LA4270 Ver la hoja de datos (PDF) - SANYO -> Panasonic
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LA4270 Datasheet PDF : 9 Pages
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LA4270
Proper Cases in Using IC
• Maximum ratings : If the IC is used in the vicinity of the maximum ratings, even a slight variation in conditions may
cause the maximum ratings to be exceeded, thereby leading to breakdown. Allow an ample margin
of variation for supply voltage, etc. and use the IC in the range where the maximum ratings are not
exceeded.
•Pin-to-pin short : If power is applied when the space between pins is shorted, breakdown or deterioration may occur.
When mounting the IC on the board or applying power, make sure that the space between pins is not
shorted with solder, etc.
• When used in radio applications : When using in radios, allow a good distance between IC and bar antenna.
• Printed circuit pattern : When drawing the printed circuit pattern, make the power supply, output, and ground lines thick
and short and arrange the pattern and parts so that no feedback loop is formed between input and
output. Place power capacitor C10, oscillatoin blocking capacitors C7, C8 as close to IC pins as
possible to prevent oscillation from occurring. Refer to the sample printed circuit pattern.
Proper Cares Mounting Radiator Fin
1. The mounting torque is in the range of 39 to 59N · cm.
2. The distance between screw holes of the radiator fin must coincide with the distance between screw holes of the IC.
With case outline dimensions L and R referred to, the screws must be tightend with the distance between them as close
to each other as possible.
3. The screw to be used must have a head equivalent to the truss machine screw or binder machine screw defined by JIS.
Washers must be also used to protect the IC case.
4. No foreign matter such as cutting particles shall exist between heat sink and radiator fin. When applying grease on the
junction surface, it must be applied uniformly on the whole surface.
5. IC lead pins are soldered to the printed circuit board after the radiator fin is mounted on the IC.
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 February, 2000. Specifications and information herein are subject
to change without notice.
PS No.1724–9/9
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