MOSA
MS6863
Dual 2W Power Amplifiers with Stereo Headphone
Dual 2W Power Amplifiers / Stereo Headphone
Low Voltage, Pop Noise Free Function
FEATURES
‧Operation
range: 2.7V~5.5V
‧Shutdown
Current 0.4uA at 5V
‧Output
power, THD+N=1%
BTL, R
L
=3Ω, 2.3W at 5V
BTL, R
L
=4Ω, 2W at 5V, 0.8W at 3.3V, 500mW at 2.7V
BTL, R
L
=8Ω, 1.2W at 5V, 0.5W at 3.3V, 350mW at 2.7V
SE, R
L
=8Ω, 300mW at 5V,130mW at 3.3V, 85mW at 2.7V
SE, R
L
=32Ω, 90mW at 5V, 40mW at 3.3V, 25mW at 2.7V
‧Headphone
sense
‧Unity-gain
stable
‧pop
noise free control (extra function for pin7)
‧Space-saving
TSSOP20, enhance thermal pad
APPLICATIONS
‧Desktop
computer’s sound card
‧Portable
audio devices
‧Portable
digital TV
‧MP3
peripheral
‧Handheld
games
‧Cross-reference:
LM4863
DESCRIPTION
The MS6863 is a low distortion power amplifier that can drive 2*2W of continuous average power into a dual 4Ω
bridged-tied load (BTL) or 2 * 90mW into stereo 32Ω single ended (SE) loads headphone.
It
can automatically switch
between dual BTL and stereo SE modes utilizing a headphone sense pin. The BTL configuration eliminates the need
for external coupling capacitors on the output in most applications. The unity gain stable MS6863’s gain is set by
external gain-setting resistors.
The MS6863 has good feature for portable equipment, these features include the low voltage operation, micropower
consumption shutdown mode, enhance thermal pad and small package TSSOP20, make the MS6863 ideally suited for
use in portable audio equipments. The MS6863 has an extra selection for pin7 to achieve pop noise free in shutdown
control.
BLOCK DIAGRAM
V
DD
-INA
+INA
-
+
-OUT A
A1
BYPASS
-
+
A2
+OUT A
-INB
+INB
SD
HP-IN
Power
Manage
-
+
B1
-OUT B
-
+
B2
+OUT B
GND
REV 1
1
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MOSA [ MOSA ELECTRONICS ]
