LA4525 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LA4525

Monolithic Linear IC For Radio Cassette Recorders Dual AF Power Amplifier

SANYO -> Panasonic 

LA4525

• The voltage gain is fixed internally to 40dB in dual mode and 46dB in BTL mode. These values cannot be altered by

connecting external components.

• Phase correction capacitance (600pF/TOTAL) is incorporated in the internal stages. Oscillation damping components

(R and C) are also incorporated in the output pin circuits.

• Power consumption

Note that the 8-pin DIP does not have a heat dissipating surface and that the power dissipation ratings are critical. The

maximum power dissipation of the device is 1.25W, and 1.5W when the device is mounted on the recommended PCB.

The actual power dissipated depends on the supply voltage and the load conditions. Ensure that the device is kept within

its maximum rating. For AC supplies, transformer tappings may need to be adjusted to keep the device within

maximum ratings.

Pd max =

VCC2

π2RL

+ ICCO × VCC

Note

For BTL mode operation, the value of RL used in the calculation should be 1/2 the actual value.

• If the speaker plug jacks short to ground when connected, a protection resistor should be inserted in the output line.

• If the device is operated at or near its rated values, these values can be exceeded by small changes in operating

conditions, leading to device breakdown. Accordingly, ensure that a safety margin is maintained so as not to exceed the

maximum ratings.

• Check the PCB surface after soldering to ensure that no pins have been accidentally shorted. Any short between pins

could cause poor operating characteristics or permanently damage the device when power is applied.

• If making the PCB, check the printed wiring to ensure that no feedback loops occur between input and output.

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 April, 2008. Specifications and information herein are subject to

change without notice.

PS No. 4022-8/8

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