LB1928_08 SANYO [Sanyo Semicon Device], LB1928_08 Datasheet - Page 11
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LB1928_08
Manufacturer Part Number
LB1928_08
Description
For Office Automation Equipment 3-phase Brushless Motor Driver
Manufacturer
SANYO [Sanyo Semicon Device]
Datasheet
1.LB1928_08.pdf
(11 pages)
11. Power supply stabilization
12. VREG stabilization
13. Integrating amplifier related component values
Because this IC provides a high output current and uses a switching drive technique, power supply line fluctuations
can occur easily. Therefore, a capacitor of sufficient capacitance (several ten µF or higher) must be connected
between the V CC pin and ground to assure stable operation. The ground connection of this capacitor must be
connected to the GND2 pin, which is the power block ground, at a point as close as possible to the IC. If, due to
problems associated with the heat sink, the (electrolytic) capacitor cannot be connected near the this pin, a ceramic
capacitor of about 0.1µF must be connected near the pin.
Since the likelihood of power line fluctuation increases if diodes are inserted in the power supply lines to prevent
destruction of the IC if power is connected with reverse polarity, a larger capacitance will be required.
A capacitor (about 0.1µF) must be connected to the VREG pin (the 5V regulator output), which functions as the
control circuit power supply, for stabilization. The ground side of this capacitor must be connected to the GND1 pin
with a lead that is as short as possible.
The external components used in the integrating amplifier must be located as close as possible to the IC to
minimize the circuit’s susceptibility to noise. These components must be located as far as possible from the motor.
This catalog provides information as of December, 2008. Specifications and information herein are subject to
change without notice.
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.
LB1928
PS No.6197-11/11