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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 SM7498HL 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) LPGND LOUTLOUTMUTE SHUTDOWN BYPASS GND 1 2 3 4 5 6 7 28 27 26 25 24 23 22 LPVDD LPGND LOUT+ LOUT+ NC LHPIN LLINEIN * Small panel LCD TV * LCD Monitors * Portable DVD * Mini speaker * Digital broadcast system VOLUME SE/BTL HP/LINE NC ROUTROUTRPGND 8 9 10 11 12 13 14 21 20 19 18 17 16 15 VDD RLINEIN RHPIN ROUT+ ROUT+ RPGND RPVDD SM7498HL 28PIN Page 1 V.0.2 April 03,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL PIN DESCRIPTIONS No. 1.27 2.3 4 5 6 7 8 9 10 12.13 14,16 15 17.18 19 20 21 22 23 25.26 28 11.24 Pin Name LPGND LOUTMUTE SHUTDOWN BYPASS GND VOLUME SE/BTL HP/LINE ROUTRPGND RPVDD ROUT+ RHPIN RLINEIN VDD LLINEIN LHPIN LOUT+ LPVDD NC I/O O I I I I I I O O I I I I O Left channel power ground Function Left channel negative audio output Places the amplifier in mute mode if a TTL logic low is placed on this terminal 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. Power ground 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. Input MUX control. When logic high, RHPIN and LHPIN inputs are selected. When logic low, RLINEIN and LLINEIN inputs are selected. Right channel negative audio output Right channel power ground Supply voltage terminal for right power stage Right channel positive audio output Right channel input, selected when HP/LINE is held high Right channel input, selected when HP/LINE is held low Supply voltage terminal Left channel input, selected when HP/LINE is held low Left channel input, selected when HP/LINE is held high Left channel positive audio output Supply voltage terminal for left power stage No connection Page 2 V.0.2 April 03,2007 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 -MUTE , SHUTDOWN SE/BTL , HP/LINE MUTE , SHUTDOWN SE/BTL , HP/LINE -Min. 9.0 4.0 0 - 40 Typ. Max. 13.5 VDD 0.8 85 Unit V V V o C Page 3 V.0.2 April 03,2007 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 Mute current Output offset voltage (measured differentially) High-level input current (SE/BTL,SHUTDOWN,HP/LINE,MUTE) Symbol IDD ISD Imute VOO No load Test Conditions Min. Typ. 25 1 2.0 Max. 40 20 Unit mA uA mA SHUTDOWN=0V, SE/BTL=0V Mute = 0V, SE/BTL=0V Gain=20dB, SE/BTL=0V 50 1 mV llH Vl = VDD = PVDD 150 uA Volume Low-level input current (SE/BTL,SHUTDOWN,VOLUME, HP/LINE, MUTE) llL VI= 0V 6 1.1 1 uA V A Bypass voltage (Nominally VDD/2) Short to GND current limit V(BYPASS) Measured at pin 6,No load (1) I Short VIN = 0V, RL = 900m 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.0.2 April 03,2007 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.0.2 April 03,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL APPLICATION INFORMATION 1 2 3 Application circuit using the SM7498HL in an LCD monitor with 16 speaker outputs and volume control D VDD + 10 uf 0.1 uf 4 5 MUTE SHUTDOWN 15 , 21 , 28 SE / BTL HP / LINE 9 10 Right Audio Input 1.0 uf 20 C ROUT + RLINEIN ROUT + ROUT RHPIN ROUT - 17 18 12 13 1.0 uf 19 SM7498HL Left Audio Input 1.0 uf 22 1.0 uf B LOUT + LLINEIN LOUT + LOUT LHPIN LOUT - 25 26 2 3 23 VDD 8 BYPASS VOLUME 6 1 uf 5K 0.1 uf 1 , 7 , 14 , 16 , 27 A Figure 1. Typical Bridge-Tied-Load(BTL) audio amplifier application circuit for an LCD monitor 1 2 3 Page 6 V.0.2 April 03,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL APPLICATION INFORMATION Application circuit using the SM7498HL in an LCD monitor with 8 speaker outputs and volume control 1 2 3 VDD + 10 uf 0.1 uf 4 5 9 MUTE SHUTDOWN SE / BTL 15 , 21 , 28 HP / LINE 10 Right Audio Input 1.0 uf 20 1.0 uf 19 RLINEIN ROUT + ROUT RHPIN ROUT - 18 12 13 SM7498HL Left Audio Input 1.0 uf 22 1.0 uf 23 LHPIN LOUT LLINEIN LOUT + LOUT LOUT + 25 26 2 3 470 uf + VDD 8 BYPASS VOLUME 6 1 uf 5K 0.1 uf 1 , 7 , 14 , 16 , 27 Figure2. Typical Single-Ended (SE) audio amplifier application circuit for an LCD monitor 1 2 3 Page 7 V.0.2 April 03,2007 + ROUT + 17 470 uf SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL FUNCTIONAL BLOCK DIAGRAM RLINEIN ROUT+ Channel-R RHPIN ROUT- VOLUME 32-step Volume control SHUTDOWN MUTE HP/LINE SE/BTL LLINEIN Bypass BYPASS Logic control LOUT+ Channel-L LHPIN LOUT- Page 8 V.0.2 April 03,2007 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 9 V.0.2 April 03,2007 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 10 V.0.2 April 03,2007 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 11 V.0.2 April 03,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL PACKAGE OUTLINE SM7498HL 28 PIN HSOP ( 150mil ) Unit : mm D1 18.54 0.13 0.35 0.051 28 A 2.31 MAX 1 5.15 0.10 16.35 0.051 e 0.80 BASIC E1 7.62 0.13 E 9.82 02.0 0.11+0.09 -0.06 12 SEATING PLANE 0.089 -C2.20 MAX 12 NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (MM) . 2. DIMENSION D1&E1 DOES NOT INCLUDE MOLD PROTRUSION. 3. COPLANARITY OF ALL LEADS SHALL BE (BEFORE TEST) 0.089 MM MAX. FROM THE SEATING PLANE. UNLESS OTHERWISE SPECIFIED. Page 12 V.0.2 April 03,2007 |
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