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2010.06 - Rev.A

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Class-AB Speaker Amplifiers

2W + 2W Stereo

Speaker / Headphone Amplifier

BH7881EFV

●

Description

The BH7881EFV is a low voltage, low noise, high output speaker/headphone amplifier IC, in which a Bi-CMOS process is

used. An on-chip speaker amplifier circuit that is capable of 2W+2W output can be used as a headphone amplifier by

switching the operating mode. This makes it possible to configure an audio system using few external devices.

With a built-in, low saturation regulator with programmable output voltage and output current, clear tone quality is obtained

even when directly connected to a digital power supply. A peripheral analog circuit can also be regulator driven. Furthermore,

the BH7881EFV provides speaker output and VREG output short-circuit detection functions, a thermal shutdown function with

hysteresis, and a speaker protection function.

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Features

1) Built-in low saturation type regulator (Digital power supply driver, voltage and current variable, short circuit detection)

2) Bass boost mode, gain switching functions

3) Speaker MUTE function (Headphone mode)

4) Built-in line amplifier output (gain adjustment, LPF setting) active/suspend function (TTL input control pin)

5) Hysteretic thermal shutdown function (Set for approximately 150℃ /90℃)

6) IC protection function (SP pin VCC/GND short circuit detection)

7) Speaker protection function (Output voltage amplitude control)

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Applications

Notebook computers, LCD TVs, etc.

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Absolute maximum ratings (Ta=25℃)

Parameter

Ratings

Unit

Supply voltage

+6.0

V

Power dissipation

1100 *1

mW

Storage temperature

-55～+125

℃

Operating temperature

-10～+70

℃

*1 Reduced by 11 mW/℃ at 25℃ or higher, when mounting on a 70mmX70mmX1.6mm PCB board).

●

Operating Conditions (Ta=25℃)

Parameter

Ratings

Unit

Supply voltage

+3.3～+5.5

V

* This IC is not designed to be radiation-resistant.

No.10077EAT05