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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 SM7497 is a stereo Class AB audio power amplifier that drives 3 W/channel of continuous RMS power into a 16- load. Advanced dc volume control minimizes external components.TV and monitor benefit from the integrated feature set that minimizes external components without sacrificing functionality. FEATURES * 32-step DC volume control * Mute and shutdown mode * Short circuit and thermal protection * SE and BTL selector * 3 W Into 16 - Speakers * Input MUX * Depop circuitry APPLICATIONS PIN ASSIGNMENTS (TOP VIEW) LLINEIN PVDD LOUT+ GND LOUTSHUTDOWN BYPASS 4 5 6 9 8 7 1 2 3 12 11 10 VDD RLINEIN ROUT+ GND ROUTSE/BTL VOLUME * Small panel LCD TV * LCD Monitors * Portable DVD * Mini speaker * Digital broadcast system SM7497 HDIP 12PIN Page 1 V.0.1 Sep 11,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL PIN DESCRIPTIONS No. 1 2 3 4 5 6 7 8 9 10 11 12 Pin name LLINEIN PVDD LOUT + LOUT SHUTDOWN BYPASS VOLUME SE/BTL ROUT ROUT + RLINEIN VDD GND I/O I O O I I I I O O I Left channel input signal. Supply voltage terminal for right power stage. Left channel positive audio output. Left channel negative audio output. Places the amplifier in shutdown mode if a TTL logic low is placed on This terminal. Tap to voltage divider for internal midsupply bias generator used for analog reference. Terminal for DC volume control. DC voltage range is 0V to 5V. Output MUX control. When this terminal is high, SE outputs are selected. When this terminal is low, BTL outputs are selected. Right channel negative audio output. Right channel positive audio output. Right channel input signal. Supply voltage terminal. Power ground. Function Page 2 V.0.1 Sep 11,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL MAXIMUM RATINGS (Ta = 40~85oC) Characteristic Supply Voltage Input Voltage 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 VDD VI TA TJ Tstg Rating -0.3 ~ 14.5 - 0.3 ~ VDD +0.3 - 40 ~ 85 - 40 ~150 - 65 ~150 260 Unit V V o o o o C C C C RECOMMENDED OPERATING CONDITION Characteristic Supply Voltage High-level input voltage Low-level input voltage Operating free-air temperature Symbol VDD VIH VIL TA Condition -SHUTDOWN , SE/BTL SHUTDOWN , SE/BTL -Min. 9.0 4.0 0 - 40 Typ. Max. 13.5 VDD 0.8 85 Unit V V V o C Page 3 V.0.1 Sep 11,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL ELECTRICAL CHARACTERISTICS (VDD =PVDD = 12V, Ta = 25oC unless otherwise noted) Characteristic Supply current Shutdown current Short to GND current limit Output offset voltage (measured differentially) High-level input current (SE/BTL,SHUTDOWN,) Symbol IDD ISD I Short VOO No load Test Conditions Min. Typ. 25 1 1.1 Max. 40 20 Unit mA uA A SHUTDOWN=0V, SE/BTL=0V VIN = 0V, RL = 900m Gain=20dB, SE/BTL=0V 50 1 mV llH Vl = VDD = PVDD 150 uA Volume Low-level input current (SE/BTL,SHUTDOWN,VOLUME, ) llL VI= 0V 6 1 uA V Bypass voltage (Nominally VDD/2) V(BYPASS) Measured at pin 6,No load (1) OPERATING CHARACTERISTICS (VDD =PVDD =12V, RL =16, Gain = 6dB, Ta = 25oC unless otherwise noted) Characteristic Symbol Test Conditions THD+N=1%, f=1kHz, RL=16 ,BTL mode , Gain=20dB THD+N=10%, f=1kHz, RL=16 ,BTL mode , Gain=20dB THD+N=1%, f=1kHz, RL=8 ,SE mode , Gain=14dB THD+N=10%, f=1kHz, RL=8 ,SE mode , Gain=14dB Min. Typ. 2.7 3.2 1.4 1.7 Max. Unit Output Power (2) PO W High-level output voltage Low-level output voltage Supply current, max Power into a 16 load Total harmonic distortion+noise Maximum output power bandwidth Noise output voltage (3) VOH VOL IDD THD + N BOM Measured between output and VDD Measured between output and GND Output current PO=3W, Stereo repetitive peak PO =1W, f=1KHz, f=20Hz to 30kHz BTL Mode THD=5% Gain = 0dB,C(BYP) =1.0 uf 600 400 1.5 0.1 > 20 36 mV mV ARMS % kHz VRMS (1) At 9.0V < VDD < 13.5V the DC bypass voltage is approximately VDD/2 (2) Output power is measured at the output terminals of the IC. (3) Noise voltage is measured in a bandwidth of 22Hz to 22KHz. Page 4 V.0.1 Sep 11,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL Table 1. DC Volume Control (VDD = 12V, No Load, Volme pin = 5V) Voltage on volume pin (VDC) 0 ~ 0.65 0.65 ~ 0.79 0.79 ~ 0.91 0.91 ~ 1.05 1.05 ~ 1.18 1.18 ~ 1.30 1.30 ~ 1.44 1.44 ~ 1.56 1.56 ~ 1.70 1.70 ~ 1.82 1.82 ~ 1.96 1.96 ~ 2.08 2.08 ~ 2.21 2.21 ~ 2.35 2.35 ~ 2.47 2.47 ~ 2.59 2.59 ~ 2.73 2.73 ~ 2.85 2.85 ~ 2.99 2.99 ~ 3.12 3.12 ~ 3.24 3.24 ~ 3.38 3.38 ~ 3.50 3.50 ~ 3.64 3.64 ~ 3.76 3.76 ~ 3.89 3.89 ~ 4.02 4.02 ~ 4.15 4.15 ~ 4.29 4.29 ~ 4.41 4.41 ~ 4.53 4.53 ~ 5.00 Speaker volume (dB) -65 -39.5 -37.6 -35.6 -33.5 -31.7 -29.6 -27.7 -25.9 -23.8 -22.1 -20.0 -18.0 -15.9 -13.9 -12.0 -10.0 -7.97 -5.97 -4.00 -2.01 0.01 1.98 3.96 5.97 7.98 9.96 12.0 13.9 15.9 18.0 19.9 Headphone volume (dB) -70 -45.4 -43.6 -41.6 -39.5 -37.7 -35.7 -33.7 -32.0 -29.8 -28.1 -26.0 -24.1 -21.9 -20.0 -18.1 -16.0 -14.0 -12.0 -10.0 -8.04 -6.01 -4.05 -2.07 0.05 1.96 3.95 5.95 7.93 9.92 11.9 13.9 Page 5 V.0.1 Sep 11,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL APPLICATION INFORMATION Application circuit using the SM7497 in an LCD monitor with 16 speaker outputs and volume control 1 2 3 D VDD + 10 uf 0.1 uf 2 , 12 PVDD / VDD 5 SHUTDOWN SE / BTL 8 Right Audio Input C 1.0 uf 11 RLINEIN ROUT + 10 ROUT - 9 SM7497 SM7498HL Left Audio Input 1.0 uf 1 B LOUT + LLINEIN LOUT - 3 4 VDD 6 1 uf 0.1 uf 5K 7 BYPASS VOLUME A Figure 1. Typical Bridge-Tied-Load(BTL) audio amplifier application circuit for an LCD monitor Figure 1. Typical Bridge-Tied-Load(BTL) audio amplifier application circuit for an LCD monitor 1 2 3 Page 6 V.0.1 Sep 11,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL APPLICATION INFORMATION Application circuit using the SM7497 in an LCD monitor with 8 speaker outputs and volume control 1 2 3 VDD + 10 uf 0.1 uf 2 , 12 PVDD / VDD 5 8 SHUTDOWN SE / BTL 470 uf 10 + Right Audio Input 1.0 uf 11 RLINEIN ROUT ROUT + 9 SM7497 470 uf + Left Audio Input 1.0 uf 1 VDD LLINEIN LOUT + 3 LOUT - 4 5K 0.1 uf 7 BYPASS VOLUME 6 1 uf Figure2. Typical Single-Ended (SE) audio amplifier application circuit for an LCD monitor 1 2 3 Page 7 V.0.1 Sep 11,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL TOTAL HARMONIC DISTORTION +NOISE vs. OUTPUT POWER VDD=12V RL = 16 ohms Gain = 20dB BTL Mode TOTAL HARMONIC DISTORTION +NOISE vs. OUTPUT POWER VDD=12V RL = 8 ohms Gain = 14dB SE Mode THD+N (%) 20KHz THD+N (%) 20KHz 20Hz 1 KHz 100Hz 1 KHz OUTPUT POWER (W) OUTPUT POWER (W) Figure 3 Figure 4 TOTAL HARMONIC DISTORTION +NOISE vs. OUTPUT POWER VDD=13.5V RL = 16 ohms Gain = 20dB BTL Mode TOTAL HARMONIC DISTORTION +NOISE vs. OUTPUT POWER VDD=9V RL = 16 ohms Gain = 20dB BTL Mode THD+N (%) THD+N (%) 20KHz 20Hz 1 KHz 20KHz 20Hz 1 KHz OUTPUT POWER (W) OUTPUT POWER (W) Figure 5 Figure 6 Page 8 V.0.1 Sep 11,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL TOTAL HARMONIC DISTORTION +NOISE vs. FREQUENCY VDD=12V RL = 16 ohms Po = 2W BTL Mode TOTAL HARMONIC DISTORTION +NOISE vs. FREQUENCY VDD=12V RL =8 ohms Po = 1W SE Mode THD+N (%) 6 dB 20 dB THD+N (%) 0 dB 14 dB FREQUENCY (Hz) FREQUENCY (Hz) Figure 7 Figure 8 CLOSED LOOP RESPONSE CLOSED LOOP RESPONSE PHASE-Degrees AMPLITUDE-dB VDD=12V RL = 16 ohms Gain = 20 dB Po = 2W BTL Mode VDD=12V RL = 8 ohms Gain = 14 dB Po = 1 W SE Mode FREQUENCY (Hz) FREQUENCY (Hz) Figure 9 Figure 10 Page 9 V.0.1 Sep 11,2007 PHASE-Degrees AMPLITUDE-dB SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL CROSSTALK vs.FREQUENCY OUTPUT NOISE VOLTAGE vs.FREQUENCY Left to Right OUTPUT NOISE VOLTAGE (uVrms) VDD=12V RL = 16 ohms Gain = 20 dB Po = 1 W BTL Mode VDD=12V RL = 16 ohms BW = 22Hz to 22KHz BTL Mode AMPLITUDE-dB 20 dB 0 dB FREQUENCY(Hz) FREQUENCY(Hz) Figure 11 Figure 12 Page 10 V.0.1 Sep 11,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL PACKAGE OUTLINE SM7497 12 PIN HDIP Unit : mm 19.10 0.20 6.35 0.20 7.62 TYP 10max 1.00 TYP K K1 3.300.20 J1 BASE METAL 3.00 TYP 0.457 TYP 0.51 min 3.00 min 2.54 TYP WHITE PLATING 1.524 TYP 4.06 TYP MILLIMETERS DIM J J1 K K1 MIN 0.219 0.219 0.460 0.460 MAX 0.339 0.289 0.560 0.510 INCHES MIN 0.0086 0.0086 0.0181 0.0181 MAX 0.0133 0.0114 0.0220 0.0201 Page 11 V.0.1 Sep 11,2007 J |
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