Low Voltage Audio Power Amplifier
General Description
isapoweramplifierdesignedforuseinlowvolt-
ageconsumerapplications.Thegainisinternallysetto20to
keep external part count low, but the addition of an external
resistor and capacitor between pins 1 and 8 will increase the
gain to any value from 20 to 200.
The inputs are ground referenced while the output automati-
cally biases to one-half the supply voltage. The quiescent
power drain is only 24 milliwatts when operating from a 6 volt
supply,makingthe
Features
n Battery operation
n Minimum external parts
nWidesupplyvoltagerange:4V–12V
n Low quiescent current drain: 4mA
n Voltage gains from 20 to 200
n Ground referenced input
n Self-centering output quiescent voltage
n Low distortion: 0.2% (A
V
= 20, V
S
=6V,R
L
=8Ω,P
O
=
125mW, f = 1kHz)
nAvailablein8pinSOPpackage
Applications
nAM-FMradioamplifiers
nPortabletapeplayeramplifiers
nIntercoms
nTVsoundsystems
nLinedrivers
nUltrasonicdrivers
nSmallservodrivers
nPowerconverters
Equivalent Schematic and Connection Diagrams
Small Outline,
Wing Shing Computer Components Co., (H.K.)Ltd. Tel:(852)2341 9276 Fax:(852)2797 8153
Homepage: http://www.wingshing.com E-mail: wsccltd@hkstar.com