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 www.mosanalog.com 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 www.mosanalog.com 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 VSD=0V@VSDM=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 VSD=0V@VSDM=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 VSD=0V@VSDM=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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com 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 www.mosanalog.com