LM4925MM datasheet(1/15 Pages) NSC

tên linh kiện	LM4925MM

Giải thích chi tiết về linh kiện	2 Cell, Single Ended Output, 40mW Stereo Headphone Audio Amplifier

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nhà sản xuất	NSC [National Semiconductor (TI)]

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LM4925

2 Cell, Single Ended Output, 40mW Stereo Headphone

Audio Amplifier

General Description

The unity gain stable LM4925 is both a mono differential

output (for BTL operation) audio amplifier and a Single

Ended (SE) stereo headphone amplifier. Operating on a

single 3V supply, the mono-BTL mode delivers 410mW into

an 8

Ω load at 1% THD+N. In Single Ended stereo head-

phone mode, the amplifier delivers 40mW per channel into a

16

Ω load at 1% THD+N.

With the LM4925 packaged in the MM and LLP packages,

the customer benefits include low profile and small size. This

package minimizes PCB area and maximizes output power.

The LM4925 features circuitry that reduces output transients

(“clicks” and “pops”) during device turn-on and turn-off, an

externally controlled, low-power consumption, active-low

shutdown mode, and thermal shutdown. Boomer audio

power amplifiers are designed specifically to use few exter-

nal components and provide high quality output power in a

surface mount package.

Key Specifications

n

Mono-BTL Output Power

n

(R

L =8

Ω,V

DD = 3.0V, THD+N = 1%)

410mW (typ)

n

Single Ended Output Power Per Channel

n

(R

L =16

Ω,V

DD = 3.0V, THD+N = 1%)

40mW (typ)

n

Micropower shutdown current

0.1µA (typ)

n

Supply voltage operating range

1.5V < V

DD < 3.6V

n

PSRR 100Hz, V

DD = 3V, BTL

70dB (typ)

Features

n

BTL mode for mono speaker

n

2-cell 1.5V to 3.6V battery operation

n

Single ended headphone operation with output coupling

capacitors

n

Unity-gain stable

n

“Click and pop” suppression circuitry for both Shutdown

and Mute

n

Active low micro-power shutdown

n

Active-low mute mode

n

Thermal shutdown protection circuitry

Applications

n

Portable two-cell audio products

n

Portable two-cell electronic devices

Typical Application

Boomer® is a registered trademark of National Semiconductor Corporation.

20121157

FIGURE 1. Block Diagram

February 2005

DS201211

www.national.com

Số phần tương tự - LM4925MM

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Mô tả tương tự - LM4925MM

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