MOSA MS6864TGU

MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
Dual 2W Power Amplifier, I2C interface
Stereo Input with Volume Control
FEATURES
•Operation range: 2.4V ~ 6.5V
•Volume control range
Gain: 0 to 21dB, 3dB/step
Attenuation: 0 to -77.5dB, 1.25dB/step
•Output mode : Speaker( BTL)/Headphone(SE)
•BTL Output power
RL=4Ω, 2W at 5V, 0.8W at 3.3V, 360mW at 2.4V
RL=8Ω, 1.3W at 5V, 0.53W at 3.3V, 250mW at 2.4V
•SE Output power
RL=32Ω, 93mW at 5V, 35mW at 3.3V, 15mW at 2.4V
•Control interface : I2C
•Excellent Power Supply Rejection Ratio(PSRR)
•Flexibility power management
•Component less
•Reduce pop noise circuit
•Housed in TSSOP16(enhanced thermal PAD) ,
SSOP20(209mils) package
APPLICATIONS
Multimedia system, Portable Digital Audio.
DESCRIPTION
The MS6864 is low distortion stereo power amplifier (SE/BTL) integrated volume control. It can drive 2W of
continuous average power into a dual 4Ω bridged-tied (BTL) speaker or 2 * 90mW into stereo 32Ω single ended (SE)
headphone. The volume control offers wide range of gain and attenuation for stereo input. All of the functions are easy
setting that can be set by I2C interface.
The MS6864 has good features for portable equipment, including wide voltage operation 2.4V~6.5V, low power
consumption, power management, component less, make the MS6864 ideally suitable for use in the portable digital
audio equipments.
BLOCK DIAGRAM
REV 2
1/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
PIN CONFIGURATION
Symbol
Description
Pin
VSS
1
Connected to ground
CAP
2
Capacitor connected
RIN
3
Right channel input
AVSS
4
OUTR-
5
PVDDR
6
OUTR+
7
PVSSR
8
PVSSL
9
OUTL+
10
PVDDL
11
OUTL-
12
AVDD
13
Negative supply voltage
SE right channel output or negative
output of BTL right channel
Positive supply voltage for right
channel of power amplifier
Positive output of BTL right channel
Negative supply voltage for right
channel of power amplifier
Negative supply voltage for left channel
of power amplifier
Positive output of BTL left channel
Positive supply voltage for left channel
of power amplifier
SE left channel output or negative
output of BTL left channel
Positive supply voltage
LIN
14
Left channel input
SDA
15
I2C data input
VSS 1
16 SCL
CAP 2
15 SDA
RIN 3
14 LIN
AVSS 4
13 AVDD
Thermal
Pad
OUTR- 5
12 OUTL-
PVDDR 6
11 PVDDL
OUTR+ 7
10 OUTL+
9 PVSSL
PVSSR 8
MS6864, TSSOP16
SCL
16
I2C clock input
Note: 1. SE: Single Ended. BTL: Bridged-Tied Load
Symbol
VSS
Pin
Description
1,2,20 Connected to ground
NC
9,12
CAP
3
No Connect
Capacitor connected
RIN
4
Right channel input
Vss
1
20
Vss
AVSS
5
Vss
2
19
SCL
OUTR-
6
CAP
3
18
SDA
PVDDR
7
RIN
4
17
LIN
OUTR+
8
AVSS
5
16
AVDD
PVSSR
10
OUTR-
6
15
OUTL-
PVDDR
7
14
PVDDL
PVSSL
11
OUTR+
8
13
OUTL+
OUTL+
13
NC
9
12
NC
PVDDL
14
PVSSR 10
11
PVSSL
OUTL-
15
AVDD
16
Negative supply voltage
SE right channel output or negative
output of BTL right channel
Positive supply voltage for right
channel of power amplifier
Positive output of BTL right channel
Negative supply voltage for right
channel of power amplifier
Negative supply voltage for left channel
of power amplifier
Positive output of BTL left channel
Positive supply voltage for left channel
of power amplifier
SE left channel output or negative
output of BTL left channel
Positive supply voltage
LIN
17
Left channel input
SDA
18
I2C data input
MS6864, SSOP20(209mils)
SCL
19
I2C clock input
Note: 1. SE: Single Ended. BTL: Bridged-Tied Load
REV 2
2/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
ORDERING INFORMATION
Package
Part number
Packaging Marking
Transport Media
16Pin TSSOP (lead free)
MS6864TGTR
MS6864G
2.5k Units Tape and Reel
16Pin TSSOP (lead free)
MS6864TGU
MS6864G
90 Units Tube
20Pin SSOP (lead free)
MS6864SSGTR
MS6864G
2k Units Tape and Reel
20Pin SSOP (lead free)
RoHS Compliance
MS6864SSGU
MS6864G
66 Units Tube
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Rating
Unit
6.5
V
2000
V
Storage temperature range
-65 to 150
℃
TA
Operating ambient temperature range
-40 to 85
℃
TJ
Maximum junction temperature
150
℃
TS
Soldering temperature, 10 seconds
Thermal resistance from junction to ambient in free air
TSSOP16 (enhanced thermal pad)
SSOP20
260
℃
51
110
℃/W
VDD
Supply voltage
VESD
Electrostatic handling
TSTG
RTHJA
OPERATING RATINGS
Symbol
VDD
Min
Typ
Max
Unit
2.4
5
6.5
V
Conditions
Min
Typ
Max
Unit
All devices are active, BTL
0.5VDD
-0.05
0.5VDD
-0.05
-
Parameter
Supply voltage
5V ELECTRICAL CHARACTERISTICS
(Ta=25℃, VDD=5V, VSS=0V, f=1kHz; unless otherwise specified)
Parameter
Symbol
DC Characteristics
VCAP
Voltage at CAP
VDC
Output DC level
IQ
Quiescent current
IPD
Power down current
ATT
Mute attenuation
GARAN
Gain/Attenuation range
REV 2
0.5VDD
0.5VDD
10
All devices are active, SE
6.7
L-ch (R-ch) PD, BTL
5.2
L-ch (R-ch) PD, SE
3.4
All devices power down
All devices power down,
except CAP=1/2 VDD
Gain
-
3/21
-77.5
-
V
V
mA
0.3
uA
12
0
Attenuation
-
0.5VDD
+0.05
0.5VDD
+0.05
-
-90
dB
21
dB
0
dB
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
GSTEP
Gain step
-
3
-
dB
ASTEP
Attenuation step
-
1.25
-
dB
EGA
Gain/Attenuation step error
-
0.3
-
dB
VI2CH
Serial interface high input level
2
VI2CL
Serial interface low input level
V
0.8
V
AC Characteristics
PSRR
CS
Power supply rejection ratio
Channel separation
THD+N
Total harmonic distortion plus
Noise
S/N
Signal-to-noise ratio
Po
Maximum output power
BTL Mode , RL=8Ω
CAP=1uF, f=200Hz
SE Mode , RL=32Ω
CAP=1uF, f=200Hz
BTL Mode, RL=8Ω
Po=1W
SE Mode, RL=32Ω
Po=60mW
-
61
-
dB
-
65
-
dB
-
78
-
dB
-
81
-
dB
-
-65
-
dB
-
0.0562
-
%
-
93
-
dB
-
2
-
W
-
1.3
-
W
-
93m
-
W
Conditions
Min
Typ
Max
Unit
All devices are active, BTL
-
9
-
SE mode, RL=32Ω, 75mW
SE mode, A-weighting,
75mW
BTL Mode, RL = 4Ω
THD+N = 1%
BTL Mode, RL = 8Ω
THD+N = 1%
SE Mode, RL = 32Ω
THD+N = 0.1%
PD: Power Down
3.3V ELECTRICAL CHARACTERISTICS
(Ta=25℃, VDD=3.3V, VSS=0V, f=1kHz; unless otherwise specified)
Parameter
Symbol
DC Characteristics
IQ
Quiescent current
All devices are active, SE
-
6
-
L-ch (R-ch) PD, BTL
-
4.6
-
L-ch (R-ch) PD, SE
-
3.0
-
-
-65
60
dB
-
0.0562
0.1
%
-
0.8
-
W
-
0.53
-
W
-
35m
-
W
mA
AC Characteristics
THD+N
Po
REV 2
Total harmonic distortion plus
Noise
SE mode, RL=32Ω, 35mW
Maximum output power
BTL Mode, RL = 4Ω
THD+N = 1%
BTL Mode, RL = 8Ω
THD+N = 1%
SE Mode, RL = 32Ω
THD+N = 0.1%
4/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
2.4V ELECTRICAL CHARACTERISTICS
(Ta=25℃, VDD=2.4V, VSS=0V, f=1kHz; unless otherwise specified)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
All devices are active, BTL
-
7.6
-
All devices are active, SE
-
5.1
-
L-ch (R-ch) PD, BTL
-
4
-
L-ch (R-ch) PD, SE
-
2.6
-
-
-65
-60
dB
-
0.0562
0.1
%
-
0.36
-
W
-
0.25
-
W
-
15m
-
W
DC Characteristics
IQ
Quiescent current
mA
AC Characteristics
THD+N
Po
REV 2
Total harmonic distortion plus
Noise
SE mode, RL=32Ω, 15mW
Maximum output power
BTL Mode, RL = 4Ω
THD+N = 1%
BTL Mode, RL = 8Ω
THD+N = 1%
SE Mode, RL = 32Ω
THD+N = 0.1%
5/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
TYPICAL PERFORMANCE CHARACTERISTICS
VDD=5V, Po=2W
BTL mode, RL=4Ω
VDD=3.3V, Po=0.8W
BTL mode, RL=4Ω
VDD=2.4V, Po=330mW
BTL mode, RL=4Ω
THD+N (%)
FREQUENCY (Hz)
THD+N vs. frequency
THD+N (%)
FREQUENCY (Hz)
THD+N vs. frequency
THD+N (%)
FREQUENCY (Hz)
THD+N vs. frequency
VDD=5V, Po=1.2W
BTL mode, RL=8Ω
VDD=3.3V, Po=0.53W
BTL mode, RL=8Ω
VDD=2.4V, Po=250mW
BTL mode, RL=8Ω
FREQUENCY (Hz)
THD+N vs. frequency
THD+N (%)
Po=25mW
VDD=3.3V, Po=35mW
SE mode, RL=32Ω
THD+N (%)
FREQUENCY (Hz)
THD+N vs. frequency
THD+N (%)
FREQUENCY (Hz)
THD+N vs. frequency
VDD=5V, Po=90mW
SE mode, RL=32Ω
REV 2
THD+N (%)
THD+N (%)
THD+N (%)
(Ta=25℃; unless otherwise specified)
VDD=2.4, Po=15mW
SE mode, RL=32Ω
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
THD+N vs. frequency
THD+N vs. frequency
THD+N vs. frequency
6/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
f=20kHz
f=20kHz
f=1kHz
f=1kHz
THD+N (%)
THD+N (%)
THD+N (%)
f=20kHz
f=1kHz
f=20Hz
f=20Hz
f=20Hz
VDD=3.3V
BTL mode
RL=4Ω
VDD=5V
BTL mode
RL=4Ω
VDD=2.4V
BTL mode
RL=4Ω
OUTPUT POWER (W)
OUTPUT POWER (W)
OUTPUT POWER (W)
THD+N vs. output power
THD+N vs. output power
THD+N vs. output power
f=20kHz
f=20kHz
f=1kHz
f=1kHz
f=1kHz
f=20Hz
THD+N (%)
THD+N (%)
THD+N (%)
f=20kHz
f=20Hz
f=20Hz
VDD=5V
BTL mode
RL=8Ω
VDD=3.3V
BTL mode
RL=8Ω
VDD=2.4V
BTL mode
RL=8Ω
OUTPUT POWER (W)
OUTPUT POWER (W)
OUTPUT POWER (W)
THD+N vs. output power
THD+N vs. output power
THD+N vs. output power
f=20kHz
f=20kHz
f=1kHz
VDD=5V
SE mode
RL=32Ω
REV 2
f=20Hz
f=1kHz
VDD=3.3V
SE mode
RL=32Ω
THD+N (%)
f=20Hz
THD+N (%)
THD+N (%)
f=20kHz
f=20Hz
f=1kHz
VDD=2.4V
SE mode
RL=32Ω
OUTPUT POWER (W)
OUTPUT POWER (W)
OUTPUT POWER (W)
THD+N vs. output power
THD+N vs. output power
THD+N vs. output power
7/21
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MS6864
Dual 2W Power Amplifiers with Volume Control
CHANNEL SEPARATION (dB)
CHANNEL SEPARATION (dB)
MOSA
VDD=5V, Po=1W
BTL, RL=8Ω
VDD=5V, Po=60mW
SE, RL=32Ω
FREQUENCY (Hz)
FREQUENCY (Hz)
Channel separation vs. frequency
Channel separation vs. frequency
CAP=10uF
CAP=10uF
CAP=1uF
PSRR (dB)
PSRR (dB)
CAP=1uF
VDD=5V,
VRR=200mVrms,
BTL RL=8Ω
VDD=5V,
VRR=200mVrms,
SE RL=32Ω
FREQUENCY (Hz)
FREQUENCY (Hz)
PSRR vs. frequency
PSRR vs. frequency
LPD or RPD
BTL
SE
QUIESCENT CURRENT (mA)
QUIESCENT CURRENT (mA)
All Devices activate.
BTL
SE
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
Quiescent current vs. supply voltage
Quiescent current vs. supply voltage
REV 2
8/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
I2C CONTROL INTERFACE
Data are transmitted to and from the MCU and MS6864 via the SDA and SCL. The SDA and SCL make up the
BUS interface. It should be noted that pull-up resistors must be connected to the positive supply voltage.
VDD
Rp
Rp
Pull up resistors
SDA (Serial Data Line)
SCL (Serial Clock Line)
MCU
MS6864
I2C interface protocol
The format consists of the following:
•A START condition
•A chip address byte including the chip address. (7bits)
•The 8th bit of the byte must be “0”.(write=0, read=1)
•The chip must always acknowledge the end of each transmitted byte.
•A data sequence (N-bytes + Acknowledge)
•A STOP condition
SDA
SCL
1-7
8
9
ADDRESS
R/W
ACK
1-7
8
9
1-7
8
9
S
P
START
CONDITION
DATA
ACK
DATA
ACK
STOP
CONDITION
I2C chip address
88H
1
0
0
0
1
7 bits address
REV 2
0
0
0
W
9/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
I2C data bytes description
MSB
LSB
Function
0
0
B2
B1
B0
A2
A1
A0
L-ch, Attenuation and Mute
0
1
B2
B1
B0
A2
A1
A0
R-ch, Attenuation and Mute
1
0
0
G2
G1
G0
0
0
L-ch, Input Gain
1
0
1
G2
G1
G0
0
R-ch, Input Gain
1
1
0
1
RPD
LPD
PDPR
0
CAP
PD
S/B
0
0
1
1
1
Where Ax = 1.25dB/step; Bx = 10dB/step; Gx = 3dB/step
0
0
Power Down Mode
Output mode (SE/BTL)
Attenuation and Mute
MSB
LSB
0
0
0
1
B2
B1
B0
L-ch, Attenuation and Mute
A2
A1
A0
0
0
0
0 dB
0
0
1
-1.25 dB
0
1
0
-2.5 dB
0
1
1
-3.75 dB
1
0
0
-5 dB
1
0
1
-6.25 dB
1
1
0
-7.5 dB
1
1
1
-8.75 dB
R-ch, Attenuation and Mute
0
0
0
0 dB
0
0
1
-10 dB
0
1
0
-20 dB
0
1
1
-30 dB
1
0
0
-40 dB
1
0
1
-50 dB
1
1
0
-60 dB
1
1
1
-70 dB
1
1
1
1
Initial state: Both L-ch and R-ch are mute-on.
REV 2
Function
1
1
10/21
Mute
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
Input Gain
MSB
Function
LSB
1
0
0
1
0
1
0
L-ch, Input Gain
0
G2
G1
G0
0
0
0
0 dB
0
0
1
3 dB
0
1
0
6 dB
0
1
1
9 dB
1
0
0
12 dB
1
0
1
15 dB
1
1
0
18 dB
R-ch, Input Gain
1
1
1
Initial state: Both L-ch and R-ch are 0dB gain.
21 dB
Power Down Mode
MSB
1
1
0
1
RPD
LSB
CAP
LPD PDPR
PD
Function
Power mode selection and power management
0
R-ch PA output is active mode
1
R-ch PA output is power down mode
0
L-ch PA output is active mode
1
L-ch PA output is power down mode
0
Disable preparation for power off
1
Enable preparation for power off
0
Set the voltage of CAP to middle of supply voltage
1
Pull down CAP pin to ground
Initial state: All are the power down modes.
Enable the power down preparation before the chip will be shut down.
Output mode (SE/BTL)
MSB
1
LSB
1
1
S/B
0
0
0
0
0
Output mode, mixer control and audio format
Output mode is BTL
1
Initial state: Output mode is BTL mode.
REV 2
Function
Output mode is SE
11/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
I2C Initial code and status
MSB
LSB
Function
Initial status
0
0
1
1
1
1
1
1
L-ch, Attenuation and Mute
Mute On
0
1
1
1
1
1
1
1
R-ch, Attenuation and Mute
Mute On
1
0
0
0
0
0
0
0
L-ch, Input Gain
0dB
1
0
1
0
0
0
0
0
R-ch, Input Gain
1
1
0
1
1
1
1
1
Power Down Mode
1
1
1
0
0
0
0
0
Output mode (SE/BTL)
0dB
All devices are
power down
BTL
I2C CODE EXAMPLE
Input gain
Set the left channel gain to be 3dB and the right channel gain to be 3dB
Gain
Start
MS6864 Address
ACK
1
0
0
0
0
1
0
0
ACK
1
0
L-ch, G = 3dB
1
0
0
1
0
0
ACK
Stop
0
ACK
Stop
R-ch, G = 3dB
The left and right input channels are independent.
Input Attenuation
Set the left channel to be -15dB and the right channel to be -30dB
-10dB
Start
MS6864 Address
ACK
0
0
0
0
-5dB
1
1
0
-30dB
0
ACK
0
1
L-ch, Att = -15dB
0
1
0dB
1
0
0
R-ch, Att = -30dB
Power down mode
Set the L-ch PA output to be active mode.
L-ch
Start
MS6864 Address
ACK
1
1
0
1
1
0
1
1
ACK
Stop
0
ACK
Stop
Left PA is active mode
Output mode
Set the output mode to be BTL mode
Output mode
Start
MS6864 Address
ACK
1
1
1
0
0
0
0
BTL mode
REV 2
12/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
OPERATION PROCEDURE
The sequence of operation: power on→ active → power down → active → power off. The basic flowcharts are as
follows:
For HP mode and HP/BTL mode
Power On
Activating
Power Down
(Shut Down)
Power Off
All the Digital Interface Signals
Pull Low
Setting Input Gain Is Fixed
Volume Down To Mute
Input Channels Mute On
Volume Down To Mute
Input Channels Mute On
I2C pull low
VDD = GND
Power On
[ Enable Input & Input Gain ]
Code: Lch 100xxx00
Rch 101xxx00
[ Attenuation and Mute ]
Code: Lch 00111111 (3Fh)
Rch 01111111 (7Fh)
Disable Power Down
Power Down Preparation
VDD = Supply voltage
[ Power Down Mode ]
Code: 11010011 (D3h)
Wait 0.5 sec
[ Power Down Mode ]
Code: 11010010 (D2h)
[ Disable Input & Gain = 0dB]
Code: Lch 10000011 (83h)
Rch 10100011 (a3h)
wait 7 sec
Default Status
[Attenuation & Mute]
Mute on (max attenuation)
[ Input Gain ]
0dB
Power Down Preparation
[ Power Down Mode ]
Code: 11010010 (D2h)
[ Disable Input & Gain = 0dB]
Code: Lch 10000011 (83h)
Rch 10100011 (a3h)
wait 7 sec
CAPPD = 0
[ Power Down Mode ]
Code: 11010010 (D2h)
Wait 0.5 sec
Power Down All The Devices
Only CAPPD Keep Activating
[ Power Down Mode ]
All are power down status
[ Output Mode]
BTL mode
[ Attenuation and Mute ]
Code: Lch 00111111 (3Fh)
Rch 01111111 (7Fh)
[ Power Down Mode ]
Code: 11011110 (DEh)
Power Down All The Devices
Pull Down CAP Pin To Ground
[ Power Down Mode ]
Code: 11011111 (DFh)
PDPR = 0
[ Power Down Mode ]
Code: 11010000 (D0h)
Wait 0.5 sec
Keep All The Digital Interface
Signals Unchanged
All The Digital Interface Signals
Pull Low
I2C pull low
Mute Off And Volume Up/Down
Step By Step
Power Off
[ Attenuation and Mute ]
Code: Lch 00xxxxxx
Rch 01xxxxxx
REV 2
Disconnect VDD
VDD will be fell down to 0V
13/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
For BTL mode only
REV 2
14/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
APPLICATION INFORMATION
A base application circuit
MS6864
2.4~6.5V
Supply
13
1uF
0.1uF
1uF
MCU
4
2
AVDD
AVSS
CAP
16
SCL
15
SDA
1
VSS
PVDDL
PVSSL
11
9
PVSSR
8
PVDDR
6
2.4~6.5V
Power Amplifier Supply
1uF
1uF
VDD
100k
100k
MCU
HP_sense
1uF
10uF
100uF
14
R channel
RIN
OUTR-
12
OUTR+
10
10uF
L channel
REV 2
3
RL
8Ω
1k
Headphone Jack
100uF
LIN
OUTL-
5
OUTL+
7
15/21
RL
8Ω
1k
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
Output mode operation -- SE mode and BTL mode
The output has two modes, SE mode and BTL mode. The mode is selected by I2C code via MCU.
In BTL mode, the outputs of A1(B1) and A2(B2) are then used to drive the speakers(4Ω/8Ω).
A1
OUTR-
-1
RL
4Ω / 8Ω
A2
-1
OUTR+
B1
OUTL-
-1
RL
4Ω / 8Ω
B2
-1
OUTL+
I2C
Interface
SCL SDA
In the SE mode, the amplifiers A2 and B2 are shutdown, and become the high output impedance states.
A1
OUTR-
-1
100uF
1k
Headphone
Jack
RL
16Ω / 32Ω
A2
-1
Shutdown
B1
OUTL-
-1
100uF
1k
B2
-1
Shutdown
I2C
Interface
SCL SDA
Headphone sense
The output mode is SE or BTL that is decided by a headphone. It has to be set SE mode when a headphone is plug-in
status. The output mode is selected by I2C command code by MCU. Please note that the MS6864 don’t detect a
headphone automatically. Thus a detect function is executed via MCU. An operation diagram is shown as follows:
The HP_sense pin is high when a headphone is plug-in.
The HP_sense pin is low when a headphone is not plug-in.
REV 2
16/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
EXTERNAL DIMENSIONS
TSSOP16 (Thermal Pad)
D
D2
Detail A
E2
E1 E
C
A2
A
A1
B
e
L
y
L1
Dimension in mm
Dimension in inches
Symbol
Min
Nom
Max
Min
Nom
Max
A
-
-
1.2
-
-
0.047
A1
0.00
-
0.15
0.000
-
0.006
A2
0.80
1.00
1.05
0.031
0.039
0.041
0.012
b
0.19
-
0.30
0.007
-
C
0.09
-
0.20
0.004
-
0.008
D
4.90
5.00
5.10
0.193
0.197
0.201
D2
2.4
3
0.094
E
6.4 BSC
E1
4.30
E2
2.4
e
REV 2
4.40
0.118
0.252 BSC
4.50
0.169
3
0.094
0.65 BSC
0.173
0.177
0.118
0.0256 BSC
L
0.45
0.60
0.75
0.018
0.024
0.030
L1
0.90
1.00
1.10
0.035
0.039
0.043
θ
0
-
8
0
-
8
y
-
-
0.10
-
-
0.004
o
o
17/21
o
o
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
SSOP20 (209mil)
Dimension in mm
Dimension in inches
Symbol
Min
Nom
Max
Min
Nom
Max
A
-
-
2
-
-
0.079
A1
0.05
-
-
0.002
-
-
A2
1.65
1.75
1.85
0.065
0.069
0.073
b
0.22
0.3
0.33
0.009
0.012
0.013
C
0.09
0.15
0.21
0.004
0.006
0.008
D
6.9
7.2
7.5
0.272
0.283
0.295
E
7.4
7.8
8.2
0.291
0.307
0.323
E1
5
5.3
5.6
0.197
0.209
0.220
e
L
0.650 BASIC
0.55
L1
REV 2
0.75
0.026 BASIC
0.95
0.022
1.25 REF.
0.03
0.038
0.049 REF.
R1
0.09
-
-
0.004
-
-
θ
0
4
8
0
4
8
18/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
DEMO BOARD
3
1
4
6
2
5
Function description
Label 1: Supply Input
Supply voltage range is 2.4V to 6.5V.
Label 2: Reset
All I/O pins are reset to default values.
Label 3: Headphone Jack
Used 3.5mm diameter of headphone with 32ohm
Label 4: Speaker Output
Connected to speaker with 8ohm or 4 ohm
Label 5: Signal Input
Connected to audio signals.
Label 6: LED Indicator
The LEDs indicate the chip status and IR received status.
Power ON status, it is green-dark blink twice and then keeps on a light state.
Power OFF status, it is green-dark blink four times and then keeps on a dark state.
It is green-dark blink once when the MCU has received the function code correctly.
SE mode and BTL mode operation
The headphone controls operational mode. System enters SE mode when headphone jack is empty.
When a set of headphone plugged into the jack, the system switched to BTL mode.
REV 2
19/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
IR Controller
Power ON/OFF : The power key.
Press the key once to set power-on or power-off for MS6864.
The default values are GAIN 0dB, ATTENUATION –20dB and MUTE-ON.
VOL+, VOL- : The volume control keys.
The volume control in 1.25dB/step as the switch is pressed once, the range is -77.5dB to 0dB.
Gain+, Gain- : The gain control keys.
The gain control in 3dB/step as the switch is pressed once, the range is 0dB to 21dB.
Mute : The mute key
Press the key once to set mute-on or mute-off.
PD/Active : The power down key.
Press the key once to set power-down or activation for MS6864.
REV 2
20/21
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MS6864
MOSA
Dual 2W Power Amplifiers with Volume Control
Circuit
J1
DVDD
R1
1
2
+
+
DVDD
C3
0.1u
S1
+ C2
10u
C4
1u
U1
RST
R4
1
2
3
4
5
IR_IN 6
SCL
7
8
SDA
HP_IN 9
10
10K
20P
2
+
C6
20P
3
+
C7
1
Y1
24M
W1
JUMP
DGND
Q2
J2
AVCC
RST
P3.0
P3.1
XTAL2
XTAL1
P3.2
P3.3
P3.4
P3.5
GND
C8
0.1u
1
47u
2
3
VS
GND
IR
IR
D1
POWER
+ C5
470P
DGND
1
R5
NMOS
+
AVCC
Q1
C1 +
IR_IN
20
19
18
17
16
15
14
13
12
11
Vcc
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
P3.7
R2
10K
AT89C4051
2
1
2
R3
1K
220
100K
+ 1u
+
C10
C9
1u
AGND
J6
1
2
R6
C11
INR
R
L
G
C12
1
2
3
4
5
6
7
8
10u
+
C13
10u
+
INPUT
L1INL
1
2
3
U2
+
J3
R8 R7
1K 1K
100K
1u
SP1
SPK_R
C14
100u
+
+
Vss
SCL
CAP
SDA
RIN
LIN
AVss
AVDD
-OUTR
-OUTL
PVDDR PVDDL
+OUTR +OUTL
PVSSR PVSSL
16 SCL
15 SDA
14
13 AVCC
12
11
10
9
+
MS6864
C16
1u
SP2
SPK_L
+
C17 C18
1u 1u
+
C15
100u
1
2
3
4
5
6
R9
1K
R10
1K
HP-IN
HP-R
R
HP-L
L
G
HEADPHONE
J5
1
2
3
OUT
W2
Jumper
AGND
REV 2
AGND
DGND
21/21
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