AN7135AN7135, Serwisówki TV, Układy Scalone
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ICs for Audio Common Use AN7135 Dual 7.5W Low Frequency Power Amplifier Circuit n Overview The AN7135 is a power amplifier circuit of 7.5W (15.0V, Unit : mm 5.9±0.25 7.7±0.3 7.8±0.25 ) output. It can provide stereo operation since two amplifiers are incorporated in a chip. Static circuit current is very smaller than conventional IC for power amplifier, and various protective circuits are incorporated, thus pro- viding high reliability. For its feature of very small static circuit current, it is best suitable for dry cell operating sets (e.g. radio cassette recorder). It requires smaller number of external components because it has little distortion and low noise and can support the stand-by condition. ½ ø 3.6 12 R1.8 n Features • Small static circuit current • Stand-by condition supported • Good oscillation stability • Little unwanted radiation to RF portion of AM/FM • Little distortion • Low noise • Small shock noise at power ON/OFF, stand-by ON/OFF • Fewer external components 1 0.35 + 0.1 – 0.05 Fin-attached 12-lead SIP package (HSIP012-P-0000A) n Block Diagram V CC 3 10 2 Input Circuit Drive Circuit SEPP Output Circuit 12 1 11 Bias Circuit Over Temperature Protection Crossover Distortion 6 8 5 Input Circuit Drive Circuit SEPP Output Circuit 7 4 9 GND (Input) GND (Output) 3 AN7135 ICs for Audio Common Use n Pin Name Pin No. Pin Name Pin No. Pin Name 1 2 3 4 5 6 Negative Feedback Ch.1 Input Ch.1 Ripple filter/Stand-by Controller GND (Input) Input Ch.2 Negative Feedback Ch.2 7 8 9 10 11 12 Output Ch.2 Boot-strap Ch.2 GND (Output) V CC Boot-strap Ch.1 Output Ch.1 n Absolute Maximum Ratings (Ta= 25˚C) Parameter Symbol Rating Unit Supply Voltage Supply Current Power Dissipation Note 1) Operating Ambient Temperature Storage Temperature V CC I CC P D T opr T stg 24 4 62.5 – 30 ~ + 75 – 55 ~ + 150 V A W ˚C ˚C Note) q j–c = 2˚C/W n Recommended Operating Range (Ta= 25˚C) Parameter Symbol Range Operating Supply Voltage Range V CC 5.5V ~ 18.0V Note) 24V at no signals n Electrical Characteristics (V CC = 15V, f IN = 1kHz, R L = 3 ½ , Both channel drive, Ta= 25˚C ± 2˚C) Parameter Symbol Condition min. typ. max. Unit Quiescent Current Output End Noise Voltage Note 1) Voltage Gain Total Harmonics Distortion Max. Output Power Channel Balance I CQ V NO G V THD P O CB V IN = 0mV V IN = 0mV, R g = 10k½ V IN = 3mV V IN = 3mV THD= 10% V IN = 3mV 42.5 14 0.25 44.5 0.40 7.5 0 20 0.50 46.5 0.75 mA mV dB % W dB 7.0 –1 + 1 Ripple Rejection Ratio Note 1) RR V CC (ripple) = 280mV, f (ripple) = 120Hz R g = 0½ Sine wave 45 50 dB Input Offset Voltage Stand-by Current V IN (O.S) I STB Input pin open Pin3 open 10 30 30 mV µ A Note 1) Measured through 15Hz to 30kHz (12dB/OCT) filter ICs for Audio Common Use AN7135 Application Circuit V CC (15V) R.F & STB + V CC 1000µF 3 10 390 ½ V STB BS1 11 IN1 + 2 + 47 µ F 1000 µ F 100µ F 30k + 10k½ 12 + V O 1 ½ OUT1 1 – NF1 0.1µF 150½ + 30k ½ 3½ (20W) 100 µ F 2.2½ BS2 8 + 5 + 47µF 1000µF IN2 + 7 V O 2 OUT2 6 – 0.1 µ F NF2 150½ 30k ½ 2.2½ ½ (20W) 100 µ F 4 9 P D – Ta (Standard Conditions) V CC = 15V R L = 3½ f IN = 1kHz V IN = 10mV or 3mV R g = 600½ V STB = 5.0V Both Ch. Drive With heat sink Tr for stand-by SW NPN··· 2SC828A PNP··· 2SA564A 80 P D at Ta = 25˚C (a) 62.50W (q j–c = 2.0˚C/W) Infinity heat sink (b) 20.83W (q f = 4.0˚C/W) Heat sink area : 100cm 2 70 ´ 3mmAl (Black lacquer coated) 200cm 2 (62.50) (a) ´ 2mmAl (Lacquered) (c) 15.63W (q f = 6.0˚C/W) Heat sink area : 100cm 2 60 ´ 2mmAl (Not lacquered) (d) 3.0W at Ta = 30˚C (q j–a = 40˚C/W) Without heat sink 50 40 30 (20.83) (b) (c) (15.63) 10 (3.0) (d) 0 0 20 40 60 80 100 120 140 160 (30) Ambient Temperature Ta (˚C) n 3 20 AN7135 ICs for Audio Common Use I CQ – V CC P O – V CC G V , THD – f IN 20 20 f req. = 1kHz THD = 10% 52 V CC = 15V R L = 3½ V IN = 10mVrms Both ch. drive 50 48 16 16 46 G ain 1.0 No R RF 12 12 44 0.8 R L = 3½ 42 0.6 V STB = 6V T HD 8 8 R L = 4 ½ 40 38 0.4 V STB = 5V Ch. 1 0.2 0 4 4 36 Ch. 2 V STB = 4V V STB = 3V R L = 8½ 34 0 0 12 32 0 4 8 12 16 20 0 4 8 16 20 10 100 1k 10k 100k Supply Voltage V CC (V) Supply Voltage V CC (V) Input Frequency f IN (Hz) P O , THD – V IN G V , THD – V CC V no – R g 100 100 10 1.0 V CC = 15V R L = 3½ Both ch. drive 1kHz 10kHz 100Hz V IN = 3V f IN = 1kHz R L = 3 V CC = 15V DIN/Audio With filter 30 30 47 46 V C = 5V ½ Both ch. drive 9 8 0.8 10 10 Gv 45 7 3 3 44 6 0.6 1 1 43 5 0.3 0.3 42 41 4 3 0.4 0.1 0.1 40 2 0.2 0.03 0.03 TH D 1 V C = 5V 0.01 0.01 0 0 0 0.1 0.3 1 3 10 30 100 0 4 8 12 16 20 10 100 1k 10k 100k Input Voltage V IN (mV) Supply Voltage V CC (V) Resistance R g ( ½ ) RR – f ripple RR – V ripple RR – V CC 100 100 80 V CC = 15V V R = 280mVrms R g = 0 DIN/Audio With filter V CC = 15V f R = 120Hz R g = 0 DIN/Audio With filter V R = 280mVrms f R = 120Hz R g = 0 DIN/Audio With filter 70 80 80 60 60 60 50 40 40 40 30 C R– F = 100µF (same for 47µF) 20 20 20 10 0 10 20 30 100 200 300 500 1k 0 0.1 0.2 0.3 0.5 1 3 5 10 0 0 4 8 12 16 20 24 28 32 Ripple Frequency f ripple (Hz) Ripple Voltage V ripple (V) Supply Voltage V CC (V) [ Pobierz całość w formacie PDF ] |
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