MOSA
MS6891
Mono 1.1W Power Amplifier with Shutdown
Mono 1.1W Power Amplifier with Shutdown,
Low Voltage Operation
FEATURES
‧Operation
range: 2.5V ~ 6.5V
‧Shutdown
Current 0.1uA at 6V
‧PSRR
at 217Hz, 60dB at 5V
‧Output
power, THD+N=1%
R
L
=8Ω, 1.5W at 6V, 1.1W at 5V, 0.4W at 3.3V, 200mW at 2.5V
‧Unity-gain
stable
‧Space-saving
SOP8 , MSOP8
APPLICATIONS
‧Portable
electronic devices
‧PDAs
‧Communication
headsets
Cross-reference
LM4891
DESCRIPTION
The MS6891 is a low distortion power amplifier that can drive 1.5W（6V） of continuous average power into a
mono 8Ω bridged-tied load (BTL). Operation with 2.5V supply, it can drive 200mw into a mono 8Ω. The BTL
configuration eliminates the need for external coupling capacitors on the output in most applications. The MS6891 is
unity-gain stable and can be configured by external gain-setting resistors.
The MS6891 has good feature for portable equipment, these features include the low voltage operation, micropower
consumption shutdown mode, small package SOP8, MSOP8, make the MS6891 ideally suited for use in portable
electronic equipments.
BLOCK DIAGRAM
- IN
4
+ IN
3
-
+
A1
-
5
Vo1
-
BP
2
+
Bias
control
A2
+
8
Vo2
SHDN
1
V
DD
GND
6
7
REV 1
1/10
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MOSA [ MOSA ELECTRONICS ]
