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 SM7498HL 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 * LCD Monitors * Portable DVD * Mini speaker * Digital broadcast system PIN ASSIGNMENTS (TOP VIEW) LPGND LOUTLOUTMUTE SHUTDOWN BYPASS GND VOLUME SE/BTL HP/LINE NC ROUTROUTRPGND 1 2 3 4 5 6 7 28 27 26 25 24 23 22 LPVDD LPGND LOUT+ LOUT+ NC LHPIN LLINEIN 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. Pin Name I/O 1.27 LPGND - Left channel power ground 2.3 LOUT- O Left channel negative audio output 4 MUTE I 5 SHUTDOWN I 6 BYPASS I 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. 7 GND - Power ground 8 VOLUME I Terminal for dc volume control. DC voltage range is 0V to 5V 9 SE/BTL I 10 HP/LINE I 12.13 ROUT- O Right channel negative audio output 14,16 RPGND - Right channel power ground 15 RPVDD - Supply voltage terminal for right power stage 17.18 ROUT+ O Right channel positive audio output 19 RHPIN I Right channel input, selected when HP/LINE is held high 20 RLINEIN I Right channel input, selected when HP/LINE is held low 21 VDD - Supply voltage terminal 22 LLINEIN I Left channel input, selected when HP/LINE is held low 23 LHPIN I Left channel input, selected when HP/LINE is held high 25.26 LOUT+ O Left channel positive audio output 28 LPVDD - Supply voltage terminal for left power stage 11.24 NC Function 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. 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 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 Operating free-air temperature Max. Unit 9.0 13.5 V MUTE , SHUTDOWN SE/BTL , HP/LINE 4.0 VDD V VIL MUTE , SHUTDOWN SE/BTL , HP/LINE 0 0.8 V TA -- - 40 85 Page 3 Typ. o C 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 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 Mute current Imute Mute = 0V, SE/BTL=0V VOO Gain=20dB, SE/BTL=0V llH Vl = VDD = PVDD Output offset voltage (measured differentially) mA 2.0 50 High-level input current mV 1 (SE/BTL,SHUTDOWN,HP/LINE,MUTE) uA Volume 150 Low-level input current (SE/BTL,SHUTDOWN,VOLUME, HP/LINE, MUTE) Bypass voltage (Nominally VDD/2) llL VI= 0V 1 V(BYPASS) Measured at pin 6,No load (1) Short to GND current limit I Short VIN = 0V, RL = 900mΩ uA 6 V 1.1 A 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.0.2 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) 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.0.2 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 16Ω speaker outputs and volume control D VDD + 10 uf 15 , 21 , 28 0.1 uf 4 MUTE 5 SHUTDOWN SE / BTL 9 HP / LINE 10 ROUT + 17 ROUT + 18 ROUT - 12 ROUT - 13 LOUT + 25 LOUT + 26 LOUT - 2 LOUT - 3 BYPASS 6 Right Audio Input 1.0 uf 20 RLINEIN C 1.0 uf 19 RHPIN SM7498HL Left Audio Input 1.0 uf 22 LLINEIN 1.0 uf 23 B 8 VDD LHPIN VOLUME 1 uf 5K 1 , 7 , 14 , 16 , 27 0.1 uf A Figure 1. Typical Bridge-Tied-Load(BTL) audio amplifier application circuit for an LCD monitor 1 2 Page 6 3 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 8Ω speaker outputs and volume control VDD 10 uf 15 , 21 , 28 0.1 uf 4 MUTE 5 SHUTDOWN 9 Right Audio Input HP / LINE 10 ROUT + 17 ROUT + 18 ROUT - 12 ROUT - 13 LOUT + 25 LOUT + 26 LOUT - 2 LOUT - 3 BYPASS 6 SE / BTL 1.0 uf 20 RLINEIN 1.0 uf 19 RHPIN 470 uf + + SM7498HL Left Audio Input 22 LLINEIN 1.0 uf 23 8 VDD LHPIN 470 uf + 1.0 uf VOLUME 1 uf 5K 1 , 7 , 14 , 16 , 27 0.1 uf Figure2. Typical Single-Ended (SE) audio amplifier application circuit for an LCD monitor 1 2 3 Page 7 V.0.2 April 03,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL FUNCTIONAL BLOCK DIAGRAM RLINEIN ROUT+ Channel-R RHPIN VOLUME ROUT- 32-step Volume control Bypass SHUTDOWN MUTE HP/LINE BYPASS Logic control SE/BTL LLINEIN 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 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 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 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 10 V.0.2 April 03,2007 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 11 V.0.2 April 03,2007 SAMHOP Microelectronics Corp. 3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL PACKAGE OUTLINE Unit : mm SM7498HL 28 PIN HSOP ( 150mil ) D1 18.54 ± 0.13 0.35 ± 0.051 A 1 5.15 ± 0.10 2.31 MAX E 9.82 ± 02.0 E1 7.62 ± 0.13 28 e 0.80 BASIC 16.35 ± 0.051 12° SEATING PLANE 0.089 -C- 2.20 MAX 0.11+0.09 -0.06 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