MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control Dual 2W Power Amplifier 3 Stereo Inputs with Volume Control FEATURES •Control interface : I2C •Excellent Power Supply Rejection Ratio(PSRR) •Flexibility power management •Component less •Reduce pop noise circuit •Housed in TSSOP20 package, enhanced thermal PAD •Operation range: 2.4V~5.5V •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=4Ω, 2W at 5V, 0.8W at 3.3V, 360mW at 2.4V RL=8Ω, 1.3W at 5V, 0.53W at 3.3V, 250mW at 2.4V •SE Output power RL=32Ω, 93mW at 5V, 35mW at 3.3V, 15mW at 2.4V 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 4Ω bridged-tied (BTL) speaker or 2 * 90mW into stereo 32Ω 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~5.5V, low power consumption, power management, component less and small package TSSOP20, make the MS6865 ideally suitable for use in the portable digital audio equipments. BLOCK DIAGRAM LIN1 LIN2 LIN3 L-ch selector & Gain Attenuation & Mute -1 OUTR- -1 RIN3 RIN2 RIN1 R-ch selector & Gain Attenuation & Mute -1 OUTL- -1 I2C Interface Supply AVDD REV 1.0 AVSS CAP SCL SDA VSS 1 OUTR+ OUTL+ Power Amplifier Supply PVDDL PVSSL PVDDR PVSSR www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control PIN CONFIGURATION Symbol Pin Description VSS 1 Connected to ground CAP 2 Capacitor connected RIN1 3 Right channel input 1 RIN2 4 Right channel input 2 RIN3 5 Right channel input 3 AVSS 6 PVDDR 7 OUTR- 8 OUTR+ 9 PVSSR 10 PVSSL 11 OUTL+ 12 OUTL- 13 PVDDL 14 AVDD 15 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 LIN3 16 Left channel input 3 LIN2 17 Left channel input 2 LIN1 18 Left channel input 1 SDA 19 I2C data input VSS 1 20 SCL CAP 2 19 SDA RIN1 3 18 LIN1 RIN2 4 17 LIN2 RIN3 5 AVSS 6 16 LIN3 Thermal Pad 15 AVDD PVDDR 7 14 PVDDL OUTR- 8 13 OUTL- OUTR+ 9 12 OUTL+ PVSSR 10 11 PVSSL MS6865, TSSOP20 SCL 20 I2C clock input Note: 1. SE: Single Ended. BTL: Bridged-Tied Load ORDERING INFORMATION Package Part number Packaging Marking Transport Media 20Pin TSSOP (lead free) MS6865TGTR MS6865G 2.5k Units Tape and Reel 20Pin TSSOP (lead free) RoHS Compliance MS6865TGU MS6865G 75 Units Tube ABSOLUTE MAXIMUM RATINGS Symbol Parameter Rating Unit 6 V 2000 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 TSSOP20 (enhanced thermal pad) 51 VDD Supply voltage VESD Electrostatic handling TSTG REV 1.0 2 ℃/W www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control OPERATING RATINGS Symbol VDD Min Typ Max Unit 2.4 5 5.5 V Conditions Min Typ Max Unit All devices are active, BTL 0.5VDD -0.05 0.5VDD -0.05 - Parameter Supply voltage 5V ELECTRICAL CHARACTERISTICS (Ta=25℃, VDD=5V, VSS=0V, f=1kHz; unless otherwise specified) Parameter Symbol DC Characteristics VCAP Voltage at CAP VDC Output DC level IQ Quiescent current 0.5VDD 0.5VDD 10 All devices are active, SE 6.7 L-ch (R-ch) PD, BTL 5.2 L-ch (R-ch) PD, SE 3.4 All devices power down All devices power down, except CAP=1/2 VDD - - 0.5VDD +0.05 0.5VDD +0.05 - V V mA 0.3 IPD Power down current ATT Mute attenuation GARAN Gain/Attenuation range 0 dB GSTEP Gain step - 3 - dB ASTEP Attenuation step - 1.25 - dB EGA Gain/Attenuation step error - 0.3 - dB VI2CH Serial interface high input level 2 VI2CL Serial interface low input level Gain 0 Attenuation uA 12 - -77.5 -90 dB 21 dB V 0.8 V AC Characteristics PSRR CS Power supply rejection ratio Channel separation THD+N Total harmonic distortion plus Noise S/N Signal-to-noise ratio Po Maximum output power 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% - 61 - dB - 65 - dB - 78 - dB - 81 - dB - -65 - dB - 0.0562 - % - 93 - dB - 2 - W - 1.3 - W - 93m - W PD: Power Down REV 1.0 3 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control 3.3V ELECTRICAL CHARACTERISTICS (Ta=25℃, VDD=3.3V, VSS=0V, f=1kHz; unless otherwise specified) Parameter Symbol Conditions Min Typ Max All devices are active, BTL - 9 - All devices are active, SE - 6 - L-ch (R-ch) PD, BTL - 4.6 - L-ch (R-ch) PD, SE - 3.0 - Unit DC Characteristics IQ Quiescent current mA AC Characteristics THD+N Po - -65 60 dB - 0.0562 0.1 % - 0.8 - W - 0.53 - W - 35m - W Conditions Min Typ Max Unit All devices are active, BTL - 7.6 - All devices are active, SE - 5.1 - L-ch (R-ch) PD, BTL - 4 - L-ch (R-ch) PD, SE - 2.6 - - -65 -60 dB - 0.0562 0.1 % - 0.36 - W - 0.25 - W - 15m - W Total harmonic distortion plus Noise SE mode, RL=32Ω, 35mW Maximum output power BTL Mode, RL = 4Ω THD+N = 1% BTL Mode, RL = 8Ω THD+N = 1% SE Mode, RL = 32Ω THD+N = 0.1% 2.4V ELECTRICAL CHARACTERISTICS (Ta=25℃, VDD=2.4V, VSS=0V, f=1kHz; unless otherwise specified) Parameter Symbol DC Characteristics IQ Quiescent current mA AC Characteristics THD+N Po REV 1.0 Total harmonic distortion plus Noise SE mode, RL=32Ω, 15mW Maximum output power BTL Mode, RL = 4Ω THD+N = 1% BTL Mode, RL = 8Ω THD+N = 1% SE Mode, RL = 32Ω THD+N = 0.1% 4 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control TYPICAL PERFORMANCE CHARACTERISTICS VDD=5V, Po=2W BTL mode, RL=4Ω VDD=3.3V, Po=0.8W BTL mode, RL=4Ω VDD=2.4V, Po=330mW BTL mode, RL=4Ω THD+N (%) FREQUENCY (Hz) THD+N vs. frequency THD+N (%) FREQUENCY (Hz) THD+N vs. frequency THD+N (%) FREQUENCY (Hz) THD+N vs. frequency VDD=5V, Po=1.2W BTL mode, RL=8Ω VDD=3.3V, Po=0.53W BTL mode, RL=8Ω VDD=2.4V, Po=250mW BTL mode, RL=8Ω FREQUENCY (Hz) THD+N vs. frequency THD+N (%) Po=25mW VDD=3.3V, Po=35mW SE mode, RL=32Ω THD+N (%) FREQUENCY (Hz) THD+N vs. frequency THD+N (%) FREQUENCY (Hz) THD+N vs. frequency VDD=5V, Po=90mW SE mode, RL=32Ω REV 1.0 THD+N (%) THD+N (%) THD+N (%) (Ta=25℃; unless otherwise specified) VDD=2.4, Po=15mW SE mode, RL=32Ω FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) THD+N vs. frequency THD+N vs. frequency THD+N vs. frequency 5 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control f=20kHz f=20kHz f=1kHz f=1kHz THD+N (%) THD+N (%) THD+N (%) f=20kHz f=1kHz f=20Hz f=20Hz f=20Hz VDD=3.3V BTL mode RL=4Ω VDD=5V BTL mode RL=4Ω VDD=2.4V BTL mode RL=4Ω 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=1kHz f=1kHz f=1kHz THD+N (%) THD+N (%) THD+N (%) f=20kHz f=20Hz f=20Hz f=20Hz VDD=5V BTL mode RL=8Ω VDD=3.3V BTL mode RL=8Ω VDD=2.4V BTL mode 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 f=20kHz f=20kHz f=1kHz VDD=5V SE mode RL=32Ω REV 1.0 f=20Hz f=1kHz VDD=3.3V SE mode RL=32Ω THD+N (%) f=20Hz THD+N (%) THD+N (%) f=20kHz f=20Hz f=1kHz VDD=2.4V SE mode RL=32Ω OUTPUT POWER (W) OUTPUT POWER (W) OUTPUT POWER (W) THD+N vs. output power THD+N vs. output power THD+N vs. output power 6 www.mosanalog.com MS6865 3 Stereo inputs / 2W PA output with Volume Control CHANNEL SEPARATION (dB) CHANNEL SEPARATION (dB) MOSA VDD=5V, Po=1W BTL, RL=8Ω VDD=5V, Po=60mW SE, RL=32Ω FREQUENCY (Hz) FREQUENCY (Hz) Channel separation vs. frequency Channel separation vs. frequency CAP=10uF CAP=10uF CAP=1uF PSRR (dB) PSRR (dB) CAP=1uF VDD=5V, VRR=200mVrms, BTL RL=8Ω VDD=5V, VRR=200mVrms, SE RL=32Ω FREQUENCY (Hz) FREQUENCY (Hz) PSRR vs. frequency PSRR vs. frequency LPD or RPD BTL SE QUIESCENT CURRENT (mA) QUIESCENT CURRENT (mA) All Devices activate. BTL SE SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Quiescent current vs. supply voltage Quiescent current vs. supply voltage REV 1.0 7 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control I2C CONTROL INTERFACE 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 1-7 8 9 R/W ACK 1-7 8 9 1-7 8 9 S P ADDRESS START CONDITION DATA ACK DATA ACK STOP CONDITION I2C chip address 88H 1 0 0 0 1 7 bits address REV 1.0 0 0 0 W 8 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control I2C data bytes description MSB LSB Function 0 0 B2 B1 B0 A2 A1 A0 L-ch, Attenuation and Mute 0 1 B2 B1 B0 A2 A1 A0 R-ch, Attenuation and Mute 1 0 0 G2 G1 G0 S1 S0 L-ch, Input Gain and line Selection 1 0 1 G2 G1 G0 S1 R-ch, Input Gain and line Selection 1 1 0 1 RPD LPD PDPR S0 CAP PD 0 Output mode (SE/BTL) S/B 0 0 1 1 1 Where Ax = 1.25dB/step; Bx = 10dB/step; Gx = 3dB/step 0 Power Down Mode Attenuation and Mute MSB LSB 0 0 0 1 B2 B1 B0 L-ch, Attenuation and Mute A2 A1 A0 0 0 0 0 dB 0 0 1 -1.25 dB 0 1 0 -2.5 dB 0 1 1 -3.75 dB 1 0 0 -5 dB 1 0 1 -6.25 dB 1 1 0 -7.5 dB 1 1 1 -8.75 dB R-ch, Attenuation and Mute 0 0 0 0 dB 0 0 1 -10 dB 0 1 0 -20 dB 0 1 1 -30 dB 1 0 0 -40 dB 1 0 1 -50 dB 1 1 0 -60 dB 1 1 1 -70 dB 1 1 1 1 Initial state: Both L-ch and R-ch are mute-on. REV 1.0 Function 1 1 Mute 9 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control Input Selector and Input Gain LSB MSB 1 0 0 1 0 1 G2 G1 G0 Function L-ch, Input Gain and line Selection S1 S0 0 0 Line 1 (L-ch or R-ch) 0 1 Line 2 (L-ch or R-ch) 1 0 Line 3 (L-ch or R-ch) R-ch, Input Gain and line Selection 0 0 0 0 dB 0 0 1 3 dB 0 1 0 6 dB 0 1 1 9 dB 1 0 0 12 dB 1 0 1 15 dB 1 1 0 18 dB 1 1 1 Initial state: L-ch1, R-ch1, Input gain is 0dB. 21 dB Power Down Mode MSB 1 1 0 1 RPD LSB CAP LPD PDPR PD Function Power mode selection and power management 0 R-ch PA output is active mode 1 R-ch PA output is power down mode 0 L-ch PA output is active mode 1 L-ch PA output is power down mode 0 Disable preparation for power off 1 Enable preparation for power off 0 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. LPD -1 -1 RPD -1 -1 REV 1.0 10 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control Output mode (SE/BTL) LSB MSB 1 1 1 0 S/B 0 0 Function Output mode, mixer control and audio format 0 0 Output mode is BTL 1 Initial state: Output mode is BTL mode. Output mode is SE I2C Initial code and status MSB LSB Function Initial status 1 L-ch, Attenuation and Mute Mute On R-ch, Attenuation and Mute Mute On 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 L-ch, Input Gain and line Selection Line1, 0dB 1 0 1 0 0 0 0 0 R-ch, Input Gain and line Selection 1 1 0 1 1 1 1 1 Power Down Mode 1 1 1 0 0 0 0 0 Output mode (SE/BTL) Line1, 0dB All devices are power down BTL REV 1.0 1 1 1 1 1 11 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control I2C CODE EXAMPLE Input gain Set the left channel gain to be 3dB and the right channel gain to be 3dB Gain Start MS6865 Address ACK 1 0 0 0 0 Gain 1 0 0 ACK 1 0 L-ch1, G = 3dB 1 0 0 1 0 0 ACK Stop 0 ACK Stop ACK Stop 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 -5dB 1 1 0 -30dB 0 ACK 0 1 L-ch, Att = -15dB 0 1 0dB 1 0 0 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 0 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 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 CH 0 0 0 1 1 R-ch 0 L-ch3, G = 3dB REV 1.0 ACK 1 0 CH 1 0 0 1 0 0 R-ch1, G = 3dB 12 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control OPERATION PROCEDURE 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 Setting Input Gain IsFixed Volume Down To Mute Input Channels Mute On Volume Down To Mute Input Channels Mute On I2C pull low V DD = GND Power On [ Enable Input & Input Gain ] Code: Lch 100xxx00 Rch 101xxx00 [ Attenuation and Mute ] Code: Lch 00111111 (3Fh) Rch 01111111 (7Fh) Disable Power Down Power Down Preparation V DD = Supply voltage [ 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 Default Status [Attenuation & Mute] Mute on (max attenuation) [ Input Selector & Input Gain ] L-ch1, R-ch1 0dB Power Down Preparation [ Power Down Mode ] Code: 11010010 (D2h) [ Disable Input & Gain = 0dB] Code: Lch 10000011 (83h) Rch 10100011 (a3h) wait 7 sec PDPR = 0 [ Power Down Mode ] Code: 11010000 (D0h) Wait 0.5 sec Power Down All The Devices Only CAPPD Keep Activating [ Power Down Mode ] All power down status [ Output Mode & Mixer & Format ] BTL mode [ Attenuation and Mute ] Code: Lch 00111111 (3Fh) Rch 01111111 (7Fh) [ Power Down Mode ] Code: 11011110 (DEh) Power Down All The Devices Pull Down CAP Pin To Ground [ Power Down Mode ] Code: 11011111 (DFh) Mute Off And Volume Up/Down Step By Step [ Attenuation and Mute ] Code: Lch 00xxxxxx Rch 01xxxxxx Keep All The Digital Interface Signals Unchanged All The Digital Interface Signals Pull Low I2C pull low Power Off Disconnect V DD VDD will be fell down to 0V REV 1.0 13 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control For BTL mode only Power On Activating Power Down (Shut Down) Power Off All the Digital Interface Signals Pull Low Setting Input Gain IsFixed Volume Down To Mute Input Channels Mute On Volume Down To Mute Input Channels Mute On I2C pull low V DD = GND Power On [ Input Gain ] Code: Lch 100xxx00 Rch 101xxx00 [ Attenuation and Mute ] Code: Lch 00111111 (3Fh) Rch 01111111 (7Fh) Disable Power Down Pull Down CAP Pin To Ground V DD = Supply voltage [ Power Down Mode ] Code: 11010000 (D0h) Wait 0.5 sec [ Power Down Mode ] Code: 11010001 (D1h) Wait 0.1 sec [ Attenuation and Mute ] Code: Lch 00111111 (3Fh) Rch 01111111 (7Fh) Pull Down CAP Pin To Ground [ Power Down Mode ] Code: 11010001 (D1h) Wait 0.1 sec Default Status [Attenuation & Mute] Mute on (max attenuation) Mute Off And Volume Up/Down Step By Step [ Input Selector & Input Gain ] L-ch1, R-ch1 0dB [ Attenuation and Mute ] Code: Lch 00xxxxxx Rch 01xxxxxx Power Down All The Devices [ Power Down Mode ] Code: 11011111 (DFh) Power Down All The Devices [ Power Down Mode ] Code: 11011111 (DFh) [ Power Down Mode ] All power down status [ Output Mode & Mixer & Format ] BTL mode Keep All The Digital Interface Signals Unchanged All The Digital Interface Signals Pull Low I2C pull low Power Off Disconnect V DD VDD will be fell down to 0V REV 1.0 14 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control APPLICATION INFORMATION A base application circuit MS6865 2.4~5.5V Supply 15 1uF 0.1uF 4.7uF MCU 6 2 AVDD AVSS CAP 20 SCL 19 SDA 1 VSS PVDDL PVSSL 14 11 PVSSR 10 PVDDR 7 2.4~5.5V Power Amplifier Supply 1uF 1uF VDD 100k 100k MCU HP_sense 1uF 10uF L channel 100uF 18 LIN1 17 LIN2 16 LIN3 3 RIN1 4 RIN2 5 RIN3 OUTL- 13 OUTL+ 12 OUTR- 8 OUTR+ 9 RL 8Ω 10uF R channel 1k Headphone Jack 100uF RL 8Ω 1k 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 OUTR- -1 RL 4Ω / 8Ω A2 OUTR+ -1 B1 OUTL- -1 RL 4Ω / 8Ω B2 OUTL+ -1 I2C Interface SCL SDA REV 1.0 15 www.mosanalog.com MS6865 MOSA 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 A1 OUTR- -1 100uF RL 16Ω / 32Ω 1k A2 Shutdown -1 B1 100uF OUTL- -1 1k B2 -1 Shutdown 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: VDD MS6865 100k SCL 100k MCU SDA 1uF HP_sense 100uF OUTLOUTL+ RL 8Ω 1k Headphone Jack 100uF OUTROUTR+ RL 8Ω 1k 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 1.0 16 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control EXTERNAL DIMENSIONS TSSOP20 (Thermal Pad) D D2 Detail A E2 E1 E C A2 A θ A1 B e L y Dimension in mm Dimension in inches Symbol Min Nom Max Min Nom Max A 0.80 - 1.15 0.031 - 0.045 A1 0.00 - 0.10 0.000 - 0.004 A2 0.80 1.00 1.05 0.031 0.039 0.041 0.012 b 0.19 - 0.30 0.007 - C 0.09 - 0.20 0.004 - 0.008 D 6.40 6.50 6.60 0.252 0.256 0.260 D2 3.70 3.80 3.90 0.146 0.150 0.154 E 6.20 6.40 6.60 0.244 0.252 0.260 E1 4.30 4.40 4.50 0.169 0.173 0.177 E2 2.70 2.80 2.90 0.106 0.110 0.114 e REV 1.0 0.650 BASIC 0.026 BASIC L 0.45 0.60 0.75 θ 0 - 8 0 - 8 y - - 0.10 - - 0.004 o 0.018 o o 17 0.024 0.030 o www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control DEMO BOARD 1 2 6 3 4 5 Function description Label 1: Supply Input Supply voltage range is 2.4V to 5.5V. 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 1.0 18 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control IR Controller 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 1.0 19 www.mosanalog.com MS6865 MOSA 3 Stereo inputs / 2W PA output with Volume Control Circuit J1 DVCC R1 1 2 + DVCC C3 0.1u + S1 + C2 10u C4 1u 10K 20P C7 20P 2 + C6 Y1 24M DGND Q2 J2 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 AT89C4051 1 47u 2 IR_IN 20 19 18 17 16 15 14 13 12 11 R7 1 C8 NMOS AVDD IN1 D1 IN2 D2 IN3 D3 3 VS GND IR IR + C5 470P DGND 100K + 2 1 2 U1 1 2 3 4 5 IR_IN 6 7 SCL SDA 8 HP_IN 9 10 Q1 C1 + 3 + 1 W1 JUMP R2 10K R4 R5 R3 1K 1K 1K RST R6 220 + AVDD C9 0.1u 1u + R8 C10 1u 100K U2 J3 + 1 2 3 C13 C14 10u 10u R11 R12 1K 1K C15 SP1 10u C16 SPK_R + 10u + R13 R14 1K 1K C20 10u Vss CAP INR1 INR2 INR3 AVss PVDDR OUTROUTR+ PVSSR MS6865 C19 100u SCL SDA INL1 INL2 INL3 AVDD PVDDL OUTLOUTL+ PVSSL 20 SCL 19 SDA 18 17 16 15 14 AVDD 13 12 11 + C17 1u SP2 SPK_L + C18 100u + IN3 R L G 1K 1K + J5 R9 R10 1 2 3 4 5 6 7 8 9 10 C12 1u + IN2 R L G 1 2 3 10u + J4 C11 + IN1 R L G 1 2 3 R15 1K R16 1K 1 2 3 4 5 6 HP-IN HP-R R HP-L L G HEADPHONE J7 1 2 3 OUT W2 Jumper AGND REV 1.0 AGND DGND 20 www.mosanalog.com