MOSA MS6891 Mono 1.1W Power Amplifier with Shutdown Mono 1.1W Power Amplifier with Shutdown, Low Voltage Operation FEATURES APPLICATIONS ‧Operation range: 2.5V ~ 6.5V ‧Shutdown Current 0.1uA at 6V ‧PSRR at 217Hz, 60dB at 5V ‧Output power, THD+N=1% RL=8Ω, 1.5W at 6V, 1.1W at 5V, 0.4W at 3.3V, 200mW at 2.5V ‧Unity-gain stable ‧Space-saving SOP8 , MSOP8 ‧Portable electronic devices ‧PDAs ‧Communication headsets Cross-reference LM4891 DESCRIPTION The MS6891 is a low distortion power amplifier that can drive 1.5W（6V） 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 MS6891 is unity-gain stable and can be configured by external gain-setting resistors. The MS6891 has good feature for portable equipment, these features include the low voltage operation, micropower consumption shutdown mode, small package SOP8, MSOP8, make the MS6891 ideally suited for use in portable electronic equipments. BLOCK DIAGRAM - IN 4 - 3 + + IN A1 BP 2 SHDN 1 REV 1 VDD 6 GND 7 + A2 - 5 Vo1 + 8 Vo2 Bias control 1/10 www.mosanalog.com MOSA MS6891 Mono 1.1W Power Amplifier with Shutdown PIN CONFIGURATION Symbol Pin Description SHDN 1 Shutdown places the entire device in shutdown mode when held High. 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 8 Vo2 BP 2 7 GND +IN 3 6 VDD -IN 4 5 Vo1 ORDERING INFORMATION Package 8-Pin SOP (lead free) Part number MS6891GTR Packaging Marking 6891G Transport Media 2.5k Units Tape and Reel 8-Pin SOP (lead free) MS6891GU 6891G 100 Units Tube 8-Pin MSOP (lead free) MS6891MGTR 6891G 3.5k Units Tape and Reel 8-Pin MSOP (lead free) MS6891MGU 6891G 80 Units Tube ABSOLUTE MAXIMUM RATINGS Symbol Parameter VDD Supply voltage VESD Electrostatic handling TSTG Rating Unit 6.5 V 3500 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 260 ℃ RTHJA Thermal resistance from junction to ambient in free air SOP8 MSOP8 210 50 ℃/W REV 1 2/10 www.mosanalog.com MOSA MS6891 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 6V ELECTRICAL CHARACTERISTICS Ta = 25°C, VDD=6V, f=1kHz, BW<30kHz, unless otherwise specified. Symbol Parameter Conditions IQ Quiescent current VIN=0V, IO=0A - 3 - mA ISHDN Shutdown current VSHDN = 6V - 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 - 55 - dB THD+N Total harmonic distortion plus noise RL=8Ω, 1.5W - -54 -50 dB - 0.2 0.316 % S/N Signal-to-noise ratio RL=8Ω, 1.5W 95 108 - dB Output power RL=8Ω, THD+N = 1% - 1.5 - W Min Typ Max Unit - mA Po 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 - 2.6 ISHDN Shutdown current 0.1 - uA Power supply rejection ratio VSHDN=5V RL=8Ω, CBP=1uF, f=217Hz - PSRR - 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 Po Output power RL=8Ω, THD+N = 1% - 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 - 2.3 - mA ISD Shutdown current - 0.1 - uA PSRR Power supply rejection ratio VSHDN=3.3V 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% REV 1 3/10 - 60 - dB - -55 -50 dB 0.17 0.316 % 90 100 - dB - 0.4 - W www.mosanalog.com MOSA MS6891 Mono 1.1W Power Amplifier with Shutdown 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=2.5V RL=8Ω, CBP =1uF, f=217Hz - 60 - dB THD+N Total harmonic distortion plus noise RL=8Ω, 0.2W - -55 -50 dB - 0.17 0.316 % S/N Signal-to-noise ratio RL=8Ω, 0.2W Po Output power RL=8Ω, THD+N = 1% 90 98 - dB - 0.2 - W TYPICAL PERFORMANCE CHARACTERISTICS VDD=6V RL=8Ω Po=1.1W THD+N (%) THD+N (%) Po=1.5W THD+N (%) Ta = 25°C, BW<30kHz, unless otherwise specified. VDD=5V RL=8Ω Po=0.4W VDD=3.3V RL=8Ω FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) THD+N vs. frequency THD+N vs. frequency THD+N vs. frequency VDD=2.5V RL=8Ω REV 1 f=1kHz f=20Hz VDD=6V RL=8Ω f=20kHz THD+N (%) Po=0.2W THD+N (%) THD+N (%) f=20kHz f=1kHz f=20Hz VDD=5V RL=8Ω FREQUENCY (Hz) OUTPUT POWER (W) OUTPUT POWER (W) THD+N vs. frequency THD+N vs. output power THD+N vs. output power 4/10 www.mosanalog.com MOSA MS6891 Mono 1.1W Power Amplifier with Shutdown f=20kHz f=20kHz f=20Hz f=1kHz THD+N (%) THD+N (%) f=1kHz VDD=3.3V RL=8Ω PSRR (dB) CBP=10uF CBP=1uF f=20Hz VDD=2.5V RL=8Ω VDD=6V RL=8Ω OUTPUT POWER (W) OUTPUT POWER (W) FREQUENCY (Hz) THD+N vs. output power THD+N vs. output power PSRR vs. frequency CBP=10uF VDD=5V RL=8Ω CBP=1uF VDD=3.3V RL=8Ω PSRR (dB) CBP=1uF CBP=10uF PSRR (dB) PSRR (dB) CBP=10uF CBP=1uF VDD=2.5V RL=8Ω FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) PSRR vs. frequency PSRR vs. frequency PSRR vs. frequency QUIESCENT CURRENT (mA) VIN=0V No load SUPPLY VOLTAGE (V) Quiescent current vs. supply voltage REV 1 5/10 www.mosanalog.com MOSA MS6891 Mono 1.1W Power Amplifier with Shutdown APPLICATION INFORMATION Basic application example Fig.1 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) REV 1 6/10 www.mosanalog.com MOSA MS6891 Mono 1.1W Power Amplifier with Shutdown EXTERNAL DIMENSIONS SOP8 Symbol H A A1 B C D H E e L 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 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 D L A A1 e B C MSOP8 Symbol H A A1 A2 B C D H E e L E 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 D A A2 A1 REV 1 e B L 7/10 C www.mosanalog.com MOSA MS6891 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 1 8/10 www.mosanalog.com MOSA MS6891 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 MS6891 is connected to GND. The system enters shutdown mode when the jump is placed right, the shutdown pin of MS6891 is connected to VDD. REV 1 9/10 www.mosanalog.com MOSA MS6891 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 MS6891 R6 20K JP3 C7 1 2 0.39u + L2 +IN_J 20K 8 7 6 5 LS1 SPEAKER R5 + C4 1u -IN REV 1 10/10 www.mosanalog.com