specifications of any and all sanyo semiconductor co.,ltd. 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. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment. the products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for new introduction or other application different from current conditions on the usage of automotive device, communication device, office equipment, industrial equipment etc. , please consult with us about usage conditi on (temperature, operation time etc.) prior to the intended use. if there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. 62012 sy 20120207-s00003 no.a2086-1/4 LA5797MC overview the LA5797MC is a charge pump step-up po wer supply for variable capacitance diodes. features ? by using charge pump, no coils are necessary. ? time-base generator (140khz) incorporated. ? thermal shutdown circuit incorporated. specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit input voltage v in max 30 v allowable power dissipation pd max mounted on the specified board. * 0.75 w operating temperature topr -25 to +90 c storage temperature tstg -40 to +150 c junction temperature tjmax 150 c * specified board: 114.3mm 76.1mm 1.6mm, glass epoxy board. caution 1) absolute maximum ratings represent the va lue which cannot be exceeded for any length of time. caution 2) even when the device is used within the range of absolu te maximum ratings, as a result of continuous usage under hig h temperature, high current, high voltage, or drastic temperature change, the reliability of the ic may be degraded. please contact us for the further details. recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit input voltage range v in 7.5 to 28 v monolithic linear ic for variable capacitance diodes charge pump step-up power supply orderin g numbe r : ena2086
LA5797MC no.a2086-2/4 electrical characteristics at ta = 25 c parameter symbol conditions ratings unit min typ max reference voltage vfb v in = 15v, i o = 5ma 1.189 1.225 1.261 v switching frequency f v in = 7.5v to 28v 112 140 168 khz thermal shutdown operating temperature tsd designed target value. * 165 c thermal shutdown hysteresis width tsd designed target value. * 15 c * design target value: no measurement made. package dimensions unit : mm (typ) 3424 pin assignment 1 v in 2 en 3 nc 4 nc 8 7 6 5 vret cpout gnd fb top view sanyo : soic8 4.9 3.9 6.0 12 8 0.835 0.375 0.2 0.42 1.27 0.175 1.75 max -25 0 25 50 75 100 125 0 0.2 1.0 0.8 0.6 0.4 pd max -- ta 90 0.36 0.75 ambient temperature, ta -- c allowable power dissipation, pd max -- w specified board: 114.3 76.1 1.6mm 3 glass epoxy board.
LA5797MC no.a2086-3/4 block diagram v in en reg. osc vref drive on/off amp. drive on/off cpout fb vret gnd tsd nc nc application circuit example external circuit diagram (v cc = 24v) gnd LA5797MC cpout 24v v cc vret 31-32v fb en
LA5797MC ps no.a2086-4/4 external circuit diagram (v cc = 15v) gnd LA5797MC cpout 15v v cc vret 31-32v fb en note : the ic is made active when the en pin is pulled down to gnd. the charge pump operation is stopped when the en pin is pulled up to v in . this catalog provides information as of jun, 2012. 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 specif ications of any and all sanyo semiconductor co.,ltd. products described or contained herein. regarding monolithic semiconductors, if you should intend to use this ic continuously under high temperature, high current, high voltage, or drastic temperature change, even if it is used within the range of absolute maximum ratings or operating conditions, there is a possibility of decrease reliability. please contact us for a confirmation. 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 equ ipment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. 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 intellectual property rights which has resulted from the use of the technical information and products mentioned above.
|
