in mobile phones and other

portable communication devices. The high (76%) efficiency

extends battery life when compared to Boosted Class AB am-

plifiers. The LM48510 features a low-power consumption

shutdown mode. Shutdown may be enabled by driving the

Shutdown pin to a logic low (GND).

Filterless Class D

2.7V - 5.0V operation (V_DD

)

Externally configurable gain on Class D

Very fast turn on time: 17μs

Independent Boost and Amplifier shutdown pins

The gain of the Class D is externally configurable which allows

independent gain control from multiple sources by summing

the signals. Output short circuit and Thermal shutdown pro-

tection prevent the device from damage during fault condi-

tions. Superior click and pop suppression eliminates audible

transients during power-up and shutdown.

Applications

Mobile Phones

■

PDAs

Portable media

Cameras

Handheld games

■

Typical Application

20123266

FIGURE 1. Typical LM48510 Audio Amplifier Application Circuit

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

201232

www.national.com

12 3 4 5 6 7...20

中文翻译

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与LM48510相关器件

型号	品牌	获取价格	描述	数据表
LM48510_0710	NSC	获取价格	Boosted Class D Audio Power Amplifier
LM48510SD	NSC	获取价格	Boosted Class D Audio Power Amplifier
LM48510SDX	NSC	获取价格	IC 1.7 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO16, LLP-16, Audio/Video Amplifier
LM48511	NSC	获取价格	3W, Ultra-Low EMI, Filterless, Mono, Class D Audio Power Amplifier with Spread Spectrum
LM48511	TI	获取价格	具有集成升压转换器的 3W 单声道、模拟输入 D 类音频放大器
LM48511_08	NSC	获取价格	3W, Ultra-Low EMI, Filterless, Mono, Class D Audio Power Amplifier with Spread Spectrum
LM48511SQ	NSC	获取价格	3W, Ultra-Low EMI, Filterless, Mono, Class D Audio Power Amplifier with Spread Spectrum
LM48511SQ/NOPB	TI	获取价格	具有集成升压转换器的 3W 单声道、模拟输入 D 类音频放大器 \| NHZ \| 24 \|
LM48511SQX/NOPB	TI	获取价格	具有集成升压转换器的 3W 单声道、模拟输入 D 类音频放大器 \| NHZ \| 24 \|
LM48512	TI	获取价格	PowerWiseÂ® Boosted, Ultra Low-EMI, Mono, E2S

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