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MOSA
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
Mono 1.9W / Stereo 300mW Power Amplifier Low Voltage Operation, Pop Noise Free
FEATURES
Operation range: 2.7V~5.5V Shutdown Current 18uA at 5V Output power, THD+N=1% BTL, RL=3, 2.1W at 5V BTL, RL=4, 1.9W at 5V, 0.83W at 3.3V, 500mW at 2.7V BTL, RL=8, 1.2W at 5V, 0.54W at 3.3V, 350mW at 2.7V SE, RL=8, 300mW at 5V, 125mW at 3.3V, 85mW at 2.7V SE, RL=32, 90mW at 5V, 43mW at 3.3V, 25mW at 2.7V Headphone sense Unity-gain stable, pop noise free Space-saving MSOP10 (enhance thermal pad), TSSOP14
APPLICATIONS
Desktop computer's sound card Portable audio devices PDA's Handheld games Communication headsets Cross-reference: SSM2250, LM4853
DESCRIPTION
The MS6853 is a low distortion power amplifier that can drive a set of 1.9W of continuous average power into a mono 4 bridged-tied load (BTL) or 2 * 90mW into stereo 32 single ended (SE) loads headphone. It can automatically switch between mono 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 MS6853's gain is set by external gain-setting resistors. The MS6853 has good feature for portable equipment, these features include the low voltage operation, micropower consumption shutdown mode, enhance thermal pad and small package MSOP10, TSSOP14, make the MS6853 ideally suited for use in portable digital audio equipments.
BLOCK DIAGRAM
VDD L-IN + A1
L-OUT / BTL OUT-
BYPASS + A2 VDD R-OUT Mono / Stereo Mode Switching Circuitry BTL OUT+
R-IN
+
A3
HP-IN
VDD GND
Click/Pop Reduction Bias
SHUTDOWN
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PIN CONFIGURATION
Symbol L-IN SHUTDOWN HP-IN GND R-IN R-OUT BY PASS BTL OUT+ VDD L-OUT/BTL OUTnc MSOP10 TSSOP14 Pin Pin 1 2 2 3 4 5 6 7 8 9 10 3 4 5 6 9 10 11 12 13 1,7,8,14 Left channel input
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
Description SHUTDOWN places the entire device in shutdown mode when held high. TTL compatible input. Headphone input detection. A logical low sets BTL mode, a logical high sets SE mode. Ground Right channel input Right channel output BYPASS is the cap to the voltage divider for internal mid-supply bias. This terminal should be connected to a 0.1-F to 10-F capacitor CBP. Bridged-tied load positive output Supply voltage Left channel output or bridged-tied load negative output No connected TSSOP14
MSOP10
nc
L-IN SHUTDOWN HP-IN GND R-IN 1 2 3 4 5 MS6853 Thermal Pad 10 9 8 7 6 L-OUT / BTL OUTVDD BTL OUT + BYPASS R-OUT
1 2 3 4 5 6 7 MS6853
14 13 12 11 10 9 8
nc L-OUT / BTL OUTVDD BTL OUT + BYPASS R-OUT nc
L-IN SHUTDOWN HP-IN GND R-IN nc
ORDERING INFORMATION
Package 10-Pin MSOP 10-Pin MSOP 10-Pin MSOP (lead free) 10-Pin MSOP (lead free) 14Pin TSSOP 14Pin TSSOP 14Pin TSSOP (lead free) 14Pin TSSOP (lead free) Part number MS6853MTR MS6853MU MS6853MGTR MS6853MGU MS6853TTR MS6853TU MS6853TGTR MS6853TGU Packaging Marking 6853 6853 6853G 6853G MS6853 MS6853 MS6853G MS6853G Transport Media 3.5k Units Tape and Reel 80 Units Tube 3.5k Units Tape and Reel 80 Units Tube 2.5Units Tape and Reel 98Units Tube 2.5Units Tape and Reel 98Units Tube
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MOSA
ABSOLUTE MAXIMUM RATINGS
Symbol VDD VESD TSTG TA TJ TS RTHJA Supply voltage Electrostatic handling Storage temperature range Operating ambient temperature range Maximum junction temperature Soldering temperature, 10 seconds Thermal resistance from junction to ambient in free air MSOP10 (enhance thermal pad) TSSOP14 Parameter
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
Rating 6 3500 -65 to 150 -40 to 85 150 260 50 150
Unit V V /W
OPERATING RATINGS
Symbol VDD Supply voltage Parameter Min 2.7 Typ 5 Max 5.5 Unit V
5V ELECTRICAL CHARACTERISTICS
Ta = 25C, VDD=5V, f=1kHz, BW<30kHz, unless otherwise specified. Symbol Parameter Conditions IQ ISD VSDH VSDL CS Quiescent current Shutdown current Shutdown input voltage high Shutdown input voltage low Channel separation SE Mode, RL=32 BTL Mode , RL=8 CBP=1uF, f=100Hz SE Mode , RL=32 CBP =10uF, f=100Hz SE mode, RL=32, 60mW SE mode, A-weighting BTL Mode, RL = 3 THD+N = 1% BTL Mode, RL = 4 THD+N = 1% Po Output power BTL Mode, RL = 8 THD+N = 1% SE Mode, RL =8 THD+N = 1% SE Mode, RL = 32 THD+N = 1%
REV 1.1 3
Min 2.0 100 90 -
Typ 2.4 1.6 18 110 73 64 -73 0.022 95 2.1 1.9 1.2 300m 90m
Max 0.8 -68 0.04 -
Unit mA mA uA V V dB dB dB dB % dB W W W W W
BTL Mode, VIN=0V, IO=0A SE Mode, VIN=0V, IO=0A SD Mode, VSD=VDD
PSRR
Power supply rejection ratio
THD+N S/N
Total harmonic distortion plus noise Signal-to-noise ratio
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3.3 V ELECTRICAL CHARACTERISTICS
Ta = 25C, VDD=3.3V, f=1kHz, BW<30kHz, unless otherwise specified. Symbol Parameter Conditions IQ ISD CS Quiescent current Shutdown current Channel separation
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
Min 100 89 -
Typ 2.1 1.5 12 110 73 67 -70 0.032 94 0.83 0.54 125m 43m
Max -65 0.056 -
Unit mA mA uA dB dB dB dB % dB W W W W
BTL Mode, VIN=0V, IO=0A SE Mode, VIN=0V, IO=0A SD Mode, VSD=VDD SE Mode, RL=32 BTL Mode , RL=8 CBP=1uF, f=100Hz SE Mode , RL=32 CBP =10uF, f=100Hz SE mode, RL=32, 25mW SE mode, A-weighting BTL Mode, RL = 4 THD+N = 1% BTL Mode, RL = 8 THD+N = 1% SE Mode, RL =8 THD+N = 1% SE Mode, RL = 32 THD+N = 1%
PSRR
Power supply rejection ratio
THD+N S/N
Total harmonic distortion plus noise Signal-to-noise ratio
Po
Output power
2.7 V ELECTRICAL CHARACTERISTICS
Ta = 25C, VDD=2.7V, f=1kHz, BW<30kHz, unless otherwise specified. Symbol Parameter Conditions IQ ISD CS Quiescent current Shutdown current Channel separation BTL Mode, VIN=0V, IO=0A SE Mode, VIN=0V, IO=0A SD Mode, VSD=VDD SE Mode, RL=32 BTL Mode , RL=8 CBP =1uF, f=100Hz SE Mode , RL=32 CBP =10uF, f=100Hz SE mode, RL=32, 15mW SE mode, A-weighting BTL Mode, RL = 4 THD+N = 1% BTL Mode; RL = 8 THD+N = 1% SE Mode; RL = 8 THD+N = 1% SE Mode; RL = 32 THD+N = 1%
REV 1.1 4
Min 100 87 -
Typ 2 1.4 7.5 110 73 67 -69 0.036 92 0.51 0.35 85m 25m
Max -64 0.063 -
Unit mA mA uA dB dB dB dB % dB W W W W
PSRR
Power supply rejection ratio
THD+N S/N
Total harmonic distortion plus noise Signal-to-noise ratio
Po
Output power
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TYPICAL PERFORMANCE CHARACTERISTICS
Ta = 25C, BW<30kHz, unless otherwise specified.
VDD=5V BTL mode RL=4 VDD=3.3V BTL mode RL=4
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
VDD=2.7V BTL mode RL=4
THD+N (%)
FREQUENCY (Hz)
FREQUENCY (Hz)
THD+N (%)
THD+N (%)
Po=1.9W
Po=0.8W
Po=0.5W
FREQUENCY (Hz)
THD+N vs. frequency
THD+N vs. frequency
THD+N vs. frequency
VDD=5V BTL mode RL=8 Po=1.2W
VDD=3.3V BTL mode RL=8 Po=0.5W
VDD=2.7V BTL mode RL=8 Po=0.34W
THD+N (%)
Po=1W
Po=0.3W
THD+N (%)
THD+N (%)
Po=0.25W
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
THD+N vs. frequency
THD+N vs. frequency
THD+N vs. frequency
VDD=5V SE mode RL=32
VDD=3.3V SE mode RL=32
VDD=2.7V SE mode RL=32 Po=25mW
Po=90mW
Po=25mW
THD+N (%)
Po=60mW
THD+N (%)
THD+N (%)
Po=35mW
Po=15mW
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
THD+N vs. frequency
THD+N vs. frequency
THD+N vs. frequency
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MOSA
f=20kHz f=20kHz
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
f=20kHz
THD+N (%)
THD+N (%)
f=1kHz
THD+N (%)
f=1kHz
f=1kHz VDD=5V BTL mode RL=4 f=20Hz
VDD=3.3V BTL mode RL=4 f=20Hz
VDD=2.7V BTL mode RL=4 f=20Hz
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=20kHz
THD+N (%)
THD+N (%)
f=20Hz
f=20Hz
THD+N (%)
f=1kHz
f=1kHz
f=1kHz
f=20Hz
VDD=5V BTL mode RL=8
VDD=3.3V BTL mode RL=8
VDD=2.7V BTL mode RL=8
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=20kHz
THD+N (%)
THD+N (%)
f=1kHz
f=1kHz
f=20Hz f=20Hz VDD=5V SE mode RL=32 VDD=3.3V SE mode RL=32 VDD=2.7V SE mode RL=32
THD+N (%)
f=1kHz
f=20Hz
OUTPUT POWER (W)
OUTPUT POWER (W)
OUTPUT POWER (W)
THD+N vs. output power
THD+N vs. output power
THD+N vs. output power
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MOSA
CBP=10uF CBP=10uF
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
CBP=10uF
PSRR (dB)
PSRR (dB)
PSRR (dB)
CBP=1uF
CBP=1uF
CBP=1uF
VDD=5V SE mode RL=32
VDD=5V SE mode RL=32
VDD=5V SE mode RL=32
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
PSRR vs. frequency
PSRR vs. frequency
PSRR vs. frequency
CBP=1uF
CBP=1uF
CBP=1uF
CBP=10uF
CBP=10uF
CBP=10uF
PSRR (dB)
PSRR (dB)
VDD=5V BTL mode RL=8
VDD=3.3V BTL mode RL=8
PSRR (dB)
VDD=2.7V BTL mode RL=8
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
PSRR vs. frequency
PSRR vs. frequency
PSRR vs. frequency
VIN=0V No load
CHANNEL SEPARATION (dB)
QUIESCENT CURRENT (mA)
BTL mode
VDD=5V Po=90mW
VDD=3.3V Po=40mW
VDD=2.7V Po=25mW
SE mode
SE mode RL=32
SUPPLY VOLTAGE (V)
FREQUENCY (Hz)
Quiescent current vs. supply voltage
Channel separation vs. frequency
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APPLICATION INFORMATION
Basic application example
20k RF MS6853 1uF 20k RIN VINL VDD 100k 1 2 3 4 1uF 20k RIN VINR 5 L-IN SHUTDOWN HP-IN GND R-IN L-OUT/BTL OUTVDD BTL OUT+ BYPASS 10 9 8 7 6 1uF
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
100uF
VDD 1uF
RL 8
1k
Headphone Jack
100uF
R-OUT
1k 20k RF VDD 100k
DC Gain = -RF / RIN = -1 Fig.1 A audio amplifier application circuit.
SE mode and BTL mode operation As shown in block diagram and Fig.1, in the SE mode, the MS6853 operates as a high current output dual op amp. Amplifier A1 and A3 are independent amplifiers with an externally configured gain of AV = - RF/RIN. Amplifier A2 is shut down to a high output impedance state. In BTL mode, A3 is shutdown to a high impedance state. The audio signal from the R-IN pin is directed to the inverting input of A1. As a result, the L-IN and R-IN audio signals, VINL and VINR, are summed together at the input of A1. A2 is then activated with a closed-loop gain of AV = -1 fixed by two internal resistors. The outputs of A1 and A2 are then used to drive the mono bridged-tied load.
HP-IN operation The ability of the MS6853 is easily switched between mono BTL and stereo SE modes. The mode is switched by headphone control pin, HP-IN. A logic-high activates the SE mode when a set of headphone plugged into the system, on the other hand, a logical-low to HP-IN activates the BTL mode when no headphones.
Thermal pad considerations The thermal pad must be connected to ground. The package with thermal pad of the MS6853 requires special attention on thermal design. The thermal pad on the bottom of the MS6853 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 1.1
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EXTERNAL DIMENSIONS
MSOP10 (Thermal Pad)
Thermal Pad
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
Symbol A A1 A2 b c D H E
Dimension in mm Min
0.81 0.05 0.76 0.15 0.13 2.90 4.70 2.90
Dimension in inches Min
0.032 0.002 0.030 0.006 0.005 0.114 0.185 0.114
Nom
Max
1.12 0.15 0.97 0.30 0.23 3.10 5.10 3.10 0.66 6o 1.52 1.27
Nom
Max
W1
H
E
W2
e
L W1 W2
D
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 -
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
A
A2 A1 e B L C
TSSOP14
D
Symbol A A1 A2 b C D E E1
Dimension in mm Min
0.05 0.80 0.19 0.09 4.90 4.3
Dimension in inches Min Nom Max
0.047 0.002 0.006 0.031 0.039 0.041 0.007 0.012 0.0035 0.008 0.193 0.197 0.201 0.026 0.170 0.173 0.177 0.026 BASIC 0.0177 0.024 0.0295 0o 8o
Nom
Max
E1 E
e
L
1.20 0.15 1.00 1.05 0.30 0.20 5.00 5.10 6.40 4.4 4.5 0.650 BASIC 0.45 0.60 0.75 0o 8o
A2 A
e b A1 L C
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MOSA
TAPE AND REEL (Unit : mm)
MSOP10
2.0 0.30 0.05 4.0 0.05
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
1.5+0.1/-0.0 DIA
1.75 0.3R MAX 5.5 0.05 12.0 0.3
5.4
3.0 3.6 6.9
8.0 1.5 MIN 0.5 Radius Typical
2.0 1.7
REV 1.1
10
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MOSA
DEMO BOARD
MSOP10 (Thermal Pad)
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
1 3
2 4
5
TSSOP14
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Function description
MS6853
Mono 1.9W / Stereo 300mW Power Amplifier
Label 1: Supply Input Supply voltage range is 2.7V to 5.5V, the right of jump is positive, the left 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: Headphone Jack Used 3.5mm diameter of headphone with 32ohm Label 5: Shutdown Control System is active mode when jump is close, system enters shutdown mode when jump is open.
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.
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