Ordering number:ENN6743 Monolithic Linear IC LA2655V Clear Sound Control IC Loading "Plus Sound" Algorithm Overview Package Dimensions The LA2655V is an IC for the sound replay which can be used for the audio equipment such as the radio cassette recorder, the personal computer, the stereo, and the television. This IC has the function to replay a clear sound. unit:mm 3179B-SSOP20 [LA2655V] 20 11 6.4 0.5 1 10 0.65 1.5max (0.33) 6.5 0.22 Functions 0.15 0.1 (1.3) Provides improved audio quality from one-way speaker systems by incorporating the SANYO algorithm “Plus Sound”, which corrects delay and attenuation differences between high and low frequencies due to the characteristics of the speaker. 4.4 Features • “Plus Sound” algorithm provided on chip. • Clear sound signal processing. • Variable effect level (with external parts). • Effect ON/OFF switch. SANYO : SSOP20 Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Symbol Maximum supply voltage Conditions Ratings Unit VCC max Allowable power dissipation Pd max Ta≤70˚C 13 V 150 mW Operating temperature Topr –25 to +70 ˚C Storage temperature Tstg –40 to +125 ˚C Operating Conditions at Ta = 25˚C Parameter Recommended supply voltage Operating supply voltage range Input high-level voltage Input low-level voltage Symbol Conditions Ratings Unit VCC VCC op 9.0 V 4.5 to 12.0 V VIH VIL 2.5 to VCC 0 to 1.5 V V Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other parameters) listed in products specifications of any and all SANYO products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 73101TN (KT) No.6743–1/4 LA2655V Electrical Characteristics at Ta = 25˚C, VCC=9V, fm=1kHz, Vin=300mVrms=0dB, RL=10kΩ Parameter Symbol Quiescent currant Output level deviation Maximum output voltage Total harmonic distortion Output noise voltage Ratings Conditions min typ max Unit IccT No signal, bypass 5 10 mA VG T Bypass –2 0 +2 dB VG C ON –1 +1 +3 Vo max T Bypass 1.5 2 Vo max C ON 1.5 THD T Bypass THD C dB Vrms 2 Vrms 0.005 0.03 ON 0.08 0.5 % Vno T Bypass –95 dBm Vno C ON –85 dBm % Block Diagram Lch-IN Lch-OUT C7 C11 47µF + 20 Vcc 19 AGND 18 R3 2200p + 4.7 µF N.C C12 C10 1µF C9 C8 L- IN 17 R4 2200p F + 1µF 82000pF LC1 LV1 16 C13 + Vcc 15 LC2 14 LC3 LV2 13 12 L-OUT 11 A SW L-ch control box B ON/OFF control A R-ch control box BSW CONT1 GND 4 5 VREF R-IN C1 C2 4.7 µF C3 1µF 6 RC1 RV1 R1 8 RC2 C5 9 RC3 10 RV2 C6 2200pF C4 L/H 7 R-OU T 1µF + 3 + 2 + 1 82000pF R2 2200pF Rch-IN Rch-OUT P1 Mode High level R1, R3 L H I/O through effect Max Mid – 18kΩ Min 11kΩ Low level Max R2, R4 10kΩ Mid Min 24kΩ – Remarks Remarks No.6743–2/4 LA2655V Pin Function Pin No. Pin Name Pin Voltage Description Equivalent circuit The function switching switch. 1 1 CONT1 0/5V The linear system input terminal. 4 17 R-IN L-IN 4 17 1/2VCC The terminal which connects the capacitor which sets a phase shift position with the high frequency. 5 16 RC1 LC1 1/2VCC 5 16 It connects resistance and a capacitor to amplify the high frequency. 6 15 RV1 LV1 1/2VCC 6 15 The terminal which connects the capacitor which sets a phase shift position with the low frequency. 7 14 RC2 LC2 1/2VCC 7 14 The terminal which connects the capacitor which sets a phase shift position with the low frequency. 8 13 RC3 LC3 1/2VCC 8 13 It connects resistance and a capacitor to amplify the low frequency. 9 12 RV2 LV2 1/2VCC 9 12 The linear system output terminal. 10 11 R-OUT L-OUT 1/2VCC 10 11 No.6743–3/4 LA2655V Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products(including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be expor ted without obtaining the expor t license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of July, 2001. Specifications and information herein are subject to change without notice. PS No.6743–4/4