AN7531SAAN7531SA, Serwisówki TV, Układy Scalone
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ICs for Audio Common Use AN7531SA Headphone amplifier IC for portable equipment Overview AN7531SA is an audio signal processing IC in which bass boost amplifiers, ALC circuit and beep circuit are built in the headphone amplifiers for use in portable equip- ment. Its headphone output block is using the center amplifier method which eliminates the need for coupling capacitor so that the circuit is most suitable for rational- ization of audio circuit. Unit: mm 6.5 ± 0.3 24 13 0 ° to 10 ° (0.50) 1 12 Features • Output coupling capacitor is not required (Center am- plifier method) • Built-in bass boost amplifiers • ALC circuit • Built-in mute circuit • Built-in beep circuit • With mixed output pin of power amplifier (0.50) 0.50 0.2 ± 0.1 Seating plane Seating plane SSOP024-P-0300A Applications • Portable CD and MD players, etc. Block Diagram BST SW Bias Standby SW Mute SW Beep AT T SW C-amp. SW ALC det. 1 AN7531SA ICs for Audio Common Use Pin Descriptions Pin No. Description Pin No. Description 1 Bass boost amplifier NF 13 Attenuation SW 2 ch.1 and ch.2-mixed output pin 14 ch.1 input pin 3 Ripple filter 15 ch.2 input pin 4 Center amplifier output control SW 16 GND (input) 5 Supply pin 17 Beep sound input pin 6 ch.2 output pin 18 Mute time-constant pin 7 Center amplifier output pin 19 Mute control pin 8 ch.1 output pin 20 Standby control pin 9 GND (output) 21 Bias output pin 10 Mixed output pin of power amplifier 22 Bias input pin 11 ALC input pin 23 Bass boost control pin 12 ALC detection pin 24 Bass boost amplifier output pin Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage * 2 V CC 4.6 V Supply current I CC 200 mA Power dissipation * 3 P D 370 mW Operating ambient temperature * 1 T opr −25 to +75 °C Storage temperature * 1 T stg − 55 to + 125 ° C Note) * 1: Except for the operating ambient temperature and storage temperature, all ratings are for T a = 25 ° C. * 2: Without signal. * 3: T a = 75 ° C, mounted on standard board (Refer to the Application Notes). Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC 1.8 to 4.5 V 2 ICs for Audio Common Use AN7531SA Electrical Characteristics at T a = 25 ° C Parameter Symbol Conditions Min Typ Max Unit Standby current I STB V IN = 0 mV, STB: On 0.1 5 µA Quiescent current 1 I CQ1 V IN = 0 mV, C-CUP: On 1.5 3.0 mA Quiescent current 2 I CQ2 V IN = 0 mV, C-CUP: Off 2.0 4.0 mA Voltage gain 1 G V1 V OUT = −22 dBV, ATT: On 5.5 8.3 10.5 dB Voltage gain 2 G V2 V OUT = −22 dBV, ATT: Off 14 15.9 18 dB Channel balance CB V OUT = − 22 dBV − 1.0 0 1.0 dB Maximum output power P O THD = 10%, V CC = 2 V 5.0 9.0 mW Total harmonic distortion THD V OUT = −12.2 dBV 0.1 0.5 % Output noise voltage V NO R g = 600 Ω − 94.5 − 88 dBV Channel cross-talk CT V OUT = −12.2 dBV 30 50 dB Ripple rejection RR V CC = 1.8 V, f r = 100 Hz, V r = −20 dBV 64 72 dB Mute attenuation MT V OUT = − 12.2 dBV 68 78 dB Beep sound output voltage V BEEP V BEEP-IN = 0 dBV −56 −51 −46 dBV Boosting amount B ST V OUT = −30 dBV, f = 100 Hz 9.7 11.7 13.7 dB ALC detection level V ALC V IN = − 20 dBV − 41.5 − 39.5 − 37.5 dBV Note) Condition: V CC = 2.4 V, R L = 16 Ω, f = 1 kHz, R g = 10 kΩ, STB: On, Mute: Off, C-CUP: Off, ATT: Off, ALC: Off, BST: Off * 1: Measurement using A curve filter * 2: Measurement using 30 kHz LPF Application Notes 1. P D T a curves of SSOP024-P-0300A P D T a 900 800 Mounted on standard board (glass epoxy: 50 mm 740 × 50 mm × t0.08 mm) 700 R th(j-a) = 135.1 ° C/W 600 500 400 300 Independent IC without a heat sink R th(j-a) 200 = 256.4 ° C/W 100 0 0 25 50 75 100 125 Ambient temperature T a (°C) 3 390 AN7531SA ICs for Audio Common Use Application Notes (continued) 2. Main characteristics I CC V CC (STB: 0 V, Mute: On) I CC V CC 4.0 V IN = 0 mV ALC = Off 4.5 R L = 16 Ω BST = Off I CC6 (BTL) 3.5 Ω STB = 0 V/V CC Mute = 0 V/V CC = 10 k On/off CCUP = Off/on = 4 3.5 3.0 I CC (SEPP) BST = On 3 2.5 I CC4 (BTL) Mute = On 2.5 I CC5 (SEPP) 2.0 I CC3 (C-CUP) Mute = On 2 1.5 1.5 V IN = 0 mV R L = 16 Ω R g = 10 kΩ STB = V CC Mute = 0 V ALC = Off BST = On/off ATT = On/off CCUP = Off 1.0 1 I CC (BTL) BST = On 0.5 0.5 I CC1 (C-CUP) STB = 0 V, I CC2 (BTL) STB = 0 V 0.0 1.0 1.5 3.0 Power supply voltage V CC (V) 2.0 2.5 3.5 4.0 4.5 5.0 0.0 1.0 1.5 3.0 Power supply voltage V CC (V) 2.0 2.5 3.5 4.0 4.5 5.0 I CC V CC (ALC: On, ATT: On) I CC7, 8 V CC 4.0 15 3.5 I CC (BTL) ALC = On 14 V IN = 0 mV R L = 16 Ω R g = 10 kΩ STB ALC = On/off BST = Off ATT = On/off CCUP I CC (BTL) ATT = On 13 3.0 I CC8 (BTL) = V CC = Off/on 12 Mute = 0 V 2.5 11 V OUT = 0.5 mV ALC = Off 1 kHz R L = BST = Off 2.0 10 = 16 Ω On/off CCUP = R g = 10 k Ω = Off 9 1.5 STB = V CC I CC (C-CUP) ALC = On Mute = 0 V 8 1.0 I CC (C-CUP) ATT = On 7 I CC7 (SEPP) 0.5 6 0.0 1.0 1.5 3.0 Power supply voltage V CC (V) 2.0 2.5 3.5 4.0 4.5 5.0 5 1.0 1.5 3.0 Power supply voltage V CC (V) 2.0 2.5 3.5 4.0 4.5 5.0 I CC P O I CQ V STB 100 3.0 V CC = 2.4 V f = 1 kHz R L = 16 Ω Both ch. input R g = 10 kΩ STB = V CC Mute = 0 V ALC = Off BST = Off ATT = Off CCUP = Off V CC = 2.4 V ALC = Off 0 mV R L = 16 Ω R g = 10 kΩ Mute = Off ATT = Off CCUP = Off = 2.5 = 0 V 2.0 I CC (BTL) 10 1.5 I CC (C-CUP) 1.0 0.5 1 0.0 0.01 0.10 1.00 10.00 0.0 0.5 1.0 1.5 2.0 2.5 Output power P O (mW) Standby voltage V STB (V) 4 R g ATT f ATT V IN BST ICs for Audio Common Use AN7531SA Application Notes (continued) 2. Main characteristics (continued) P O V CC THD P O 110 f = 1 kHz THD = 10% R L = 16 Ω Both ch. input R g = 10 kΩ STB = V CC Mute = 0 V ALC = Off BST = Off ATT = Off CCUP = Off 100 V CC = 2.4 V f = 1 kHz R L = 16 Ω Both ch. input R g = 10 kΩ A-curve filter STB = V CC Mute = 0 V ALC = Off BST = Off ATT = Off CCUP = Off 100 90 80 10 70 60 1 10 kHz ch.1, ch.2 50 40 1 kHz ch.1, ch.2 Ch.1, Ch.2 30 0.1 20 100 Hz ch.1, ch.2 10 0 0.01 1.0 1.5 3.0 Power supply voltage V CC (V) 2.5 3.5 4.0 4.5 5.0 0.10 1.00 10.00 100.00 Output power P O (mW) P O , THD V IN (ALC: On) G V frequency 0 10 −10 V CC = 2.4 V V CC = 2.4 V f = 1 kHz R L = 16 Ω Both ch. input R g = 10 kΩ STB = V CC Mute = 0 V ALC = Off/on BST = Off ATT = Off CCUP = Off V IN = − 46 dBV −5 Ω Both ch. input R g = 16 − 15 −10 8 V O (ALC : Off) = 10 k Ω STB = V CC −15 − 20 Mute = 0 V G V (BST : On) ALC = Off − 20 6 BST = On/off − 25 THD (ALC : Off) −25 Off CCUP = = Off − 30 4 − 30 −35 V O (ALC : On) G V (BST : Off) −40 2 −35 THD (ALC : On) −45 −50 − 70 − 60 − 50 − 40 − 30 − 20 − 10 0 0 −40 10 100 1k 10k 100k Input voltage V IN (dBV) Frequency f (Hz) Beep V IN G V V CC 0 20 V CC = 2.4 V V IN = 0 mV R L = 16 Ω R g = 10 kΩ STB = V CC Mute − 10 0 V/V CC ALC = Off BST = 18 G V1 (ch.1 ATT : Off), G V1 (ch.2 ATT : Off) − 20 Off ATT = Off CCUP = 16 = Off 14 −30 −40 V BEEP (ch.2 Mute : Off) 12 −50 10 G V2 (ch.1 ATT : On), G V2 (ch.2 ATT : On) − 60 8 V OUT = − 20 dB V CC Mute = 0 V ALC = − 70 6 f = 1 kHz Off BST = Off ATT = Ω Both ch. input R g = 16 − 80 4 On/off CCUP = Off = V BEEP (ch.1 Mute : Off) = 10 k Ω −90 2 − 100 0 0 20 0 40 0 60 0 80 0 1 00 0 1 20 0 1 40 0 1 600 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Beep input voltage V BEEP-IN (mV[p-p]) Power supply voltage V CC (V) 5 2.0 R L ATT STB R L [ Pobierz całość w formacie PDF ] |
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