LB11920 Datasheet, PDF (10/10 Pages) Sanyo Semicon Device – Three-Phase Brushless Motor Driver for Office Equipment Applications

LB11920
Continued from preceding page.
10. Power supply stabilization
This IC has a large output current, which causes deviation of the power line readily. To ensure stability, it is
necessary to insert a capacitor with sufficient capacitance between the VM pin and GND. To eliminate the high-
frequency noise due to switching, insert a ceramic capacitor of about 0.1 µF as near as possible to the pin between
VM (pin 5) and GND 2 (pin 3).
When inserting diode in the power line to prevent breakdown due to reverse connection of power supply, select the
sufficiently large capacitance because the power line tends to develop deviation readily.
The V_CC voltage that is a control power supply must also be fully stabilized by means of a capacitor when such
voltage tends to fluctuate because of routing.
11. Routing of a printed circuit board
Two pins are provided for each of VM, RF, and GND2 pins where large current flows. On the printed circuit board,
both of these pins should be connected and used. If the use of only one pin is possible in certain cases, use pins 3, 5,
and 6.
GND3 that is a sub-GND (internal separation layer) should be connected with control GND or GND1 with the
shortest possible wiring.
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 October, 2003. Specifications and information herein are subject
to change without notice.
PS No. 7229-10/10