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SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
The information in this document is subject to change without notice. c SAMHOP Microelectronics Corp. All Rights Reserved. 1007 7F,No.100,Min-Chyuan Road, Hsintien, Taipei Hsien, Taiwan, R.O.C. TEL: 886-2-2218-3978/2820 FAX: 886-2-2218-3320 Email : info@samhop.com.tw
SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
GENERAL DESCRIPTION
The SM7511 is a stereo audio power amplifier that drives 3 W/channel of continuous RMS power into a 3- load. Advanced dc volume control minimizes external components and allows BTL (speaker) volume control and SE (headphone) volume control. Notebook and pocket PCs benefit from the integrated feature set that minimizes external components without sacrificing functionality. To simplify design, the speaker volume level is adjusted by applying a dc voltage to the VOLUME terminal. Likewise, the delta between speaker volume and headphone volume can be adjusted by applying a dc voltage to the SEDIFF terminal. To avoid an unexpected high volume level through the headphones, a third terminal, SEMAX, limits the headphone volume level when a dc voltage is applied. Finally, to ensure a smooth transition between active and shutdown modes, a fade mode ramps the volume up and down.
FEATURES
* Advanced DC Volume Control With 2-dB Steps From -40 dB to 20 dB - Fade Mode - Maximum Volume Setting for SE Mode - Adjustable SE Volume control Referenced to BTL Volume Control * 3 W Into 3 - Speakers * Stereo Input MUX * Differential Inputs
APPLICATIONS
PIN ASSIGNMENTS (TOP VIEW)
* Notebook PC * LCD Monitors * Pocket PC * Portable DVD * Mini speaker
PGND ROUTPVDD RHPIN RLINEIN RIN VDD LIN LLINEIN LHPIN PVDD LOUT1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 ROUT+ SE/BTL HP/LINE VOLUME SEDIFF SEMAX AGND BYPASS FADE SHUTDOWN LOUT+ PGND
Thermal Pad
SM7511 24PIN
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V.1.3 Revised April 02,2007
SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
PIN DESCRIPTIONS
No. 1.13 2 3.11 4 5 6 7 8 9 10 12 14 15 16 17 18 19 20 21 22 23 24 Pin Name PGND ROUTPVDD RHPIN RLINEIN RIN VDD LIN LLINEIN LHPIN LOUTLOUT+ SHUTDOWN FADE BYPASS AGND SEMAX SEDIFF VOLUME HP/LINE SE/BTL ROUT+ I/O O I I I I I I O O I I I I I I I I O Power ground Right channel negative audio output Supply voltage terminal for power stage Right channel headphone input,selected when HP/LINE is held high Right channel line input, selected when HP/LINE is held low Common right channel input for fully defferential input. AC ground for single-ended inputs. Supply voltage terminal Common left channel input for fully differential input. AC ground for single-ended inputs. Left channel line input, selected when HP/LINE is held low Left channel headphone input,selected when HP/LINE is held high. Left channel negative audio output Left channel positive audio output. Places the amplifier in shutdown mode if a TTL logic low is placed on this terminal. Places the amplifier in fade mode if a logic low is placed on this termnal; normal operation if a logic high is placed on this terminal. Tap to voltage divider for internal midsupply bias generator used for analog reference. Analog power supply ground Sets the maximum volume for single ended operation.DC voltage range is 0 to VDD Sets the difference between BTL volume and SE volme. DC voltage range is 0 to VDD Terminal for dc volume control. DC voltage range is 0 to VDD Input MUX control. When logic high,RHPIN and LHPIN inputs are selected. When logic low,RLINEIN and LLINEIN inputs are selected Output MUX control. When this terminal is high,SE outputs are selected.When this terminal is low, BTL outputs are selected Right channel positive audio output.
Function
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V.1.3 Revised April 02,2007
SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
MAXIMUM RATINGS (Ta = 40~85oC)
over operating free-air temperature range (unless otherwise noted) Characteristic Supply Voltage, VDD, PVDD Input Voltage Continous total power dissipation Operating free-air temperature range Operaing junction temperature range Storage temperature range Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds Symbol VSS VI TA TJ Tstg Rating -0.3 ~ 6 - 0.3 ~ VDD +0.3 See Dissipation Rating Table - 40 ~ 85 - 40 ~ 150 - 65 ~ 150 260
o o o o
Unit V V C C C C
(Note) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommend operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
DISSIPATION RATING TABLE
PACKAGE
SOP /SSOP
TA25C Power Rating
2.7mW
Derating Factor Above TA=25C
21.8 mW/C
TA=70C Power Rating
1.7W
TA=85C Power Rating
1.4W
RECOMMENDED OPERATING CONDITION
Characteristic Supply Voltage, VDD, PVDD High-level input voltage Symbol VSS VIH SHUTDOWN SE/BTL, HP/LINE, FADE Low-level input voltage VIL SHUTDOWN Operating free-air temperature TA --40 Condition -SE/BTL, HP/LINE, FADE Min. 4.0 0.8 VDD 2.0 0.6 VDD 0.85 85
o
Typ.
Max. 5.5
Unit V V
V
C
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V.1.3 Revised April 02,2007
SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
ELECTRICAL CHARACTERISTICS (VDD =PVDD = 5.5V, Ta = 25oC unless otherwise noted)
Characteristic Output offset voltage (measured differentially) Power supply rejection ratio High-level input current(SE/BTL,FADE HP/LINE,SHUTDOWN,SEMAX) High-level input current (SEDIFF,VOLUME) Low-level input current(SE/BTL,FADE HP/LINE,SHUTDOWN,SEMAX) Supply current, no load Symbol VOO PSRR llH llH llL Condition VDD=5.5V,Gain=20dB, SE/BTL=0V VDD=PVDD=4.0V to 5.5V VDD=PVDD=5.5V, Vl=VDD=PVDD -42 -70 1 150 1 5.5 3.0 8.0 5.0 1.5 1 20 10 6.0 mA Min. Typ. Max. 60 Unit mV dB uA uA uA
VDD=PVDD=5.5V , Vl=0V VDD=PVDD=5.5V,SE/BTL=0V, SHUTDOWN=2V VDD=PVDD=5.5V,SE/BTL=5.5V, SHUTDOWN=2V VDD=5V=PVDD,SE/BTL=0V, SHUTDOWN=2V,RL=3, PO=2W,Stereo SHUTDOWN=0.0V
lDD
Supply current,max power into a 3 load Supply current,shutdown mode
lDD lDD(SD)
ARMS uA
OPERATING CHARACTERISTICS (VDD =PVDD = 5V, RL = 3, Gain = 6dB, Ta = 25oC unless otherwise noted)
Characteristic Output Power Total harmonic distortion+noise High-level output voltage Low-level output voltage Bypass voltage(Nominally VDD/2) Maximum output power bandwidth Supply ripple rejection ratio Noise output voltage Symbol PO THD+N VOH VOL V(BYPASS) BOM Condition THD=1%, f=1 kHz THD=10%, f=1 kHz, VDD=5.5V PO =1W, RL=8, f=20Hz to 20kHz RL=8, Measured between output and VDD RL=8, Measured between output and GND Measured at pin 17, No load, VDD=5.5V
THD=5%
Min.
Typ. 2 3 <0.6
Max.
Unit W %
500 400 2.65 2.75 >20 2.85
mV mV V kHz dB VRMS
f=1 kHz, Gain = 0 dB, C(BYP) = 1.0uF f= 20 Hz to 20 kHz, Gain=0 dB, C(BYP)= 1.0 uF
BTL SE BTL
-63 -57 40
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SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
FUNCTIONAL BLOCK DIAGRAM
RHPIN RLINEIN RIN
R MUX HP/LINE
_ + BYP BYP
_ +
ROUT+
+ _
_ + BYP SE/BTL EN
ROUT-
SE/BTL HP/LINE
MUX Control Power Management 32-Step Volume Control
PVDD PGND VDD BYPASS SHUTDOWN AGND
VOLUME SEDIFF SEMAX FADE
LHPIN LLINEIN LIN
L MUX HP/LINE
_ + BYP BYP
_ +
LOUT+
+ _
_ + BYP SE/BTL EN
LOUT-
NOTE: All resistor wipers are adjusted with 32 step volume control.
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SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
Table 1. DC Volume Control (BTL Mode, VDD=5V)
VOLUME (PIN 21) FROM (V) 0.00 0.31 0.42 0.54 0.65 0.76 0.87 0.98 1.10 1.21 1.32 1.43 1.54 1.66 1.77 1.88 1.99 2.10 2.21 2.33 2.44 2.55 2.67 2.77 2.89 3.00 3.11 3.22 3.33 3.44 3.55 3.67 TO (V) 0.23 0.34 0.46 0.56 0.67 0.79 0.90 1.01 1.12 1.24 1.35 1.46 1.57 1.68 1.79 1.91 2.02 2.13 2.24 2.35 2.47 2.57 2.70 2.80 2.92 3.03 3.14 3.26 3.37 3.48 3.60 5.00 GAIN OF AMPLIFIER (Typ.) -85 -40 -38 -36 -34 -32 -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
Table 2. DC Volume Control (SE Mode, VDD=5V)
SE_VOLUME=VOLUME-SEDIFF or SEMAX FROM (V) 0.00 0.31 0.42 0.54 0.65 0.76 0.87 0.98 1.10 1.21 1.32 1.43 1.54 1.66 1.77 1.88 1.99 2.10 2.21 2.33 2.44 2.55 2.67 2.77 2.89 3.00 3.11 3.22 3.33 3.44 3.55 3.67 TO (V) 0.23 0.34 0.46 0.56 0.67 0.79 0.90 1.01 1.12 1.24 1.35 1.46 1.57 1.68 1.79 1.91 2.02 2.13 2.24 2.35 2.47 2.57 2.70 2.80 2.92 3.03 3.14 3.26 3.37 3.48 3.60 5.00 GAIN OF AMPLIFIER (Typ.) -85 -46 -44 -42 -40 -38 -36 -34 -32 -30 -28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
APPLICATION INFORMATION
The figure is schematic diagrams of typical notebook computer application circuits. Right Speaker 1 Cs 2 3 Ci Ci Ci VDD Cs Ci
Left Line Audio Source Left HP Audio Source Power Supply
PGND ROUTPVDD RHPIN RLINEIN RIN VDD LIN LLINEIN LHPIN PVDD LOUT-
ROUT+ SE/BTL HP/LINE VOLUME SEDIFF SEMAX AGND BYPASS FADE SHUTDOWN LOUT+ PGND
24 23 22 21 20 19 18 17 16
VDD
100k 100k
Cc
Power Supply Right HP Audio Source Right Line Audio Source
4 5 6 7 8 9 10 11
1k
In From DAC or Potentiometer (DC Voltage) Headphones
C(BYP)
1k
Ci Ci
Cc 15 14 13
System Control
Cs
12
Left Speaker
Figure 1. SM7511 Application Circuit Using Single-Ended Inputs and Input MUX
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
APPLICATION INFORMATION ( continued )
The figure is schematic diagrams of typical notebook computer application circuits. Right Speaker 1 Cs 2 3 4 Ci Ci VDD Cs Ci Ci 7 8 9 10 11 Cs 12 5 6 PGND ROUTPVDD RHPIN RLINEIN RIN VDD LIN LLINEIN LHPIN PVDD LOUTROUT+ SE/BTL HP/LINE VOLUME SEDIFF SEMAX AGND BYPASS FADE SHUTDOWN LOUT+ PGND 24 23 22 21 20 19 18 17 16 Cc 15 14 13
System Control In From DAC or Potentiometer (DC Voltage) Headphones 1k
VDD
100k 100k
Cc
Power Supply
NC
Right Negative Differential Input Signal Right Positive Differential Input Signal
Left Positive Differential Input Signal Left Negative Differential Input Signal
C(BYP)
1k
NC
Power Supply
Left Speaker
Figure 2. SM7511 Application Circuit Using Differential Inputs
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
SE/BTL OPERATION
The ability of the SM7511 to easily switch between BTL and SE modes is one of its most important cost saving features. This feature eliminates the requirement for an additional headphone amplifier in applications where internal stereo speakers are driven in BTL mode but external headphone or speakers must be accommodated. Internal to the SM7511, two separate amplifiers drive OUT+ and OUT-. The SE/BTL input controls the operation of the follower amplifier that drives LOUT- and ROUT-. When SE/BTL is held low, the amplifier is on and the SM7511 is in the BTL mode. When SE/BTL is held high, the OUT- amplifiers are in a high output impedance state, which configures the SM7511 as an SE driver from LOUT+ and ROUT+. IDD is reduced by approximately one-third in SE mode. Control of the SE/BTL input can be from a logic-level CMOS source or, more typically, from a resistor divider network as shown in Figure 3. The trip level for the SE/BTL input can be found in the recommended operating condition table.
APPLICATION INFORMATION (continued)
4
RHPIN 5 RLINEIN 22 6
R MUX Input MUX Control
_ + BYP
_ +
ROUT+ 24
HP/LINE RIN
BYP + _ BYP _ + EN SE/BTL ROUT2
VDD
100K
Co
330F 1K
23 100K
LOUT+
Figure 3. SM7511 Resistor Divider Network Circuit
Using a 1/8-in. (3,5mm) stereo headphone jack, the control switch is closed when no plug is inserted. When closed the 100K/1K divider pulls the SE/BTL input low. When a plug is inserted, the 1K resistor is disconnected and SE/BTL input is pulled high. When the input goes high, the OUT- amplifier is shut down causing the speaker to mute (open-circuits the speaker). The OUT+ amplifier then drives through the output capacitor (CO) into the headphone jack.
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V.1.3 Revised April 02,2007
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
HP/LINE OPERATION
The HP/LINE input controls the internal input multiplexer (MUX). Refer to the block diagram in Figure 3. This allows the device to switch between two separate stereo inputs to the amplifier. For design flexibility, the HP/LINE control is independent of the output mode, SE or BTL, which is cotrolled by the aforementioned SE/BTL pin. To allow the amplifier to switch from the LINE inputs to the HP inputs when the output switches from BTL mode to SE mode, simply connect the SE/BTL control input to the HP/LINE input. When this input is logic high, the RHPIN and LHPIN inputs are selected. When this terminal is logic low, the RLINEIN and LLINEIN inputs are selected. This operation is also detailed in Table 3 and the trip levels for a logic low (VIL) or logic high (VIH) can be found in the recommended operating conditions table.
Table 3. HP/LINE, SE/BTL, and Shudown Functions
INPUTS (1) HP/LINE X Low Low High High SE/BTL X Low High Low High SHUTDOWN Low High High High High AMPLIFIER STATE INPUT X LINE LINE HP HP OUTPUT MUTE BTL SE BTL SE
(1) Inputs should never be left unconnected
SHUTDOWN MODES
The SM7511 employs a shutdown mode of operation designed to reduce supply current (IDD) to the absolute minimum level during periods of nonuse for battery-power conservation. The SHUTDOWN input terminal should be held high during normal operation when the amplifier is in use. Pulling SHUTDOWN low causes the outputs to mute and the amplifier to enter a low-current state, IDD= 20A. SHUTDOWN should never be left unconnected because amplifier operation would be unpredictable.
FADE OPERATION
For design flexibility, a fade mode is provided to slowly ramp up the amplifier gain when coming out of shutdown mode and conversely ramp the gain down when going into shutdown. This mode provides a smooth transition between the active and shutdown states and virtually eliminates any pops or clicks on the outputs. When the FADE input is a logic low, the device is placed into fade-on mode. A logic high on this pin places the amplifier in the fade-off mode. The voltage trip levels for a logic low (VIL) or logic high (VIH) can be found in the recommended operating conditions table. When a logic low is applied to the FADE pin and a logic low is then applied on the SHUTDOWN pin, the channel gain steps down from gain step to gain step at a rate of two clock cycles per step. With a nominal internal clock frequency of 58Hz, this equates to 34 ms per step. The gain steps down until the lowest gain step is reached. The time it takes to reach this step depends on the gain setting prior to placing the device in shutdown. For example, if the amplifier is in the highest gain mode of 20 dB, the time it takes to ramp down the channel gain is 1.05 seconds. This number is calculated by taking the number of steps to reach the lowest gain from the highest gain, or 31 steps, and multiplying by the time per step, or 34 ms.
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
After the channel gain is stepped down to the lowest gain, the amplifier begins discharging the bypass capacitor from the nominal voltage of VDD/ 2 to ground. This time is dependent on the value of the bypass capacitor. For a 0.47F capacitor that is used in the application diagram in Figure 1, the time is approximately 500 ms. This time scales linearly with the value of bypass capacitor. For example, if a 1F capacitor is used for bypass, the time period to discharge the capacitor to ground is twice that of the 0.47F capacitor, or 1 seconds. Figure 3 below is a waveform captured at the output during the shutdown sequence when the part is in fade-on mode. The gain is set to the highest level and the output is at VDD when the amplifier is shut down. When a logic high is placed on the SHUTDOWN pin and the FADE pin is still held low, the device begins the start-up process. The bypass capacitor will begin charging. Once the bypass voltage reaches the final value of VDD/2, the gain increases in 2 dB steps from the lowest gain level to the gain level set by the dc voltage applied to the VOLUME, SEDIFF and SEMAX pins. In the fade-off mode, the amplifier stores the gain value prior to starting the shutdown sequences. The output of the amplifier immediately drops to VDD/2 and the bypass capacitor begins a smooth discharge to ground. When shutdown is released, the bypass capacitor charges up to VDD/2 and the channel gain returns immediately to the value stored in memory. Figure 4 below is a waveform captured at the output during the shutdown sequence when ths part is in the fade-off mode. The gain is set to the highest level, and the output is at VDD when the amplifier is shut down. The power-up sequence is different from the shutdown sequence and the voltage on the FADE pin does not change the power-up sequence. Upon a power-up condition, the SM7511 begins in the lowest gain setting and steps up 2 dB every 2 clock cycles until the final value is reached as determined by the dc voltage applied to the VOLUME, SEDIFF and SEMAX pins.
Figure 4. Shutdown Sequence in the Fade-on mode
Figure 5. Shutdown Sequence in the Fade-off mode
VOLUME, SEDIFF AND SEMAX OPERATION
Three pins labeled VOLUME, SEDIFF and SEMAX control the BTL volume when driving speakers and the SE volume when driving headphones. All of these pins are controlled with a dc voltage, which should not exceed VDD. When driving speakers in BTL mode, the VOLUME pin is the only pin that controls the gain. Table 1 shows the gain for the BTL mode. The voltage listed in the table are for VDD=5V. For a different VDD, the values in the table scale linearly. If VDD=4V, multiply all the voltages in the table by 4V/5V or 0.8.
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
The SM7511 allows the user to specify a difference between BTL gain and SE gain. This is desirable to avoid any listening discomfort when plugging in headphones. When switching to SE mode, the SEDIFF and SEMAX pins control the single-ended gain proportional to the gain set by the voltage on the VOLUME pin. When SEDIFF =0V, the difference between the BTL gain and the SE gain is 6dB. As the voltage on the SEDIFF terminal is increased, the gain in SE mode decreases. The voltage on the SEDIFF terminal is subtracted from the voltage on the VOLUME terminal and this value is used to determine the SE gain. Some audio systems require that the gain be limited in the single-ended mode to a level that is comfortable for headphone listening. Most volume control devices only have one terminal for setting the gain. For example, if the speaker gain is 20 dB, the gain in the headphone channel is fixed at 14 dB. The level of gain could cause discomfort to listeners and the SEMAX pin allows the designer to limit this discomfort when plugging in headphones. The SEMAX terminal controls the maximum gain for single-ended mode. The funtionality of the SEDIFF and SEMAX pin are combined to set the SE gain. A block diagram of the combined funtionality is shown in Figure 6. The value obtained from the block diagram for SE_VOLUME is a dc voltage that can be used in conjunction with Table 2 to determine the SE gain. Again, the voltage listed in the table are for VDD=5V. The values must be scaled for other values of VDD. Table 1 and Table 2 show a range of voltages for each gain step. There is a gap in the voltage between each gain step. This gap represents the hysteresis about each trip point in the internal comparator. The hysteresis ensures that the gain control is monotonic and does not oscillate from one gain step to another. If a potentiometer is used to adjust the voltage on the control terminals, the gain increases as the potentiometer is turned in one direction and decreases as it is turned back the other direction. The trip point, where the gain actually changes, is different depending on whether the voltage is increased or decreased as a result of the hysteresis about each trip point. The gaps in Table 1 and Table 2 can also be thought of as indeterminate states where the gain could be in the next higher gain step or the lower gain step depending on the direction the voltage is changing. If using a DAC to control the volume, set the volume, set the voltage in the middle of each range to ensure that the desired gain is achieved. A pictorial representation of the volume control can be found in Figure 7. The graph focuses on three gain steps with the trip points defined in Table 1 for BTL gain. The dotted line represents the hysteresis about each gain step. SEDIFF(V) SEMAX(V)
VOLUME(V)
+
VOLUME-SEDIFF
Is SEMAX> (VOLUME-SEDIFF)?
YES
SE_VOLUME(V)=VOLUME(V)-SEDIFF(V)
SE_VOLUME(V)=SEMAX(V)
Figure 6. Block Diagram of SE Volume Control
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
4
BTL Gain-dB
2
0
2.92
3.0 3.03
2.81
Voltage on VOLUME Pin-V
Figure 7. DC Volume Control Operation TABLE OF GRAPHS
FIGURE THD+N Total harmonic distortion plus noise(BTL) THD+N Total harmonic distortion plus noise(SE) Closed loop response Crosstalk PSRR Power supply ripple rejection(BTL) PSRR Power supply ripple rejection(SE) Vn Output noise voltage
TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY THD+N-Total Harmonic Distortion +Noise-% THD+N-Total Harmonic Distortion +Noise-%
vs Frequency vs Output power vs Frequency vs Output power vs Frequency vs Frequency vs Frequency vs Frequency
8,9,10 12,13,14,15,16,17,18,19 11 21,22,23 24,25 26,27 28 29 30
TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY
f-Frequency-Hz
f-Frequency-Hz
Figure-8
Figure-9
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SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY THD+N-Total Harmonic Distortion +Noise-% THD+N-Total Harmonic Distortion +Noise-%
TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY
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V.1.10 Dec 21,2005
f-Frequency-Hz
f-Frequency-Hz
Figure-10
Figure-11
TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER THD+N-Total Harmonic Distortion +Noise-% THD+N-Total Harmonic Distortion +Noise-%
TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER
Po-Output Power - W
Po-Output Power - W
Figure-12
Figure-13
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V.1.3 Revised April 02,2007
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER THD+N-Total Harmonic Distortion +Noise-% THD+N-Total Harmonic Distortion +Noise-% TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER
Po-Output Power - W
Po-Output Power - W
Figure-14
Figure-15
TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER THD+N-Total Harmonic Distortion +Noise-% THD+N-Total Harmonic Distortion +Noise-%
TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER
Po-Output Power - W
Po-Output Power - W
Figure-16
Figure-17
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V.1.3 Revised April 02,2007
SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER THD+N-Total Harmonic Distortion +Noise-% THD+N-Total Harmonic Distortion +Noise-%
TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER
Po-Output Power - W
Po-Output Power - W
Figure-18
Figure-19
TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER THD+N-Total Harmonic Distortion +Noise-% THD+N-Total Harmonic Distortion +Noise-%
TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER
Po-Output Power - W
Po-Output Power - W
Figure-20
Figure-21
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V.1.3 Revised April 02,2007
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER THD+N-Total Harmonic Distortion +Noise-% THD+N-Total Harmonic Distortion +Noise-% TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER
Po-Output Power - W
Po-Output Power - W
Figure-22
Figure-23
CLOSED LOOP RESPONSE
CLOSED LOOP RESPONSE
Closed Loop Gain-dB
Closed Loop Gain-dB
Phase - Degrees
Phase - Degrees
f-Frequency-Hz
f-Frequency-Hz
Figure-24
Figure-25
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
CROSSTALK vs FREQUENCY CROSSTALK vs FREQUENCY
Crosstalk -dB
f-Frequency-Hz
Crosstalk -dB
f-Frequency-Hz
Figure-26
Figure-27
POWER SUPPLY REJECTION RATIO vs FREQUENCY
POWER SUPPLY REJECTION RATIO vs FREQUENCY
PSRR-Power Supply Rejection Ratio - dB
PSRR-Power Supply Rejection Ratio - dB
f-Frequency-Hz
f-Frequency-Hz
Figure-28
Figure-29
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
OUTPUT NOISE VOLTAGE vs FREQUENCY
Vn - Output Noise Voltage - uVrms
f-Frequency-Hz
Figure-30
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3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
PACKAGE OUTLINE
SM7511 24 PIN TSSOP ( 150mil ) Unit : mm
Thermal Pad
D
(NOTE 5)
C
24
13
L E1 E Gauge plane 0.2000 A2 A1 DESIGN 6. FOLLOWED FROM JEDEC MO-153 A
1
12
12(4X)
e
b
y
SYMBOLS A A1 A2 b C D E E1 e L y L1
MIN. 0.00 0.80 0.19 0.09 7.70 6.20 4.30 0.45 0 0.90
NOM. 1.00 7.80 6.40 4.40 0.65 0.60 1.00
MAX. 1.15 0.10 1.05 0.30 0.20 7.90 6.60 4.50 0.75 0.10 8 1.10
NOTES: 1. PACKAGE BODY SIZE EXCLUDE MOLD FLASH PROTRUSION OR GATE BURRS. 2. TOLERANCE 0.1mm UNLESS OTHERWISE SPECIFIED 3. COPLANARITY0.1mm 4. CONTROLLING DIMENSION IS MILLIMETER. CONVERTED INCH DIMENSION ARE NOT NECESSARILY EXACT. 5. DIE PAD EXPOSURE SIZE IS ACCORDING TO LEAD FRAME
Page 21
V.1.3 Revised April 02,2007
L1
SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
Ordering Information
Package TSSOP-24
Marking SM7511
Part Number ( Tape and Reel ) SM7511
Lead Free Information
Package TSSOP-24 Marking SM7511L Lead Free Part Number SM7511L
Green Information
Package TSSOP-24 Marking SM7511G Green Part Number SM7511G
Page 22
V.1.3 Revised April 02,2007

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