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LB11872H Folha de dados(PDF) 11 Page - Sanyo Semicon Device |
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LB11872H Folha de dados(HTML) 11 Page - Sanyo Semicon Device |
11 / 11 page LB11872H PS No.7257-11/11 13. FRAME Pin and Heat sink Area The FRAME pin and the heat sink area function as the control circuit ground terminal. It is desirable that this ground line and the Rf resistor ground line be grounded at a single point at the ground for the electrolytic capacitor. Thermal dissipation can be improved significantly by tightly bonding the metallic surface of the back of the IC package to the PCB with, for example, a solder with good thermal conductivity. 14. CSD Pin The capacitor connected to the CSD pin influences several operational aspects of this IC, including the rotor constraint protection time and the phase lock signal mask time. The following are possible ways of determining the value of this capacitor. (1) If removing chattering from the phase lock state signal is most important : Select a capacitance that can assure an adequate mask time. (2) If startup time is more important than chattering : Select a capacitance such that the rotor constraint protection circuit does not operate at startup time and verify that there are no problems with the clock cutoff protection circuit and initial reset time. Operation of the rotor constraint protection circuit may hinder the study of motor characteristics in the uncontrolled state. It is possible to only operate the initial reset function and not operate the rotor constraint protection circuit by inserting a resistor (about 390k Ω) in parallel with the capacitor between the CSD pin and ground. 15. FC Pin The capacitor connected to the FC pin is required for current limiter loop phase compensation. If the value is too low, the output will oscillate. If the value is too large, it will be easier for currents in excess of the limit value to flow during the current limit time (time before the circuit operates) in states where the output is saturated. (This is because the control response characteristics become worse.) 16. AGC Pin A capacitance that allows a certain amount of smoothing of the AGC pin voltage in the motor speed range used must be selected for the capacitor connected to the AGC pin. It is also desirable to use a capacitance that allows the AGC voltage to reach an essentially stabilized voltage before the initial reset is cleared. (If the capacitance is too large, the rate of change of the AGC voltage will become slower.) SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents 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. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. 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 Semiconductor Co.,Ltd. product that you intend to use. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require 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 consent of SANYO Semiconductor Co.,Ltd. This catalog provides information as of August, 2008. Specifications and information herein are subject to change without notice. |
Nº de peça semelhante - LB11872H |
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Descrição semelhante - LB11872H |
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