三合微科股份有限公司 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. 台北縣新店市民權路100號7樓 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 : [email protected] SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL GENERAL DESCRIPTION FEATURES The SM7497 is a stereo Class AB audio power amplifier that drives 3 W/channel of continuous RMS power into a 16-Ω load. Advanced dc volume control minimizes external components.TV and monitor benefit from the integrated feature set that minimizes external components without sacrificing functionality. * 32-step DC volume control * Mute and shutdown mode * Short circuit and thermal protection * SE and BTL selector * 3 W Into 16 -Ω Speakers * Input MUX * Depop circuitry APPLICATIONS * Small panel LCD TV PIN ASSIGNMENTS (TOP VIEW) LLINEIN 1 12 VDD * LCD Monitors PVDD 2 11 RLINEIN * Portable DVD LOUT+ 3 10 ROUT+ * Mini speaker * Digital broadcast system GND GND LOUT- 4 9 ROUT- SHUTDOWN 5 8 SE/BTL BYPASS 6 7 VOLUME 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. Pin name I/O Function 1 LLINEIN I Left channel input signal. 2 PVDD - Supply voltage terminal for right power stage. 3 LOUT + O Left channel positive audio output. 4 LOUT - O Left channel negative audio output. 5 SHUTDOWN I Places the amplifier in shutdown mode if a TTL logic low is placed on This terminal. 6 BYPASS I Tap to voltage divider for internal midsupply bias generator used for analog reference. 7 VOLUME I Terminal for DC volume control. DC voltage range is 0V to 5V. 8 SE/BTL I Output MUX control. When this terminal is high, SE outputs are selected. When this terminal is low, BTL outputs are selected. 9 ROUT - O Right channel negative audio output. 10 ROUT + O Right channel positive audio output. 11 RLINEIN I Right channel input signal. 12 VDD - Supply voltage terminal. GND - Power ground. 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 Symbol Supply Voltage Rating Unit VDD -0.3 ~ 14.5 V VI - 0.3 ~ VDD +0.3 Input Voltage - 40 ~ 85 C - 40 ~150 o C Tstg - 65 ~150 o C - 260 o C Operating free-air temperature range TA Operaing junction temperature range Storage temperature range V o TJ Lead temperature 1.6 mm (1/16 inch) from case for 10 seconds RECOMMENDED OPERATING CONDITION Characteristic Symbol Condition Min. Supply Voltage VDD -- High-level input voltage VIH Low-level input voltage VIL Operating free-air temperature TA Max. Unit 9.0 13.5 V SHUTDOWN , SE/BTL 4.0 VDD V SHUTDOWN , SE/BTL 0 0.8 V - 40 85 -- Page 3 Typ. o C 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 Test Conditions Symbol Min. Typ. Max. Unit Supply current IDD No load 25 40 mA Shutdown current ISD SHUTDOWN=0V, SE/BTL=0V 1 20 uA Short to GND current limit I Short Output offset voltage (measured differentially) 1.1 VIN = 0V, RL = 900mΩ VOO Gain=20dB, SE/BTL=0V llH Vl = VDD = PVDD A 50 High-level input current mV 1 (SE/BTL,SHUTDOWN,) uA Volume 150 Low-level input current llL (SE/BTL,SHUTDOWN,VOLUME, ) Bypass voltage (Nominally VDD/2) 1 VI= 0V V(BYPASS) Measured at pin 6,No load (1) uA 6 V OPERATING CHARACTERISTICS (VDD =PVDD =12V, RL =16Ω, Gain = 6dB, Ta = 25oC unless otherwise noted) Characteristic Output Power (2) Symbol PO Test Conditions THD+N=1%, f=1kHz, RL=16Ω ,BTL mode , Gain=20dB THD+N=10%, f=1kHz, RL=16Ω ,BTL mode , Gain=20dB THD+N=1%, f=1kHz, RL=8Ω ,SE mode , Gain=14dB THD+N=10%, f=1kHz, RL=8Ω ,SE mode , Gain=14dB Min. Typ. Max. Unit 2.7 3.2 W 1.4 1.7 High-level output voltage VOH Measured between output and VDD 600 mV Low-level output voltage VOL Measured between output and GND 400 mV Supply current, max Power into a 16 Ω load IDD 1.5 ARMS Total harmonic distortion+noise Maximum output power bandwidth Noise output voltage (3) THD + N BOM 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 0.1 % > 20 kHz 36 μVRMS (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) Speaker volume (dB) Headphone volume (dB) 0 ~ 0.65 -65 -70 0.65 ~ 0.79 -39.5 -45.4 0.79 ~ 0.91 -37.6 -43.6 0.91 ~ 1.05 -35.6 -41.6 1.05 ~ 1.18 -33.5 -39.5 1.18 ~ 1.30 -31.7 -37.7 1.30 ~ 1.44 -29.6 -35.7 1.44 ~ 1.56 -27.7 -33.7 1.56 ~ 1.70 -25.9 -32.0 1.70 ~ 1.82 -23.8 -29.8 1.82 ~ 1.96 -22.1 -28.1 1.96 ~ 2.08 -20.0 -26.0 2.08 ~ 2.21 -18.0 -24.1 2.21 ~ 2.35 -15.9 -21.9 2.35 ~ 2.47 -13.9 -20.0 2.47 ~ 2.59 -12.0 -18.1 2.59 ~ 2.73 -10.0 -16.0 2.73 ~ 2.85 -7.97 -14.0 2.85 ~ 2.99 -5.97 -12.0 2.99 ~ 3.12 -4.00 -10.0 3.12 ~ 3.24 -2.01 -8.04 3.24 ~ 3.38 0.01 -6.01 3.38 ~ 3.50 1.98 -4.05 3.50 ~ 3.64 3.96 -2.07 3.64 ~ 3.76 5.97 0.05 3.76 ~ 3.89 7.98 1.96 3.89 ~ 4.02 9.96 3.95 4.02 ~ 4.15 12.0 5.95 4.15 ~ 4.29 13.9 7.93 4.29 ~ 4.41 15.9 9.92 4.41 ~ 4.53 18.0 11.9 4.53 ~ 5.00 19.9 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 16Ω speaker outputs and volume control 1 2 3 D VDD + 10 uf 2 , 12 0.1 uf PVDD / VDD 5 SHUTDOWN SE / BTL Right Audio Input 1.0 uf C 11 8 ROUT + 10 ROUT - 9 LOUT + 3 LOUT - 4 BYPASS 6 RLINEIN SM7497 SM7498HL Left Audio Input 1.0 uf 1 LLINEIN B VDD 7 5K VOLUME 1 uf 0.1 uf 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 8Ω speaker outputs and volume control 1 2 3 VDD + 10 uf 2 , 12 0.1 uf PVDD / VDD 5 8 SHUTDOWN SE / BTL 470 uf ROUT + 1.0 uf 11 10 + Right Audio Input RLINEIN ROUT - 9 SM7497 LOUT + 1.0 uf 1 470 uf 3 + Left Audio Input LLINEIN LOUT - 4 BYPASS 6 VDD 7 5K VOLUME 1 uf 0.1 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 TOTAL HARMONIC DISTORTION +NOISE vs. OUTPUT POWER VDD=12V RL = 8 ohms Gain = 14dB SE Mode THD+N (%) THD+N (%) VDD=12V RL = 16 ohms Gain = 20dB BTL Mode 20KHz 20Hz 20KHz 100Hz 1 KHz 1 KHz OUTPUT POWER (W) OUTPUT POWER (W) Figure 3 Figure 4 TOTAL HARMONIC DISTORTION +NOISE vs. OUTPUT POWER TOTAL HARMONIC DISTORTION +NOISE vs. OUTPUT POWER VDD=9V RL = 16 ohms Gain = 20dB BTL Mode 20KHz 20Hz THD+N (%) THD+N (%) VDD=13.5V RL = 16 ohms Gain = 20dB BTL Mode 20KHz 20Hz 1 KHz 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 TOTAL HARMONIC DISTORTION +NOISE vs. FREQUENCY VDD=12V RL =8 ohms Po = 1W SE Mode THD+N (%) THD+N (%) VDD=12V RL = 16 ohms Po = 2W BTL Mode 6 dB 20 dB 0 dB 14 dB FREQUENCY (Hz) FREQUENCY (Hz) Figure 7 Figure 8 AMPLITUDE-dB PHASE-Degrees CLOSED LOOP RESPONSE PHASE-Degrees AMPLITUDE-dB CLOSED LOOP RESPONSE VDD=12V RL = 8 ohms Gain = 14 dB Po = 1 W SE Mode VDD=12V RL = 16 ohms Gain = 20 dB Po = 2W BTL Mode FREQUENCY (Hz) FREQUENCY (Hz) Figure 9 Figure 10 Page 9 V.0.1 Sep 11,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL AMPLITUDE-dB VDD=12V RL = 16 ohms Gain = 20 dB Po = 1 W BTL Mode Left to Right OUTPUT NOISE VOLTAGE vs.FREQUENCY OUTPUT NOISE VOLTAGE (uVrms) CROSSTALK vs.FREQUENCY VDD=12V RL = 16 ohms BW = 22Hz to 22KHz BTL Mode 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 Unit : mm SM7497 12 PIN HDIP 19.10 ± 0.20 6.35 ± 0.20 10°max 7.62 TYP K 1.00 TYP K1 0.51 min 3.00 min 2.54 TYP BASE METAL 3.00 TYP J J1 3.30±0.20 WHITE PLATING 0.457 TYP 1.524 TYP MILLIMETERS 4.06 TYP Page 11 INCHES DIM MIN MAX MIN MAX J 0.219 0.339 0.0086 0.0133 J1 0.219 0.289 0.0086 0.0114 K 0.460 0.560 0.0181 0.0220 K1 0.460 0.510 0.0181 0.0201 V.0.1 Sep 11,2007