MOSA MS6901_1

MOSA
MS6901
Mono 1.1W Power Amplifier with Shutdown Selection
Mono 1.1W Power Amplifier
Selectable Shutdown Logic Level
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 MSOP10, enhance thermal pad
‧Portable electronic devices
‧PDAs
‧Communication headsets
‧Cross-reference:
LM4901
DESCRIPTION
The MS6901 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 shutdown may be
enabled by either logic high or logic low that depending on shutdown mode selection. The BTL configuration
eliminates the need for external coupling capacitors on the output in most applications. The MS6901 is unity-gain
stable and can be configured by external gain-setting resistors.
The MS6901 has good feature for portable equipment, these features include the low voltage operation, micropower
consumption shutdown mode, enhance thermal pad and small package MSOP10, make the MS6901 ideally suited for
use in portable electronic equipments.
BLOCK DIAGRAM
-IN
+IN
5
-
4
+
-
A1
BP
2
SD
SD Mode
1
3
VDD
8
GND
REV 1
+
Bias
control
A2
6
+ 10
Vo1
Vo2
-
7, 9
1/9
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MOSA
MS6901
Mono 1.1W Power Amplifier with Shutdown Selection
PIN CONFIGURATION
Symbol
Pin
Description
SD
1
Shutdown places the entire device in shutdown mode depending on SD Mode selection.
TTL compatible input.
SD Mode = 0, the device entries shutdown when SD is logic low.
SD Mode = 1, the device entries shutdown when SD is logic high.
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.
SD Mode
3
The shutdown mode controls the shutdown logic level of the SD pin1.
TTL compatible input
+IN
4
Non-inverting input
-IN
5
Inverting input
Vo1
6
BTL negative output
GND
7
Ground
VDD
8
Supply voltage
GND
9
Ground
Vo2
10
BTL positive output
MSOP10
SD
1
10
Vo2
BP
2
9
GND
SD Mode
3
8
VDD
+IN
4
7
GND
-IN
5
6
Vo1
Thermal
Pad
ORDERING INFORMATION
Package
Part number
Packaging Marking
Transport Media
10-Pin MSOP (lead free)
MS6901MGTR
6901G
3.5k Units Tape and Reel
10-Pin MSOP (lead free)
RoHS Compliance
MS6901MGU
6901G
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
MSOP10 (enhance thermal pad)
50
REV 1
2/9
℃/W
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MOSA
MS6901
Mono 1.1W Power Amplifier with Shutdown Selection
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
[email protected]=0V
-
0.1
-
uA
VSDH
Shutdown input voltage high
2.0
-
-
V
VSDL
Shutdown input voltage low
-
-
0.8
V
VSDMH
SD Mode input voltage high
2.0
-
-
V
VSDML
SD Mode 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
S/N
Signal-to-noise ratio
RL=8Ω, 1.1W
Po
Output power
RL=8Ω, THD+N = 1%
-
0.2
0.316
%
90
103
-
dB
-
1.1
-
W
Min
Typ
Max
Unit
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
[email protected]=0V
RL=8Ω, CBP=1uF, f=217Hz
-
60
-
dB
THD+N
Total harmonic distortion plus
noise
RL=8, 0.4W
-
-54
-50
dB
0.2
0.316
%
S/N
Signal-to-noise ratio
RL=8Ω, 0.4W
Po
Output power
RL=8Ω, THD+N = 1%
90
100
-
dB
-
0.4
-
W
Min
Typ
Max
Unit
2.5V ELECTRICAL CHARACTERISTICS
Ta = 25°C, VDD=2.5V, f=1kHz, BW<30kHz, unless otherwise specified.
Symbol
Parameter
Conditions
IQ
Quiescent current
VIN=0V, IO=0A
-
2.2
-
mA
ISD
Shutdown current
-
0.1
-
uA
PSRR
Power supply rejection ratio
[email protected]=0V
RL=8Ω, CBP =1uF, f=217Hz
THD+N
Total harmonic distortion plus
noise
RL=8Ω, 0.2W
S/N
Signal-to-noise ratio
RL=8Ω, 0.2W
Po
Output power
RL=8Ω, THD+N = 1%
REV 1
3/9
-
60
-
dB
-
-53
-50
dB
-
0.22
0.316
%
90
98
-
dB
-
0.2
-
W
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MOSA
MS6901
Mono 1.1W Power Amplifier with Shutdown Selection
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 1
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
4/9
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MOSA
MS6901
Mono 1.1W Power Amplifier with Shutdown Selection
QUIESCENT CURRENT (mA)
VIN=0V
No load
SUPPLY VOLTAGE (V)
Quiescent current vs. supply voltage
APPLICATION INFORMATION
Basic application example
20k
RF
0.39uF
20k
RI
VIN
5
-IN
4
+IN
+
Vo1
A1
6
RL
8Ω
1uF
MCU
VDD
2
BP
1
3
SD
SD Mode
100k
8
1uF
7, 9
Fig.1
VDD
+
A2
Vo2
10
+
Bias
control
GND
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).
REV 1
5/9
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MOSA
MS6901
Mono 1.1W Power Amplifier with Shutdown Selection
Shutdown Control
The shutdown may be enabled by either logic high or logic low that depending on shutdown mode selection. Both the
SD pin and the SD Mode pin are TTL compatible input. The SD Mode is logic low, the device entries shutdown when
SD is logic low. The SD Mode is logic high, the device entries shutdown when SD is logic high.
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 MS6901 requires special attention
on thermal design. The thermal pad on the bottom of the MS6901 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 1
6/9
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MOSA
MS6901
Mono 1.1W Power Amplifier with Shutdown Selection
EXTERNAL DIMENSIONS
MSOP10 (Thermal Pad)
Thermal Pad
Symbol
A
A1
A2
b
c
D
H
E
W1
H
W2
E
e
L
θ
W1
W2
Dimension in mm
Min
Nom
0.81
0.05
0.76
0.15
0.13
2.90
4.70
2.90
0.92
0.86
0.20
0.15
3.00
4.90
3.00
0.50 BASIC
0.40
0.53
0o
1.27
1.02
-
Dimension in inches
Max
Min
1.12
0.15
0.97
0.30
0.23
3.10
5.10
3.10
0.032
0.002
0.030
0.006
0.005
0.114
0.185
0.114
0.66
6o
1.52
1.27
Nom
Max
0.036
0.044
0.006
0.034
0.038
0.008
0.012
0.006
0.009
0.118
0.122
0.193
0.201
0.118
0.122
0.02 BASIC
0.016
0.021
0.026
0o
6o
0.050
0.060
0.040
0.050
D
A
A2
θ
e
A1
L
B
C
TAPE AND REEL (Unit : mm)
MSOP10
2.0
0.30
0.05
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
REV 1
7/9
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MOSA
MS6901
Mono 1.1W Power Amplifier with Shutdown Selection
Demoboard
1
4
5
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 mode selection (SD Mode)
The shutdown mode is low logic level shutdown mode when the jump is placed left position (SD), the SD Mode is
connected to GND. On the other hand , the chip is high logic level shutdown mode when the jump is placed right
position (SD), the SD Mode is connected to VDD.
Label 5: Shutdown pin (SD pin)
The shutdown may be enabled by either logic high or logic low that depending on shutdown mode selection. The SD
Mode is placed left position (SD), the chip entries shutdown when SD pin is placed left position (L), the SD Mode is
connected to GND. On the other hand, the SD Mode is placed right position (SD), the chip entries shutdown when
SD pin is placed right position (H), the SD Mode is connected to VDD.
REV 1
8/9
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MOSA
MS6901
Mono 1.1W Power Amplifier with Shutdown Selection
Circuit:
J1
AVDD
1
2
+ C2
1u
C1
AVDD
0.1u
J2
U1
1
2
3
1
2
3
4
5
SD
J3
SD
Vo2
BP
GND
SDM VDD
+IN GND
-IN
Vo1
10
9
8
7
6
LS1
SPEAKER
MS6901
1
2
3
R1
20K
SD Mode
J4
C4
R2
+ C3
1u
0.39u
+
1
2
20K
IN
REV 1
9/9
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