BH7881EFV_10 Datasheet, PDF (1/10 Pages) Rohm – 2W + 2W Stereo Speaker / Headphone Amplifier

Class-AB Speaker Amplifiers
2W + 2W Stereo
Speaker / Headphone Amplifier
BH7881EFV
No.10077EAT05
●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.
●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)
●Applications
Notebook computers, LCD TVs, etc.
●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.
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2010.06 - Rev.A