Datasheet > G1450

G1450

更新时间： 2022-02-26 14:42:42

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描述
2.4W Stereo Audio Amplifier with DC Volume Control

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G1450 数据手册

G1450

Global Mixed-mode Technology Inc.

2.4W Stereo Audio Amplifier with DC Volume

Control

Features

General Description

32 Steps DC Volume Control from +20dB

The G1450 is a stereo audio power amplifier with dc

volume control in 16-pin SOP thermal pad package. It

can deliver 1.9W continuous RMS power into 4Ω load

per channel in Bridge-Tied Load (BTL) mode at 5V

supply voltage. Its THD is smaller than 1% under the

above operation condition. To simplify the audio sys-

tem design in the notebook application, the G1450

supports the Bridge-Tied Load (BTL) mode for driving

the speakers, Single-End (SE) mode for driving the

headphone. For the low current consumption applica-

tions, the shutdown mode is supported to disable the

G1450 when it is idle. The current consumption can be

reduced below 1µA.

~-80dB

Depop Circuitry Integrated

Output Power at 1% THD+N, VDD=5V

--1.9W/CH (typical) into a 4Ω Load

--1.25W/CH (typical) into a 8Ω Load

Output Power at 10% THD+N, VDD=5V

--2.4W/CH (typical) into a 4Ω Load

--1.55W/CH (typical) into a 8Ω Load

Bridge-Tied Load (BTL) and Single-Ended (SE)

Modes Supported

Maximum Output Power Clamping Circuitry

Integrated

Ultra Low Shutdown Current

Thermal Shutdown Protection

SOP-16 Package Available

The internal DC volume gain setting is ranged from

+20dB to -80dB with 32 steps. It is easily to get the

expected DC volume gain by applying the volume pin

with a suitable dc voltage.

The G1450 has embedded depop circuitry to suppress

the power-on or power-off transition noises. It also

supports the maximum output power clamping function

to protect the speakers from burned-out. Thermal pro-

tection circuitry is implemented to avoid unintentionally

damaging.

Applications

Notebooks

LCD Monitor or TV

Ordering Information

ORDER

NUMBER

G1450F81U

TEMP.

RANGE

PACKAGE

(Pb free)

MARKING

G1450

-40°C to +85°C

SOP-16 (FD)

Note: F8: SOP-16 (FD)

1: Bonding Code

U: Tape & Reel

Pin Configuration

G1450

MUTE

SHUTDOWN

RIN-

16 ROUT-

VDD

14 ROUT+

13 SE/BTL

12 GND

BYPASS

GND

Thermal

Pad

LIN-

LOUT+

VDD

VOLUME

VOLMAX

LOUT-

SOP-16 (FD)

Note : Recommend connecting the Thermal Pad to the GND for excellent power dissipation.

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 1.0

Dec 14, 2010

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