MS6865SSGU

MOSA MS6865 3 Stereo inputs / 2W PA output with Volume Control Dual 2W Power Amplifier 3 Stereo Inputs with Volume Control FEATURES •Operation range: 2.4V ~ 6.5V •3 stereo inputs •Volume control range Gain: 0 to 21dB, 3dB/step Attenuation: 0 to -77.5dB, 1.25dB/step •Output mode : Speaker( BTL)/Headphone(SE) •BTL Output power RL=4 , 2W at 5V, 0.8W at 3.3V, 360mW at 2.4V RL=8 , 1.3W at 5V, 0.53W at 3.3V, 250mW at 2.4V •SE Output power RL=32 , 93mW at 5V, 35mW at 3.3V, 15mW at 2.4V •Control interface : I2C •Excellent Power Supply Rejection Ratio(PSRR) •Flexibility power management •Component less •Reduce pop noise circuit •Housed in TSSOP20(enhanced thermal PAD) , SSOP(209mil) package APPLICATIONS Multimedia system, Portable Digital Audio. DESCRIPTION The MS6865 is low distortion stereo power amplifier that has 3 stereo inputs with volume control. It can drive 2W of continuous average power into a dual 4 bridged-tied (BTL) speaker or 2 * 90mW into stereo 32 single ended (SE) headphone. The volume control offers wide range of gain and attenuation for stereo input. All of the functions are easy setting that can be set by I2C interface. The MS6865 has good features for portable equipment, including wide voltage operation 2.4V ~ 6.5V, low power consumption, power management, component less, make the MS6865 ideally suitable for use in the portable digital audio equipments. BLOCK DIAGRAM REV 2 1/22 www.mosanalog.com MOSA PIN CONFIGURATION Symbol VSS CAP RIN1 RIN2 RIN3 AVSS PVDDR OUTROUTR+ PVSSR PVSSL OUTL+ OUTLPVDDL AVDD LIN3 LIN2 LIN1 SDA Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Description Connected to ground Capacitor connected Right channel input 1 Right channel input 2 Right channel input 3 Negative supply voltage Positive supply voltage for right channel of power amplifier SE right channel output or negative output of BTL right channel Positive output of BTL right channel Negative supply voltage for right channel of power amplifier Negative supply voltage for left channel of power amplifier Positive output of BTL left channel SE left channel output or negative output of BTL left channel Positive supply voltage for left channel of power amplifier Positive supply voltage Left channel input 3 Left channel input 2 Left channel input 1 I2C data input MS6865 3 Stereo inputs / 2W PA output with Volume Control VSS 1 CAP 2 RIN1 3 RIN2 4 RIN3 5 AVSS 6 PVDDR 7 OUTR- 8 OUTR+ 9 PVSSR 10 20 SCL 19 SDA 18 LIN1 17 LIN2 16 LIN3 15 AVDD 14 PVDDL 13 OUTL12 OUTL+ 11 PVSSL MS6865, TSSOP20 SSOP20(209mil) SCL 20 I2C clock input Note: 1. SE: Single Ended. BTL: Bridged-Tied Load REV 2 2/22 www.mosanalog.com MOSA ORDERING INFORMATION Package 20Pin TSSOP (lead free) 20Pin TSSOP (lead free) 20Pin SSOP (lead free) 20Pin SSOP (lead free) RoHS Compliance Part number MS6865TGTR MS6865TGU MS6865SSGTR MS6865SSGU MS6865 3 Stereo inputs / 2W PA output with Volume Control Packaging Marking MS6865G MS6865G MS6865G MS6865G Transport Media 2.5k Units Tape and Reel 75 Units Tube 2k Units Tape and Reel 66 Units Tube 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 TSSOP20 (enhanced thermal pad) SSOP20 (209mil) Parameter Rating 6.5 2000 -65 to 150 -40 to 85 150 260 51 107 Unit V V ℃ ℃ ℃ ℃ ℃/W OPERATING RATINGS Symbol VDD Supply voltage Parameter Min 2.4 Typ 5 Max 6.5 Unit V REV 2 3/22 www.mosanalog.com MOSA 5V ELECTRICAL CHARACTERISTICS (Ta=25℃, VDD=5V, VSS=0V, f=1kHz; unless otherwise specified) Symbol DC Characteristics VCAP VDC Voltage at CAP Output DC level Parameter MS6865 3 Stereo inputs / 2W PA output with Volume Control Conditions Min 0.5VDD -0.05 0.5VDD -0.05 - Typ Max 0.5VDD +0.05 0.5VDD +0.05 - Unit 0.5VDD 0.5VDD 10 6.7 5.2 3.4 V V All devices are active, BTL IQ Quiescent current All devices are active, SE L-ch (R-ch) PD, BTL L-ch (R-ch) PD, SE IPD ATT GARAN GSTEP ASTEP EGA VI2CH VI2CL Power down current Mute attenuation Gain/Attenuation range Gain step Attenuation step Gain/Attenuation step error Serial interface high input level Serial interface low input level BTL Mode , RL=8Ω CAP=1uF, f=200Hz SE Mode , RL=32Ω CAP=1uF, f=200Hz BTL Mode, RL=8Ω Po=1W SE Mode, RL=32Ω Po=60mW SE mode, RL=32Ω, 75mW SE mode, A-weighting, 75mW BTL Mode, RL = 4Ω THD+N = 1% BTL Mode, RL = 8Ω THD+N = 1% SE Mode, RL = 32Ω THD+N = 0.1% Gain Attenuation All devices power down All devices power down, except CAP=1/2 VDD mA - 12 0.3 uA -90 dB dB dB dB dB dB V 0.8 V 0 -77.5 2 3 1.25 0.3 21 0 - AC Characteristics 61 65 78 81 -65 0.0562 93 2 1.3 93m dB dB dB dB dB % dB W W W PSRR Power supply rejection ratio CS Channel separation THD+N S/N Total harmonic distortion plus Noise Signal-to-noise ratio Po Maximum output power PD: Power Down REV 2 4/22 www.mosanalog.com MOSA 3.3V ELECTRICAL CHARACTERISTICS Symbol DC Characteristics Parameter MS6865 3 Stereo inputs / 2W PA output with Volume Control (Ta=25℃, VDD=3.3V, VSS=0V, f=1kHz; unless otherwise specified) Conditions All devices are active, BTL IQ Quiescent current All devices are active, SE L-ch (R-ch) PD, BTL L-ch (R-ch) PD, SE AC Characteristics THD+N Total harmonic distortion plus Noise SE mode, RL=32Ω, 35mW BTL Mode, RL = 4Ω THD+N = 1% BTL Mode, RL = 8Ω THD+N = 1% SE Mode, RL = 32Ω THD+N = 0.1% -65 0.0562 0.8 0.53 35m 60 0.1 dB % W W W Min Typ 9 6 4.6 3.0 Max mA Unit Po Maximum output power 2.4V ELECTRICAL CHARACTERISTICS (Ta=25℃, VDD=2.4V, VSS=0V, f=1kHz; unless otherwise specified) Symbol DC Characteristics All devices are active, BTL IQ Quiescent current All devices are active, SE L-ch (R-ch) PD, BTL L-ch (R-ch) PD, SE AC Characteristics THD+N Total harmonic distortion plus Noise SE mode, RL=32Ω, 15mW BTL Mode, RL = 4Ω THD+N = 1% BTL Mode, RL = 8Ω THD+N = 1% SE Mode, RL = 32Ω THD+N = 1% -65 0.0562 0.36 0.25 15m -60 0.1 dB % W W W 7.6 5.1 4 2.6 mA Parameter Conditions Min Typ Max Unit Po Maximum output power REV 2 5/22 www.mosanalog.com MOSA (Ta=25℃; unless otherwise specified) MS6865 3 Stereo inputs / 2W PA output with Volume Control TYPICAL PERFORMANCE CHARACTERISTICS THD+N (%) THD+N (%) VDD=5V, Po=2W BTL mode, RL=4 VDD=3.3V, Po=0.8W BTL mode, RL=4 THD+N (%) VDD=2.4V, Po=330mW BTL mode, RL=4 FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) THD+N vs. frequency THD+N vs. frequency THD+N vs. frequency THD+N (%) THD+N (%) VDD=5V, Po=1.2W BTL mode, RL=8 VDD=3.3V, Po=0.53W BTL mode, RL=8 THD+N (%) VDD=2.4V, Po=250mW BTL mode, RL=8 FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) THD+N vs. frequency THD+N vs. frequency THD+N vs. frequency THD+N (%) THD+N (%) VDD=5V, Po=90mW SE mode, RL=32 VDD=3.3V, Po=35mW SE mode, RL=32 THD+N (%) Po=25mW VDD=2.4, Po=15mW SE mode, RL=32 FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) THD+N vs. frequency THD+N vs. frequency THD+N vs. frequency REV 2 6/22 www.mosanalog.com MOSA f=20kHz f=20kHz MS6865 3 Stereo inputs / 2W PA output with Volume Control f=20kHz THD+N (%) THD+N (%) f=1kHz f=1kHz THD+N (%) f=1kHz f=20Hz f=20Hz VDD=5V BTL mode RL=4 VDD=3.3V BTL mode RL=4 f=20Hz VDD=2.4V BTL mode RL=4 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=20Hz THD+N (%) f=1kHz f=1kHz f=20Hz f=20Hz VDD=5V BTL mode RL=8 VDD=3.3V BTL mode RL=8 VDD=2.4V 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=20Hz f=20Hz f=1kHz THD+N (%) f=20Hz f=1kHz f=1kHz VDD=5V SE mode RL=32 VDD=3.3V SE mode RL=32 VDD=2.4V SE mode RL=32 OUTPUT POWER (W) OUTPUT POWER (W) OUTPUT POWER (W) THD+N vs. output power THD+N vs. output power THD+N vs. output power REV 2 7/22 www.mosanalog.com MOSA MS6865 3 Stereo inputs / 2W PA output with Volume Control VDD=5V, Po=1W BTL, RL=8 CHANNEL SEPARATION (dB) CHANNEL SEPARATION (dB) VDD=5V, Po=60mW SE, RL=32 FREQUENCY (Hz) FREQUENCY (Hz) Channel separation vs. frequency Channel separation vs. frequency CAP=10uF CAP=10uF CAP=1uF CAP=1uF PSRR (dB) VDD=5V, VRR=200mVrms, BTL RL=8 PSRR (dB) VDD=5V, VRR=200mVrms, SE RL=32 FREQUENCY (Hz) FREQUENCY (Hz) PSRR vs. frequency PSRR vs. frequency All Devices activate. LPD or RPD QUIESCENT CURRENT (mA) BTL SE QUIESCENT CURRENT (mA) BTL SE SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Quiescent current vs. supply voltage Quiescent current vs. supply voltage REV 2 8/22 www.mosanalog.com MOSA I2C CONTROL INTERFACE MS6865 3 Stereo inputs / 2W PA output with Volume Control Data are transmitted to and from the MCU and MS6865 via the SDA and SCL. The SDA and SCL make up the BUS interface. It should be noted that pull-up resistors must be connected to the positive supply voltage. VDD Rp Rp Pull up resistors SDA (Serial Data Line) SCL (Serial Clock Line) MCU MS6865 I2C interface protocol The format consists of the following: •A START condition •A chip address byte including the chip address. (7bits) •The 8th bit of the byte must be “0”.(write=0, read=1) •The chip must always acknowledge the end of each transmitted byte. •A data sequence (N-bytes + Acknowledge) •A STOP condition SDA SCL S START CONDITION 1-7 8 9 1-7 8 9 1-7 8 9 P ADDRESS R/W ACK DATA ACK DATA ACK STOP CONDITION I2C chip address 88H 1 0 0 0 1 0 0 0 W 7 bits address REV 2 9/22 www.mosanalog.com MOSA I2C data bytes description MSB 0 0 1 1 1 0 1 0 0 1 B2 B2 0 1 0 B1 B1 G2 G2 1 B0 B0 G1 G1 RPD A2 A2 G0 G0 LPD A1 A1 S1 S1 MS6865 3 Stereo inputs / 2W PA output with Volume Control LSB A0 A0 S0 S0 CAP PD 0 Function L-ch, Attenuation and Mute R-ch, Attenuation and Mute L-ch, Input Gain and line Selection R-ch, Input Gain and line Selection Power Down Mode Output mode (SE/BTL) PDPR 0 S/B 0 0 1 1 1 Where Ax = 1.25dB/step; Bx = 10dB/step; Gx = 3dB/step Attenuation and Mute MSB 0 0 0 1 B2 B1 B0 A2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 1 1 A1 0 0 1 1 0 0 1 1 LSB A0 0 1 0 1 0 1 0 1 Function L-ch, Attenuation and Mute R-ch, Attenuation and Mute 0 dB -1.25 dB -2.5 dB -3.75 dB -5 dB -6.25 dB -7.5 dB -8.75 dB 0 dB -10 dB -20 dB -30 dB -40 dB -50 dB -60 dB -70 dB Mute 1 1 1 1 Initial state: Both L-ch and R-ch are mute-on. REV 2 10/22 www.mosanalog.com MOSA Input Selector and Input Gain MSB 1 1 0 0 0 1 G2 G1 G0 S1 0 0 1 0 0 0 0 1 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 LSB S0 0 1 0 MS6865 3 Stereo inputs / 2W PA output with Volume Control Function L-ch, Input Gain and line Selection R-ch, Input Gain and line Selection Line 1 (L-ch or R-ch) Line 2 (L-ch or R-ch) Line 3 (L-ch or R-ch) 0 dB 3 dB 6 dB 9 dB 12 dB 15 dB 18 dB 21 dB 1 1 1 Initial state: L-ch1, R-ch1, Input gain is 0dB. Power Down Mode MSB 1 1 0 1 RPD 0 1 0 1 0 1 0 LSB CAP LPD PDPR PD Function Power mode selection and power management R-ch PA output is active mode R-ch PA output is power down mode L-ch PA output is active mode L-ch PA output is power down mode Disable preparation for power off Enable preparation for power off Set the voltage of CAP to middle of supply voltage 1 Pull down CAP pin to ground Initial state: All are the power down modes. Enable the power down preparation before the chip will be shut down. REV 2 11/22 www.mosanalog.com MOSA Output mode (SE/BTL) MSB 1 1 1 S/B 0 0 0 MS6865 3 Stereo inputs / 2W PA output with Volume Control LSB 0 Function Output mode, mixer control and audio format Output mode is BTL Output mode is SE 0 1 Initial state: Output mode is BTL mode. I2C Initial code and status MSB 0 0 1 1 1 1 0 1 0 0 1 1 1 1 0 1 0 1 1 1 0 0 1 0 LSB 1 1 0 0 1 0 Function L-ch, Attenuation and Mute R-ch, Attenuation and Mute L-ch, Input Gain and line Selection R-ch, Input Gain and line Selection Power Down Mode Output mode (SE/BTL) Initial status Mute On Mute On Line1, 0dB Line1, 0dB All devices are power down BTL 1 1 0 0 1 0 1 1 0 0 1 0 1 1 0 0 1 0 REV 2 12/22 www.mosanalog.com MOSA I2C CODE EXAMPLE Gain Start MS6865 Address ACK 1 0 0 0 0 1 0 0 MS6865 3 Stereo inputs / 2W PA output with Volume Control Input gain Set the left channel gain to be 3dB and the right channel gain to be 3dB Gain ACK 1 0 1 0 0 1 0 0 ACK Stop L-ch1, G = 3dB R-ch1, G = 3dB The left and right input channels are independent. Input Attenuation Set the left channel to be -15dB and the right channel to be -30dB -10dB Start MS6865 Address ACK 0 0 0 0 1 1 -5dB 0 0 ACK 0 1 0 -30dB 1 1 0 0dB 0 0 ACK Stop L-ch, Att = -15dB R-ch, Att = -30dB Power down mode Set the L-ch PA output to be active mode. L-ch Start MS6865 Address ACK 1 1 0 1 1 0 1 1 ACK Stop Left PA is active mode Output mode Set the output mode to be BTL mode Output mode Start MS6865 Address ACK 1 1 1 0 0 0 0 0 ACK Stop BTL mode Input Selector Set the left input channel to be LIN3 and the right input channel to be RIN1 L-ch Start MS6865 Address ACK 1 0 0 0 0 1 CH 1 0 ACK 1 R-ch 0 1 0 0 1 CH 0 0 ACK Stop L-ch3, G = 3dB R-ch1, G = 3dB REV 2 13/22 www.mosanalog.com MOSA OPERATION PROCEDURE MS6865 3 Stereo inputs / 2W PA output with Volume Control The sequence of operation: power on→ active → power down → active → power off. The basic flowcharts are as follows: For HP mode and HP/BTL mode Power On Activating Power Down (Shut Down) Power Off All the Digital Interface Signals Pull Low I2C pull low VDD = GND Setting Input Gain Is Fixed [ Enable Input & Input Gain ] Code: Lch 100xxx00 Rch 101xxx00 Volume Down To Mute Input Channels Mute On [ Attenuation and Mute ] Code: Lch 00111111 (3Fh) Rch 01111111 (7Fh) Volume Down To Mute Input Channels Mute On [ Attenuation and Mute ] Code: Lch 00111111 (3Fh) Rch 01111111 (7Fh) Power On VDD = Supply voltage Disable Power Down Power Down Preparation [ Power Down Mode ] Code: 11010011 (D2h) Wait 0.5 sec [ Power Down Mode ] Code: 11010010 (D2h) [ Disable Input & Gain = 0dB] Code: Lch 10000011 (83h) Rch 10100011 (a3h) wait 7 sec Power Down Preparation [ Power Down Mode ] Code: 11010010 (D2h) [ Disable Input & Gain = 0dB] Code: Lch 10000011 (83h) Rch 10100011 (a3h) wait 7 sec Default Status [Attenuation & Mute] Mute on (max attenuation) [ Input Selector & Input Gain ] L-ch1, R-ch1 0dB [ Power Down Mode ] All power down status [ Output Mode & Mixer & Format ] BTL mode Mute Off And Volume Up/Down Step By Step [ Attenuation and Mute ] Code: Lch 00xxxxxx Rch 01xxxxxx PDPR = 0 [ Power Down Mode ] Code: 11010000 (D0h) Wait 0.5 sec Power Down All The Devices Only CAPPD Keep Activating [ Power Down Mode ] Code: 11011110 (DEh) Power Down All The Devices Pull Down CAP Pin To Ground [ Power Down Mode ] Code: 11011111 (DFh) Keep All The Digital Interface Signals Unchanged All The Digital Interface Signals Pull Low I2C pull low Power Off Disconnect VDD VDD will be fell down to 0V REV 2 14/22 www.mosanalog.com MOSA For BTL mode only MS6865 3 Stereo inputs / 2W PA output with Volume Control REV 2 15/22 www.mosanalog.com MOSA APPLICATION INFORMATION A base application circuit MS6865 3 Stereo inputs / 2W PA output with Volume Control Output mode operation -- SE mode and BTL mode The output has two modes, SE mode and BTL mode. The mode is selected by I2C code via MCU. In BTL mode, the outputs of A1(B1) and A2(B2) are then used to drive the speakers(4Ω/8Ω). A1 -1 A2 -1 B1 -1 B2 -1 OUTL+ OUTLRL 4Ω / 8Ω OUTR+ OUTRRL 4Ω / 8Ω I2C Interface SCL SDA REV 2 16/22 www.mosanalog.com MOSA A1 -1 A2 Shutdown -1 B1 -1 OUTLOUTR- MS6865 3 Stereo inputs / 2W PA output with Volume Control In the SE mode, the amplifiers A2 and B2 are shutdown, and become the high output impedance states. Headphone Jack RL 16Ω / 32Ω 100uF 1k 100uF 1k B2 Shutdown -1 I2C Interface SCL SDA Headphone sense The output mode is SE or BTL that is decided by a headphone. It has to be set SE mode when a headphone is plug-in status. The output mode is selected by I2C command code by MCU. Please note that the MS6865 don’t detect a headphone automatically. Thus a detect function is executed via MCU. An operation diagram is shown as follows: The HP_sense pin is high when a headphone is plug-in. The HP_sense pin is low when a headphone is not plug-in. Thermal pad considerations The thermal pad must be connected to ground. The package with thermal pad of the MS6865 requires the special attention on thermal design. The thermal pad on the bottom of the MS6865 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 2 17/22 www.mosanalog.com MOSA EXTERNAL DIMENSIONS TSSOP20 (Thermal Pad) MS6865 3 Stereo inputs / 2W PA output with Volume Control D D2 Detail A E2 E1 E C A2 A θ A1 B L e y Dimension in mm Symbol Dimension in inches Min 0.031 0.000 0.031 0.007 0.004 0.252 0.146 0.244 0.169 0.106 0.018 0o - Min A A1 A2 b C D D2 E E1 E2 0.80 0.00 0.80 0.19 0.09 6.40 3.70 6.20 4.30 2.70 0.45 0o - Nom 1.00 6.50 3.80 6.40 4.40 2.80 0.650 BASIC 0.60 - Max 1.15 0.10 1.05 0.30 0.20 6.60 3.90 6.60 4.50 2.90 0.75 8o 0.10 Nom 0.039 0.256 0.150 0.252 0.173 0.110 0.026 BASIC 0.024 - Max 0.045 0.004 0.041 0.012 0.008 0.260 0.154 0.260 0.177 0.114 0.030 8o 0.004 e L θ y REV 2 18/22 www.mosanalog.com MOSA SSOP20 (209mil) MS6865 3 Stereo inputs / 2W PA output with Volume Control Dimension in mm Symbol Dimension in inches Min 0.002 0.065 0.009 0.004 0.272 0.291 0.197 0.022 0.004 0 Min A A1 A2 b C D E E1 0.05 1.65 0.22 0.09 6.9 7.4 5 0.55 0.09 0 Nom 1.75 0.3 0.15 7.2 7.8 5.3 0.650 BASIC 0.75 1.25 REF. 4 Max 2 1.85 0.33 0.21 7.5 8.2 5.6 0.95 8 Nom 0.069 0.012 0.006 0.283 0.307 0.209 0.026 BASIC 0.03 0.049 REF. 4 Max 0.079 0.073 0.013 0.008 0.295 0.323 0.220 0.038 8 E L L1 R1 θ REV 2 19/22 www.mosanalog.com MOSA DEMO BOARD MS6865 3 Stereo inputs / 2W PA output with Volume Control 1 2 6 3 4 5 Function description Label 1: Supply Input Supply voltage range is 2.4V to 6.5V. Label 2: Headphone Jack Used 3.5mm diameter of headphone with 32ohm Label 3: Speaker Output Connected to speaker with 8ohm or 4 ohm Label 4: Signal Input Connected to audio signals. Label 5: Reset All I/O pins are reset to default values. Label 6: LED Indicator The LEDs indicate the chip status and IR received status. Power ON status, it is red-dark blink twice and then keeps on a light state. Power OFF status, it is red-dark blink four times and then keeps on a dark state. It is red-dark blink once when the MCU has received the function code correctly. 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. REV 2 20/22 www.mosanalog.com MOSA IR Controller MS6865 3 Stereo inputs / 2W PA output with Volume Control Power ON/OFF : The power key. Press the key once to set power-on or power-off for MS6865. The default values are GAIN 0dB, ATTENUATION –20dB and MUTE-ON. VOL+, VOL- : The volume control keys. The volume control in 1.25dB/step as the switch is pressed once, the range is -78.75dB to 0dB. Gain+, Gain- : The gain control keys. The gain control in 3dB/step as the switch is pressed once, the range is 0dB to 21dB. PD/Active : The power down key. Press the key once to set power-down or activation for MS6865. Mute : The mute key Press the key once to set mute-on or mute-off. IN1~IN3 : Stereo input channel selection There are three sets, stereo 1 to 3. The default channel is stereo 1 on initial status. REV 2 21/22 www.mosanalog.com MOSA Circuit J1 1 2 DVCC + C3 0.1u DVCC + C4 1u R6 10K C6 20P 2 Y1 24M + RST 1 2 3 4 5 IR_IN 6 7 SCL SDA 8 HP_IN 9 10 3 Q2 NMOS 2 + C10 1u 1 C8 1u + S1 + C2 10u U1 RST P3.0 P3.1 XTAL2 XTAL1 P3.2 P3.3 P3.4 P3.5 GND Vcc P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 P3.7 20 19 18 17 16 15 14 13 12 11 R7 MS6865 3 Stereo inputs / 2W PA output with Volume Control R1 R2 10K 220 C1 + 47u Q1 1 2 3 VS GND IR IR + C5 470P R4 R5 R3 1K 1K 1K IN1 D1 IN2 D2 IN3 D3 IR_IN W1 JUMP DGND J2 1 2 AVDD AVDD + C9 0.1u C7 20P + 1 DGND 100K AT89C4051 R8 100K U2 J3 R L G R L G R L G 1 2 3 1 2 3 1 2 3 C11 R9 R10 1K 1K C13 C14 R11 R12 1K 1K C15 C16 R13 R14 1K 1K C20 10u + 10u + 10u + 10u SPK_R + + 10u + 10u + SP1 C12 1u + 1 2 3 4 5 6 7 8 9 10 Vss CAP INR1 INR2 INR3 AVss PVDDR OUTROUTR+ PVSSR SCL SDA INL1 INL2 INL3 AVDD PVDDL OUTLOUTL+ PVSSL 20 SCL 19 SDA 18 17 16 15 14 AVDD 13 12 11 + C17 1u IN1 J4 SP2 SPK_L + C18 100u 1 2 3 4 5 6 HP-IN HP-R R HP-L L G HEADPHONE J7 1 2 3 OUT IN2 J5 MS6865 C19 100u IN3 R15 1K R16 1K W2 Jumper AGND DGND AGND REV 2 22/22 www.mosanalog.com