LB11872H 查看數據表（PDF） - SANYO -> Panasonic

零件编号

产品描述 (功能)

生产厂家

LB11872H

For Polygonal Mirror Motors Three-Phase Brushless Motor Driver

SANYO -> Panasonic 

LB11872H

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 390kΩ) 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.

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.

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.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed

for volume production.

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.

This catalog provides information as of August, 2008. Specifications and information herein are subject

to change without notice.

PS No.7257-11/11

Share Link: