AN5276AN5276, Serwisówki TV, Układy Scalone
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ICs for Audio Common Use ) power amplifier with variable audio output and volume control 2-ch (19V, 8 W Unit : mm Overview The AN5276 is a monolithic integrated circuit designed for 5.0 W (19 V, 8 W) output audio power amplifier. It is a dual channel SEPP IC suitable for stereo operation in TV application. 7.7 0.3 3.6 Features · Few external components : • No Boucherot cells(output C, R) • No Bootstrap Capacitors • No Negative Feeback Capacitors · Built-in muting circuit · Built-in stand-by circuit · Built-in various protection circuits (Load-short, thermal, over-voltage and current) · High ripple rejection(55 dB) · Compatible with AN5275, AN5277 · Operating voltage range 10 V to 24 V(19 V typ.) R1.8 (12.5) (1.2) 19.1 ± 0.3 21.9 ± 0.3 HSIP012-P-0000A Applications · TV n Block Diagram Att. Att. Con Protection circuit • Temperature • Over-voltage • Over-current • Load short Ripple filter 1 AN5276 5 W ´ n ± f n n AN5276 ICs for Audio Common Use n Pin Descriptions Pin No. Descriptions Pin No. Descriptions 1 N.C. 7 Ch.2 output 2 Ch.1 input 8 Mute 3 Ripple filter 9 Output GND 4 Input GND 10 V CC 5 Ch.2 input 11 Standby 6 N.C 12 Ch.1 output n Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage V CC 26.0 V Supply current I CC 4.0 A Power dissipation * 2 P D 37.5 W Operating ambient temperature * 1 T opr -25 to +75 °C Storage temperature * 1 T stg - 55 to + 150 ° C Note) * 1 : Except these items, all other measurements are taken at T a = 25 °C. * 2 :T a = 75 °C. n Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC 10.0 to 24.0 V 2 ICs for Audio Common Use AN5276 n Electrical Characteristics at V CC = 19 V, f = 1 kHz, R L = 8 W , T a = 25 ° C Parameter Symbol Conditions Min Typ Max Unit Quiescent current I CQ V IN = 0 mV ¾ 35 70 mA Output end noise voltage * 1 V NO No input, R g = 10 kW ¾ 0.22 0.4 mV Voltage gain G V V IN = 57 mV 32 34 36 dB Total harmonic distortion THD V IN = 57 mV ¾ 0.2 0.4 % Maximum Output Power P O V CC = 22 V, THD = 10 % 5.6 7.0 ¾ W Maximum Output power P O V CC = 19 V, THD = 10 % 4.0 5.0 ¾ W Ripple rejection ratio * 1 RR V r = 1 V rms 45 55 ¾ dB f r = 120 Hz, R g = 10 kW Channel balance CB V IN = 57 mV -1.0 0 1.0 dB Muting Ratio MR V IN = 57 mV 70 80 ¾ dB Muting control voltage V MUTE V IN = 57 mV, MR ³ 70 dB 3.0 ¾¾ V Standby control voltage 'on' V STD-ON No input, I CC £ 0.1 mA ¾¾5.0 V Standby control voltage 'off' V STD-OFF No input, I CC ³ 17 mA 8.5 ¾¾ V Channel crosstalk CT V IN = 57 mV, R g = 10 kW 50 60 ¾ dB Note) * 1 : For this measurement, use the 20 Hz to 20 kHz (12 dB/OCT) filter. 3 AN5276 ICs for Audio Common Use n Terminal Equivalent Circuits Pin No. Equivalent circuit Description DC voltage (V) 1 ¾ Not connected ¾ 2 Ch.1 input 0 200 W 400 W This is the amplifier input pin. 2 30 kW 4 3 Ripple filter V CC -1.5V BE 10 This is the pin to connect the positive terminal of a ripple filter capactior. 30 kW 3 20 kW 4 4 ¾ Input GND 0 Input ground pin 5 Ch.2 input ¾ 200 W 400 W This is the amplifier input pin. 5 30 kW 4 6 ¾ Not connected ¾ 4 ICs for Audio Common Use AN5276 n Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit Description DC voltage (V) 7 Ch.2 output V CC /2 10 Ch.2 output pin Pre amp. Driver Cct 7 6 0 0 W 9 V CC/2 30 kW 8 Mute ¾ 10 Mute input pin. Mute 'on' = 5 V Mute 'off' = 0 V 3 kW 3 kW 10 k W 8 200 W 4 9 ¾ Output GND 0 Ch.1 & Ch.2 output ground. 10 ¾ V CC 19 V(typ.) This is the power supply pin. 5 [ Pobierz całość w formacie PDF ] |
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