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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com 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 9/10 www.mosanalog.com 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 www.mosanalog.com