Ordering number : ENN6350 Monolithic Linear IC LA6557H Five-Channel Bridge Driver for MD and CD Players Overview Package Dimensions The LA6557H is a five-channel bridge driver developed for use in CD and MD players. It provides four BTL power amplifier channels and one H-bridge power amplifier channel. unit: mm • Four BTL power amplifier channels and one H-bridge power amplifier channel • IOmax: 700 mA (each channel) • Built-in level shifter circuits (BTL amplifiers) • One muting circuit (output on/off control) system that operates for the BTL amplifiers • Thermal shutdown circuit built in 15 4.9 7.9 28 10.5 Features and Functions [LA6557H] 15.3 6.2 2.7 0.65 3234-HSOP28H-C 1 14 0.25 1.3 0.8 0.3 0.1 2.5max 2.25 0.85 Specifications SANYO: HSOP28H-C (375mil) Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings VCC max Supply voltage Maximum output current IOmax Maximum input voltage VINBmax Mute pin voltage 14 For each channel in channels 1 to 5 VMUTE Allowable power dissipation Pd max Independent IC Mounted on the specified printed circuit board* Unit V 0.7 A 13 V 13 V 0.82 W 2.0 W Operating temperature Topr –30 to +85 °C Storage temperature Tstg –55 to +150 °C Ratings Unit Note: * Specified printed circuit board: 76.1 × 114.3 × 1.6 mm3 glass-epoxy PCB Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Symbol Conditions 5.6 to 13 VCC 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 51900RM (OT) No. 6350-1/8 LA6557H Pd max — Ta Allowable power dissipation, Pdmax — W 3.0 2.5 Mounted on the specified printed circuit board (76.1 × 114.3 × 1.6 mm3 glass-epoxy board) 2.0 1.5 1.0 0.82 1.04 Independent IC 0.5 0.43 0 –30 –40 –20 0 20 40 60 80 100 Ambient temperature, Ta — °C Electrical Characteristics at Ta = 25°C, VCC1 = VCC2 = 8 V, VREF = 1.65 V Parameter Symbol Conditions Ratings min typ Unit max No-load current drain: on ICC-ON All outputs on*1, FWD = REV = 0 V 30 50 mA No-load current drain: off ICC-OFF All outputs off*1, FWD = REV = 0 V 10 20 mA VREF input voltage range VREF-IN 1 VCC–1 V –50 +50 mV VCC V [BTL Amplifier Block] Output offset voltage Input voltage range VOFF The voltage difference between outputs for the BTL amplifiers VIN The input voltage range 0 Output voltage VO The voltage between VO+ and VO– for each channel when RL = 8 Ω.*2 4 Closed-circuit voltage gain VG SR Slew rate 5 V Gain from input to output 12 dB For independent amplifiers. Twice when measured between outputs *4 0.5 V/µs For each MUTE *3 Mute on voltage VMUTE-ON Mute off voltage VMUTE-OFF For each MUTE *3 0.5 2 V V [H Bridge Block] Output voltage VO-LOAD Low-level input voltage VIN-L High-level input voltage VIN-H The voltage between VO+ and VO– for each channel when RL = 8 Ω.*2 6 V 1 2 V V [Regulator Block] Output voltage Vreg IL = 100 mA 4.75 5 5.25 Output load regulation ∆VRL IL = 0 to 200 mA –50 0 10 mV VCC = 6 to 12 V, IL = 100 mA –15 21 60 mV Supply voltage regulation Notes:1. 2. 3. 4. ∆VVCC V The total current drain for VCC1 and VCC2 with no load. The voltage across an 8 Ω load. With the output saturated. MUTE: When the MUTE pin is high, the outputs will be on, and when low, off (high impedance) These values are design guarantee values, and are not tested. No. 6350-2/8 1 2 3 4 5 6 7 VCC2 VO5– VO5+ VO4+ VO4– VO3+ VO3– REV FWD S-GND MUTE VIN4 VIN4G VCC-S 28 27 26 25 24 23 22 REG-IN VIN3G VIN3 VIN2G VIN2 20 19 18 17 16 15 8 9 10 11 12 13 14 VO1+ VO1– VCC1 VIN1 VIN1G REG-OUT FR 21 VO2– LA6557H VREF-IN FR VO2+ LA6557H Pin Assignment Top view No. 6350-3/8 LA6557H Pin Description Pin No. Pin Function 1 VCC2 Channel 3, 4, and 5 power supply (shorted to VCC1 and VCC-S) 2 VO5– Loading output (–) 3 VO5+ Loading output (+) Equivalent circuit 2 3 VO5+ VO5- 4 VO4+ Channel 4 output (+) 5 VO4– Channel 4 output (–) 6 VO3+ Channel 3 output (+) 7 VO3– Channel 3 output (–) 8 VO2+ Channel 2 output (+) 9 VO2– Channel 2 output (–) 10 VO1+ Channel 1 output (+) 11 VO1– Channel 1 output (–) HM0001 OUT 4,5,6,7, 8,9,10,11 HM0002 Channel 1 and 2 (BTL) power supply (shorted to VCC-S and VCC2) 12 VCC1 13 VIN1 Channel 1 input 15 VIN2 Channel 2 input 17 VIN3 Channel 3 input 24 VIN4 Channel 4 input 14 VIN1G Channel 1 input (gain adjustment) 16 VIN2G Channel 2 input (gain adjustment) 18 VIN3G Channel 3 input (gain adjustment) 23 VIN4G Channel 4 input (gain adjustment) VIN 13 (15,17,24) VING 14 (16,18,23) Vref 21 HM0003 Notes: The center frame (FR) functions as the power system ground. It must be, along with S-GND, at the lowest potential in the system. The power supply pins, VCC-S, VCC1, and VCC2 must be shorted together externally to the IC. Continued on next page. No. 6350-4/8 LA6557H Continued from preceding page. Pin No. Pin 19 REG-IN 20 REG-OUT 21 VREF-IN 22 VCC-S Function Equivalent circuit Regulator input (base of the external pnp transistor) Regulator output (collector of the external pnp transistor) Reference voltage input Signal system power supply (shorted to VCC1 and VCC2) VCC 1 (12) MUTE 25 25 MUTE Output on/off control for channels 1 to 4 (the BTL amplifiers) 100 kΩ 100 kΩ S-GND 26 HM0004 26 S-GND Signal system ground 27 FWD Channel 5 (VLO) output switching (FWD), logic input to the loading block 28 REV Channel 5 (VLO) output switching (REV), logic input to the loading block 27 FWD HM0005 Notes: The center frame (FR) functions as the power system ground. It must be, along with S-GND, at the lowest potential in the system. The power supply pins, VCC-S, VCC1, and VCC2 must be shorted together externally to the IC. No. 6350-5/8 LA6557H Block Diagram VO5– 2 Thermal shutdown circuit Power supply for channels 3, 4, and 5 VO5+ 3 VO4+ 4 Level shifter CH5 CH4 VO4– 5 28 REV 27 FWD 26 S-GND 25 MUTE 24 VIN4 23 VIN4G 22 VCC-S Input 1 Output control VCC2 The MUTE pin functions as follows: High: output on Low: output off Mute 22 kΩ 11 kΩ VO3+ Level shifter – + 6 CH3 7 FR VO2+ FR 8 9 VO1+ 10 Level shifter CH2 VO2– CH1 VO1– 11 VCC1 12 VIN1 13 VIN1G 14 Signal system power supply – + Level shifter VO3– – + 5 VREG (with an external PNP transistor) VREF-IN 20 REG-OUT 19 REG-IN 18 VIN3G 17 VIN3 16 VIN2G 15 VIN2 + – 22 kΩ – + 11 kΩ Power supply for channels 1 and 2 22 kΩ 11 kΩ – + 21 22 kΩ – + 11 kΩ No. 6350-6/8 LA6557H Sample Application Circuit Loading motor 1 VCC2 REV 28 REV 2 VO5– FWD 27 FWD M 3 VO5+ S-GND 26 4 VO4+ MUTE 25 5 VO4– VIN4 24 6 VO3+ VIN4G 23 VCC-S 22 MUTE Tracking coil Focus coil 7 VO3– F R Spindle motor Sled motor F R LA6557H VREF-IN 21 8 VO2+ 9 VO2– REG-OUT 20 10 VO1+ REG-IN 19 11 VO1– VIN3G 18 12 VCC1 VIN3 17 M M VCC TRACKING VREF-IN 13 VIN1 14 VIN1G VIN2G 16 VIN2 15 FOCUS SPINDLE SLED No. 6350-7/8 LA6557H System Diagram (Relationship between MUTE and the power supplies (VCC*)) CH1 VCC1 CH2 MUTE CH3 CH4 VCC2 H bridge Note: * VCC1 and VCC2 must be connected externally. H Bridge Block FWD REV VO5+ VO5– Mode L L OFF OFF Open *1 L H H L Forward H L L H Reverse H H L L Brake *2 Notes: 1. The outputs are in the high-impedance state in this mode. 2. During braking, the sink side transistor will be turned on (short braking). VLO+ and VLO– will be close to the ground level. 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 exported without obtaining the export 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 May, 2000. Specifications and information herein are subject to change without notice. PS No. 6350-8/8