MOSA MS6890MGTR Mono 1.1w power amplifier low voltage operation Datasheet

MOSA
MS6890
Mono 1.1W Power Amplifier with Shutdown
Mono 1.1W Power Amplifier
Low Voltage Operation
FEATURES
APPLICATIONS
‧Operation range: 2.5V ~ 6.5V
‧Shutdown Current 0.1uA at 5V
‧PSRR at 217Hz, 60dB at 5V
‧Output power, THD+N=1%
RL=8Ω, 1.1W at 5V, 0.4W at 3.3V, 200mW at 2.5V
‧Unity-gain stable
‧Space-saving SOP8, MSOP8 and enhance thermal pad
‧Portable electronic devices
‧PDAs
‧Communication headsets
‧Cross-reference:
LM4890, LM4893, TS4890
TPA751, MAX9716
DESCRIPTION
The MS6890 is a low distortion power amplifier that can drive 1.1W 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 MS6890 is unity-gain
stable and can be configured by external gain-setting resistors.
The MS6890 has good feature for portable equipment, these features include the low voltage operation, micropower
consumption shutdown mode, enhance thermal pad and small package SOP8, MSOP8, make the MS6890 ideally
suited for use in portable electronic equipments.
BLOCK DIAGRAM
-IN
+IN
4
-
3
+
A1
-
REV 4
BP
2
SHDN
1
VDD
6
GND
7
+
A2
-
5
Vo1
+
8
Vo2
Bias
control
1/10
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MOSA
MS6890
Mono 1.1W Power Amplifier with Shutdown
PIN CONFIGURATION
Symbol
Pin
Description
/SHDN
1
/Shutdown places the entire device in shutdown mode when held low.
TTL compatible input.
BP
2
Bypass is the cap to the voltage divider for internal mid-supply bias.
This terminal should be connected to a 0.1-μF to 10-μF capacitor CBP.
+IN
3
Non-inverting input
-IN
4
Inverting input
Vo1
5
BTL negative output
VDD
6
Supply voltage
GND
7
Ground
Vo2
8
BTL positive output
SOP8, MSOP8
SHDN 1
BP 2
+IN 3
8 Vo2
Thermal
Pad
-IN 4
7 GND
6 VDD
5 Vo1
ORDERING INFORMATION
Package
8-Pin SOP (lead free)
Part number
MS6890GTR
Packaging Marking
6890G
Transport Media
2.5k Units Tape and Reel
8-Pin SOP (lead free)
MS6890GU
6890G
100 Units Tube
8-Pin MSOP (lead free)
MS6890MGTR
6890G
3.5k Units Tape and Reel
8-Pin MSOP (lead free)
RoHS Compliance
MS6890MGU
6890G
80 Units Tube
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Rating
Unit
6.5
V
3500
VDD
Supply voltage
VESD
Electrostatic handling
TSTG
Storage temperature range
-65 to 150
V
℃
TA
Operating ambient temperature range
-40 to 85
℃
TJ
Maximum junction temperature
150
℃
TS
Soldering temperature, 10 seconds
260
℃
RTHJA
Thermal resistance from junction to ambient in free air
SOP8 (enhance thermal pad)
MSOP8 (enhance thermal pad)
50
50
℃/W
REV 4
2/10
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MOSA
MS6890
Mono 1.1W Power Amplifier with Shutdown
OPERATING RATINGS
Symbol
VDD
Parameter
Supply voltage
Min
Typ
Max
Unit
2.5
5
6.5
V
Min
Typ
Max
Unit
5V ELECTRICAL CHARACTERISTICS
Ta = 25°C, VDD=5V, f=1kHz, BW<30kHz, unless otherwise specified.
Symbol
Parameter
Conditions
IQ
Quiescent current
VIN=0V, IO=0A
-
2.7
-
mA
ISHDN
Shutdown current
VSHDN=0V
-
0.1
-
uA
VSDH
Shutdown input voltage high
2.0
-
-
V
VSDL
Shutdown input voltage low
-
-
0.8
V
PSRR
Power supply rejection ratio
RL=8Ω, CBP=1uF, f=217Hz
-
60
-
dB
THD+N
Total harmonic distortion plus
noise
RL=8Ω, 1.1W
-
-54
-50
dB
-
0.2
0.316
%
S/N
Signal-to-noise ratio
RL=8Ω, 1.1W
90
103
-
dB
Output power
RL=8Ω, THD+N = 1%
-
1.1
-
W
Min
Typ
Max
Unit
Po
3.3V ELECTRICAL CHARACTERISTICS
Ta = 25°C, VDD=3.3V, f=1kHz, BW<30kHz, unless otherwise specified.
Symbol
Parameter
Conditions
IQ
Quiescent current
VIN=0V, IO=0A
-
2.4
-
mA
ISD
Shutdown current
-
0.1
-
uA
PSRR
Power supply rejection ratio
VSHDN=0V
RL=8Ω, CBP=1uF, f=217Hz
THD+N
Total harmonic distortion plus
noise
RL=8, 0.4W
S/N
Signal-to-noise ratio
RL=8Ω, 0.4W
Po
Output power
RL=8Ω, THD+N = 1%
-
60
-
dB
-
-54
-50
dB
0.2
0.316
%
90
100
-
dB
-
0.4
-
W
2.5V ELECTRICAL CHARACTERISTICS
Ta = 25°C, VDD=2.5V, f=1kHz, BW<30kHz, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
IQ
Quiescent current
VIN=0V, IO=0A
-
2.2
-
mA
ISD
Shutdown current
-
0.1
-
uA
PSRR
Power supply rejection ratio
VSHDN=0V
RL=8Ω, CBP =1uF, f=217Hz
-
60
-
dB
THD+N
Total harmonic distortion plus
noise
RL=8Ω, 0.2W
-
-53
-50
dB
S/N
Signal-to-noise ratio
RL=8Ω, 0.2W
Po
Output power
RL=8Ω, THD+N = 1%
REV 4
3/10
-
0.22
0.316
%
90
98
-
dB
-
0.2
-
W
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MOSA
MS6890
Mono 1.1W Power Amplifier with Shutdown
TYPICAL PERFORMANCE CHARACTERISTICS
Ta = 25°C, BW<30kHz, unless otherwise specified.
VDD=3.3V
RL=8Ω
Po=0.2W
FREQUENCY (Hz)
FREQUENCY (Hz)
THD+N vs. frequency
THD+N vs. frequency
f=20kHz
f=20kHz
f=1kHz
f=1kHz
f=1kHz
f=20Hz
f=20Hz
THD+N (%)
f=20kHz
THD+N (%)
THD+N (%)
FREQUENCY (Hz)
THD+N vs. frequency
VDD=5V
RL=8Ω
VDD=3.3V
RL=8Ω
f=20Hz
VDD=2.5V
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
VDD=5V
RL=8Ω
PSRR (dB)
CBP=1uF
PSRR (dB)
CBP=1uF
PSRR (dB)
CBP=1uF
REV 4
Po=0.4W
THD+N (%)
Po=1.1W
VDD=2.5V
RL=8Ω
THD+N (%)
THD+N (%)
VDD=5V
RL=8Ω
VDD=3.3V
RL=8Ω
VDD=2.5V
RL=8Ω
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
PSRR vs. frequency
PSRR vs. frequency
PSRR vs. frequency
4/10
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MOSA
MS6890
Mono 1.1W Power Amplifier with Shutdown
QUIESCENT CURRENT (mA)
VIN=0V
No load
SUPPLY VOLTAGE (V)
Quiescent current vs. supply voltage
REV 4
5/10
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MOSA
MS6890
Mono 1.1W Power Amplifier with Shutdown
APPLICATION INFORMATION
Basic application example
20k
RF
0.39uF
20k
RI
VIN
4
-IN
3
+IN
+
Vo1
A1
5
-
RL
8Ω
1uF
MCU
VDD
1uF
2
BP
1
SHDN
6
VDD
7
GND
Fig.1
+
A2
Vo2
8
+
Bias
control
A audio amplifier application circuit.
External gain-setting
As shown in Fig.1, The amplifier A1 is independent amplifiers with an externally configured gain of AV = - RF/RI. The
amplifier A2 is a closed-loop gain of AV = -1 fixed by two internal resistors. The outputs of A1 and A2 are used to drive
the mono bridged-tied load (BTL).
High Pass Filter
The input capacitor CIN and resister RIN are decided the cut-off frequency of the HPF. The equation is as follows:
fcut-off = 1 / (2π*RIN *CIN)
Thermal pad considerations
The thermal pad must be connected to ground. The package with thermal pad of the MS6890 requires special attention
on thermal design. The thermal pad on the bottom of the MS6890 should be soldered down to a copper pad on the
circuit board. Heat can be conducted away from the thermal pad through the copper plane to ambient. If the copper
plane is not on the top surface of the circuit board, 9 vias of 13 mil or smaller in diameter should be used to thermally
couple the thermal pad to the bottom plane. For good thermal conduction, the vias must be plated through and solder
filled.
REV 4
6/10
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MOSA
MS6890
Mono 1.1W Power Amplifier with Shutdown
EXTERNAL DIMENSIONS
SOP8 (Thermal Pad)
Symbol
W1
H
A
A1
B
C
D
H
E
e
L
W1
W2
W2
E
Dimension in mm
Min
Max
1.35
1.75
0.10
0.25
0.33
0.51
0.19
0.25
4.80
5.00
5.80
6.20
3.80
4.00
1.27 BSC
0.40
1.27
2.159
2.413
2.159
2.413
Dimension in inch
Min
Max
0.0532 0.0688
0.0040 0.0098
0.013
0.020
0.0075 0.0098
0.1890 0.1968
0.2284 0.2440
0.1497 0.1574
0.050 BSC
0.016
0.050
0.085
0.095
0.085
0.095
D
L
A
A1
e
B
C
MSOP8 (Thermal Pad)
W1
Symbol
H
A
A1
A2
B
C
D
H
E
e
L
W1
W2
W2
E
Thermal Pad
D
A
Dimension in mm Dimension in inch
Min
Max
Min
Max
0.81
1.12
0.032
0.048
0.05
0.15
0.002
0.006
0.76
0.86
0.030
0.038
0.28
0.38
0.011
0.015
0.13
0.23
0.005
0.009
2.90
3.10
0.114
0.122
4.70
5.10
0.185
0.201
2.90
3.10
0.114
0.122
0.65
0.026
0.40
0.66
0.016
0.026
1.27
1.52
0.050
0.060
1.02
1.27
0.040
0.050
A2
A1
e
L
B
C
Note : Die pad exposure size is according to lead frame design.
REV 4
7/10
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MOSA
MS6890
Mono 1.1W Power Amplifier with Shutdown
TAPE AND REEL (Unit : mm)
2.0
0.05
0.30
0.05
1.5+0.1/-0.0 DIA
4.0
1.75
0.3R MAX
5.5
0.05
12.0 0.3
5.4
3.0
3.6
8.0
1.5 MIN
6.9
0.5 Radius Typical
2.0 1.7
SOP8
2.0
0.30
0.05
0.05
1.5+0.1/-0.0
4.0
1.75
0.3R MAX
5.5
0.05
12.0 0.3
3.3
5.2
8.0
1.5 MIN
0.3 Typical
4.2
3.4
1.6 1.2
MSOP8
REV 4
8/10
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MOSA
MS6890
Mono 1.1W Power Amplifier with Shutdown
DEMO BOARD
4
1
3
2
Function description
Label 1: Supply Voltage
Supply voltage range is 2.5V to 6.5V, the left of jump is positive and the right of jump is negative.
Label 2: Signal Input
Connected to audio signals.
Label 3: Speaker Output
Connected to speaker with 8ohm or 4 ohm
Label 4: Shutdown Control
The system is active mode when the jump is placed left, the shutdown pin of MS6890 is connected to GND.
The system enters shutdown mode when the jump is placed right, the shutdown pin of MS6890 is connected to VDD.
REV 4
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MOSA
MS6890
Mono 1.1W Power Amplifier with Shutdown
Circuit
JP1
1
2
C1
AVDD
+ C2
1u
R3
100K
0.1u
J1
U1
1
2
3
1
2
3
4
SD
SD
BP
+IN
-IN
Vo2
GND
VDD
Vo1
MS6890
R6
20K
1
2
C7
0.39u
20K
LS1
SPEAKER
R5
+ C4
1u
+
JP3
L2
+IN_J
8
7
6
5
-IN
REV 4
10/10
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