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參數(shù)資料
| 型號： | LB1814M |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | DISK DRIVE MOTOR CONTROLLER, 1 A, PDSO36 |
| 封裝： | 0.375 INCH, MFP-36 |
| 文件頁數(shù)： | 5/13頁 |
| 文件大小： | 162K |
| 代理商： | LB1814M |
LB1814M
No.5198-13/13
7. Servo constants
When calculating the servo constants, they will be heavily dependent on the motor actually used. Since experience is
generally required, these constants should be determined by the motor manufacturer. We can provide the IC
characteristics data required for the servo constants calculations as well as frequency characteristics simulation data
for the filter constants set by the motor manufacturer.
8. IC internal power dissipation calculation example (calculated at standard ratings)
(1) Power save mode (VCC=5V, S/B pin = open, N pin voltage VN=5V)
Ps = PICC2 + PN
=VCC × ICC2 + VN × (VN/50k)
=5V
× 180A + 5V × (5V/50k)
=1.4mW
(2) In start mode
Example: VCC=5V, IO=0.1A
Intercoil voltage VRm=Rm
× IO + Reverse electromotive force =2.0V
Output source transistor C-to-E voltage VCE1 = 2.9V
Output sink transistor C-to-E voltage VCE2 = 0.1V
HB pin sink current = 1mA, HB pin voltage = 4V
1) Power dissipation due to current drain ICC: P1 = VCC × ICC = 5V × 21mA = 0.105W
2) Power dissipation due to the Hall bias current: P2 = VHB × IHB = 4V × 1mA = 0.004W
3) Power dissipation due to the output drive current: P3 = (IO/100) × (VCE1 – 0.7V) + (IO/100 × 1.5) × (VCC – 0.7V)
= 1mA
× 2.2V + 1.5mA × 4.3V = 0.009W
4) Power dissipation due to the output transistor: P4 = VCE1 × IO + VCE2 × IO
= 2.9V
× 0.1A + 0.1V × 0.1A = 0.300W
5) The IC’s total power dissipation in start mode: P = P1 + P2 + P3 + P4 = 0.42W
9. Measuring the IC's temperature rise
We recommend using the electrostatic breakdown prevention diode between the LD and ground pins of this IC.
Disconnect the external pull-up resistor on LD pin when measuring.
(SANYO data: Approx. –2mV/
°C at ILD = –500A, VCC = 5V, LD pin off)
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.
PS
This catalog provides information as of March, 2007. Specifications and information herein are subject
to change without notice.
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