Bootstrapping circuit | Forum for Electronics

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It may not display this or other websites correctly.<br />You should upgrade or use an <a href="https://www.google.com/chrome/" target="_blank" rel="noopener">alternative browser</a>.</div> <div class="p-body-header"> <div class="p-title "> <h1 class="p-title-value">Bootstrapping circuit</h1> </div> <div class="p-description"> <ul class="listInline listInline--bullet"> <li> <i class="fa--xf fal fa-user" aria-hidden="true" title="Thread starter"></i> <span class="u-srOnly">Thread starter</span> <a href="/members/traxx.691245/" class="username u-concealed" dir="auto" data-user-id="691245" data-xf-init="member-tooltip">traxx</a> </li> <li> <i class="fa--xf fal fa-clock" aria-hidden="true" title="Start date"></i> <span class="u-srOnly">Start date</span> <a href="/threads/bootstrapping-circuit.412937/" class="u-concealed"><time class="u-dt" dir="auto" datetime="2024-11-07T10:49:03+0000" data-time="1730976543" data-date-string="Nov 7, 2024" data-time-string="10:49 AM" title="Nov 7, 2024 at 10:49 AM">Nov 7, 2024</time></a> </li> </ul> </div> </div> <div class="p-body-main p-body-main--withSidebar "> <div class="p-body-contentCol"></div> <div class="p-body-sidebarCol"></div> <div class="p-body-content">  <div id='div-gpt-eda_wallpaper'> <script> googletag.cmd.push(function() { googletag.display('div-gpt-eda_wallpaper'); }); </script> </div> <div class="p-body-pageContent"> <div class="block block--messages " data-xf-init="lightbox select-to-quote" data-message-selector=".js-post" data-lb-id="thread-412937"> <div class="block-outer"></div> <div class="block-outer js-threadStatusField"></div> <div class="block-container"> <div class="block-body"> <article class="message message--post js-post js-inlineModContainer " data-author="traxx" data-content="post-1783516" id="js-post-1783516" > <span class="u-anchorTarget" id="post-1783516"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/bootstrapping-circuit.412937/post-1783516" rel="nofollow" > <time class="u-dt" dir="auto" datetime="2024-11-07T10:49:03+0000" data-time="1730976543" data-date-string="Nov 7, 2024" data-time-string="10:49 AM" title="Nov 7, 2024 at 10:49 AM">Nov 7, 2024</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/bootstrapping-circuit.412937/post-1783516" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1783516/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/bootstrapping-circuit.412937/post-1783516" rel="nofollow"> #1 </a> </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" > <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/traxx.691245/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="691245" data-xf-init="member-tooltip" style="background-color: #33cc33; color: #0f3d0f"> <span class="avatar-u691245-m" role="img" aria-label="traxx">T</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/traxx.691245/" class="username " dir="auto" data-user-id="691245" data-xf-init="member-tooltip">traxx</a></h4> <h5 class="userTitle message-userTitle" dir="auto">Newbie</h5> </div> <img src="/styles/images/ranks/alevel2.gif" alt="Newbie level 2"> <div class="message-userExtras"> <dl class="pairs pairs--justified joinedBlock"> <dt>Joined</dt> <dd>Nov 7, 2024</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed"> <dt>Messages</dt> <dd>2</dd> </dl> <dl class="pairs pairs--justified"> <dt> Helped</dt> <dd>0</dd> </dl> <dl class="pairs pairs--justified"> <dt>Reputation </dt> <dd> <a href="/reputation/authors/traxx.691245" class="fauxBlockLink-linkRow u-concealed">0</a> </dd> </dl> <dl class="pairs pairs--justified"> <dt>Reaction score</dt> <dd>0</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed trophyBlock"> <dt>Trophy points</dt> <dd>1</dd> </dl> <dl class="pairs pairs--justified creditBlock"> <dt title="Activity points">Activity points</dt> <dd> <a href="/activity/" data-xf-click="overlay" class="fauxBlockLink-blockLink u-concealed"> 17 </a> </dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1783516" data-lb-caption-desc="traxx · Nov 7, 2024 at 10:49 AM"> <article class="message-body js-selectToQuote"> <div > <div class="bbWrapper">Hello,<br /> <br /> can someone explain this circuit in detail? Thank you!<br /> <br /> <a href="https://www.circuitlab.com/editor/#?id=nds8yxxwdvq9" target="_blank" class="link link--external" rel="nofollow ugc noopener">https://www.circuitlab.com/editor/#?id=nds8yxxwdvq9</a><br /> <br /> All what I can see on this circuit is, if SW1 is open SW2 is closed and vice versa.<br /> But off course there is a lot of things going on here.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-actionBar actionBar"> <div class="actionBar-set actionBar-set--external"> <a href="/threads/bootstrapping-circuit.412937/reply?quote=1783516" class="actionBar-action actionBar-action--reply" title="Reply, quoting this message" rel="nofollow" data-xf-click="quote" data-quote-href="/posts/1783516/quote">Reply</a> </div> </div> <div class="reactionsBar js-reactionsList "> </div> <br/> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> </div> </div> </div> <div class="block block--messages" data-xf-init="" data-type="post" data-href="/inline-mod/" data-search-target="*"> <span class="u-anchorTarget" id="posts"></span> <div class="block-outer"><div class="block-outer-opposite"> <div class="tabs tabs--standalone tabs--standalone--small tabs--standalone--inline"> <a href="/threads/bootstrapping-circuit.412937/" class="tabs-tab is-active" rel="nofollow"> Sort by date </a> <a href="/threads/bootstrapping-circuit.412937/?order=vote_score" class="tabs-tab " rel="nofollow"> Sort by votes </a> </div> </div></div> <div class="block-container lbContainer" data-xf-init="lightbox select-to-quote" data-message-selector=".js-post" data-lb-id="thread-412937" data-lb-universal="0"> <div class="block-body js-replyNewMessageContainer"> <article class="message message--post js-post js-inlineModContainer " data-author="BradtheRad" data-content="post-1783536" id="js-post-1783536" itemscope itemtype="https://schema.org/Answer" itemid="https://www.edaboard.com/posts/1783536/"> <meta itemprop="parentItem" itemscope itemid="https://www.edaboard.com/threads/bootstrapping-circuit.412937/" /> <span class="u-anchorTarget" id="post-1783536"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/bootstrapping-circuit.412937/post-1783536" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2024-11-07T13:24:07+0000" data-time="1730985847" data-date-string="Nov 7, 2024" data-time-string="1:24 PM" title="Nov 7, 2024 at 1:24 PM" itemprop="datePublished">Nov 7, 2024</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/bootstrapping-circuit.412937/post-1783536" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1783536/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/bootstrapping-circuit.412937/post-1783536" rel="nofollow"> #2 </a> </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.edaboard.com/members/bradtherad.423852/"> <meta itemprop="url" content="https://www.edaboard.com/members/bradtherad.423852/" /> <div class="message-avatar message-avatar--online"> <div class="message-avatar-wrapper"> <a href="/members/bradtherad.423852/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="423852" data-xf-init="member-tooltip" style="background-color: #a32929; color: #e69999"> <span class="avatar-u423852-m" role="img" aria-label="BradtheRad">B</span> </a> <span class="message-avatar-online" tabindex="0" data-xf-init="tooltip" data-trigger="auto" title="Online now"></span> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/members/bradtherad.423852/" class="username " dir="auto" data-user-id="423852" data-xf-init="member-tooltip"><span class="username--staff username--moderator" itemprop="name">BradtheRad</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle">Super Moderator</h5> <div class="userBanner userBanner--staff message-userBanner" dir="auto" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Staff member</strong><span class="userBanner-after"></span></div> </div> <img src="/styles/images/ranks/hlevel4.gif" alt="Advanced Member level 7"> <div class="message-userExtras"> <dl class="pairs pairs--justified joinedBlock"> <dt>Joined</dt> <dd>Apr 1, 2011</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed"> <dt>Messages</dt> <dd>15,601</dd> </dl> <dl class="pairs pairs--justified"> <dt> Helped</dt> <dd>2,912</dd> </dl> <dl class="pairs pairs--justified"> <dt>Reputation </dt> <dd> <a href="/reputation/authors/bradtherad.423852" class="fauxBlockLink-linkRow u-concealed">5,836</a> </dd> </dl> <dl class="pairs pairs--justified"> <dt>Reaction score</dt> <dd>3,050</dd> </dl> <dl class="pairs pairs--justified pairs--xbBoxed trophyBlock"> <dt>Trophy points</dt> <dd>1,393</dd> </dl> <dl class="pairs pairs--justified locationBlock"> <dt>Location</dt> <dd> <a href="/misc/location-info?location=Minneapolis%2C+Minnesota%2C+USA" rel="nofollow noreferrer" target="_blank" class="u-concealed">Minneapolis, Minnesota, USA</a> </dd> </dl> <dl class="pairs pairs--justified creditBlock"> <dt title="Activity points">Activity points</dt> <dd> <a href="/activity/" data-xf-click="overlay" class="fauxBlockLink-blockLink u-concealed"> 116,838 </a> </dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1783536" data-lb-caption-desc="BradtheRad · Nov 7, 2024 at 1:24 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Suppose we apply 12V to turn On M1. This causes the node labelled 'out' to convey 12V. That has the effect of negating the bias on M1 which makes M1 shut off (entirely or partially). Hence to keep M1 turned on its bias voltage must be a few volts greater than its source voltage.<br /> <br /> This creates the need for a bootstrap capacitor. Ideally C1 is switched so it acquires 12V and becomes part of a voltage doubler. This is switched to apply 24V to M1 bias at the proper time turning it On.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="message-actionBar actionBar"> <div class="actionBar-set actionBar-set--external"> <a href="/threads/bootstrapping-circuit.412937/reply?quote=1783536" class="actionBar-action actionBar-action--reply" title="Reply, quoting this message" rel="nofollow" data-xf-click="quote" data-quote-href="/posts/1783536/quote">Reply</a> </div> </div> <div class="reactionsBar js-reactionsList is-active"> <ul class="reactionSummary"> <li><span class="reaction reaction--small reaction--1" data-reaction-id="1"><i aria-hidden="true"></i><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="reaction-sprite js-reaction" alt="Like" title="Like" /></span></li> </ul> <span class="u-srOnly">Reactions:</span> <a class="reactionsBar-link" href="/posts/1783536/reactions" data-xf-click="overlay" data-cache="false" rel="nofollow"><bdi>traxx</bdi></a> </div> <br/> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> <div class="message-cell message-cell--vote"> <div class="message-column"> <div class="contentVote js-contentVote " data-xf-init="content-vote" data-content-id="post-1783536"> <meta itemprop="upvoteCount" content="0" /> <a href="javascript:" class="contentVote-vote is-disabled contentVote-vote--up " data-vote="up"><span class="u-srOnly">Upvote</span></a> <span class="contentVote-score js-voteCount" data-score="0">0</span> <a href="javascript:" class="contentVote-vote is-disabled contentVote-vote--down " data-vote="down"><span class="u-srOnly">Downvote</span></a> </div> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="aliarifat794" data-content="post-1783545" id="js-post-1783545" itemscope itemtype="https://schema.org/Answer" itemid="https://www.edaboard.com/posts/1783545/"> <meta itemprop="parentItem" itemscope itemid="https://www.edaboard.com/threads/bootstrapping-circuit.412937/" /> <span class="u-anchorTarget" id="post-1783545"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/threads/bootstrapping-circuit.412937/post-1783545" rel="nofollow" itemprop="url"> <time class="u-dt" dir="auto" datetime="2024-11-07T15:14:50+0000" data-time="1730992490" data-date-string="Nov 7, 2024" data-time-string="3:14 PM" title="Nov 7, 2024 at 3:14 PM" itemprop="datePublished">Nov 7, 2024</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/threads/bootstrapping-circuit.412937/post-1783545" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/posts/1783545/share" aria-label="Share" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/threads/bootstrapping-circuit.412937/post-1783545" rel="nofollow"> #3 </a> </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.edaboard.com/members/aliarifat794.686655/"> <meta itemprop="url" content="https://www.edaboard.com/members/aliarifat794.686655/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/members/aliarifat794.686655/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="686655" data-xf-init="member-tooltip" style="background-color: #85c2e0; 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This acts as the input signal that will switch the circuit states.<br /> The square wave provides alternating high and low signals to the circuit, which will control the MOSFETs through the switching mechanism.<br /> SW1 and SW2 are configured in such a way that only one switch is closed at a time.<br /> When SW1 is closed, SW2 is open, and vice versa. This allows the square wave signal to either pass through SW1 or SW2 but not both at the same time.<br /> The switches control which MOSFET (M1 or M2) receives the signal.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="message-actionBar actionBar"> <div class="actionBar-set actionBar-set--external"> <a href="/threads/bootstrapping-circuit.412937/reply?quote=1783545" class="actionBar-action actionBar-action--reply" title="Reply, quoting this message" rel="nofollow" data-xf-click="quote" data-quote-href="/posts/1783545/quote">Reply</a> </div> </div> <div class="reactionsBar js-reactionsList is-active"> <ul class="reactionSummary"> <li><span class="reaction 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Existing boostrap drivers, e.g. IR2110 are driving gates in push-pull mode to achieve fast switching.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="message-actionBar actionBar"> <div class="actionBar-set actionBar-set--external"> <a href="/threads/bootstrapping-circuit.412937/reply?quote=1783552" class="actionBar-action actionBar-action--reply" title="Reply, quoting this message" rel="nofollow" data-xf-click="quote" data-quote-href="/posts/1783552/quote">Reply</a> </div> </div> <div class="reactionsBar js-reactionsList is-active"> <ul class="reactionSummary"> <li><span class="reaction reaction--small reaction--1" data-reaction-id="1"><i 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class="message-userContent lbContainer js-lbContainer " data-lb-id="post-1783553" data-lb-caption-desc="D.A.(Tony)Stewart · Nov 7, 2024 at 4:44 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper"><blockquote data-attributes="member: 691245" data-quote="traxx" data-source="post: 1783516" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> <a href="/goto/post?id=1783516" class="bbCodeBlock-sourceJump" rel="nofollow" data-xf-click="attribution" data-content-selector="#post-1783516">traxx said:</a> </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> Hello,<br /> <br /> can someone explain this circuit in detail? Thank you!<br /> <br /> <a href="https://www.circuitlab.com/editor/#?id=nds8yxxwdvq9" target="_blank" class="link link--external" rel="nofollow ugc noopener">https://www.circuitlab.com/editor/#?id=nds8yxxwdvq9</a><br /> <br /> All what I can see on this circuit is, if SW1 is open SW2 is closed and vice versa.<br /> But off course there is a lot of things going on here. </div> <div class="bbCodeBlock-expandLink js-expandLink"><a role="button" tabindex="0">Click to expand...</a></div> </div> </blockquote>Add Node Boost, Add expression V(Boost), V(OUT)<br /> Run TIME DOMAIN .... shows Transient Analysis<br /> Toggle signals from legend<br /> <div class="bbImageWrapper js-lbImage" title="1730997823081.png" data-src="https://www.edaboard.com/attachments/1730997823081-png.195191/" data-lb-sidebar-href="" data-lb-caption-extra-html="" data-single-image="1"> <img src="https://www.edaboard.com/attachments/1730997823081-png.195191/" data-url="" class="bbImage" data-zoom-target="1" style="" alt="1730997823081.png" title="1730997823081.png" width="871" height="768" loading="lazy" /> </div><br /> <br /> Then add 1 Ohm load</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> <div class="message-lastEdit"> Last edited: <time class="u-dt" dir="auto" datetime="2024-11-07T16:51:22+0000" data-time="1730998282" data-date-string="Nov 7, 2024" data-time-string="4:51 PM" title="Nov 7, 2024 at 4:51 PM" itemprop="dateModified">Nov 7, 2024</time> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="message-actionBar actionBar"> <div class="actionBar-set actionBar-set--external"> <a href="/threads/bootstrapping-circuit.412937/reply?quote=1783553" class="actionBar-action actionBar-action--reply" title="Reply, 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title="\oint"> <div title="Closed integral"> </div> </li> <li title="\iint"> <div title="Double integral"> </div> </li> <li title="\iiint"> <div title="Triple integral"> </div> </li> <li title="\alpha"> <div title="Alpha"> </div> </li> <li title="\beta"> <div title="Beta"> </div> </li> <li title="\gamma"> <div title="Gamma"> </div> </li> <li title="\delta"> <div title="Delta"> </div> </li> <li title="\epsilon"> <div title="Epsilon"> </div> </li> <li title="\varepsilon"> <div title="Alternative Epsilon"> </div> </li> <li title="\theta"> <div title="Theta"> </div> </li> <li title="\kappa"> <div title="Kappa"> </div> </li> <li title="\lambda"> <div title="Lambda"> </div> </li> <li title="\mu"> <div title="Mu"> </div> </li> <li title="\nu"> <div title="Nu"> </div> </li> <li title="\pi"> <div title="Pi"> </div> </li> <li title="\rho"> <div title="Rho"> </div> </li> <li title="\sigma"> <div title="Sigma"> </div> </li> <li title="\tau"> <div title="Tau"> </div> </li> <li title="\phi"> <div 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Are you sure you want to submit this form?", attach: "Attach files", rich_text_box: "Rich text box", close: "Close", link_copied_to_clipboard: "Link copied to clipboard.", text_copied_to_clipboard: "Text copied to clipboard.", loading: "Loading…", you_have_exceeded_maximum_number_of_selectable_items: "You have exceeded the maximum number of selectable items.", processing: "Processing", 'processing...': "Processing…", showing_x_of_y_items: "Showing {count} of {total} items", showing_all_items: "Showing all items", no_items_to_display: "No items to display", number_button_up: "Increase", number_button_down: "Decrease", push_enable_notification_title: "Push notifications enabled successfully at Forum for Electronics", push_enable_notification_body: "Thank you for enabling push notifications!", pull_down_to_refresh: "Pull down to refresh", release_to_refresh: "Release to refresh", refreshing: "Refreshing…" , "svStandardLib_time.day": "{count} day", "svStandardLib_time.days": "{count} days", "svStandardLib_time.hour": "{count} hour", "svStandardLib_time.hours": "{count} hours", "svStandardLib_time.minute": "{count} minutes", "svStandardLib_time.minutes": "{count} minutes", "svStandardLib_time.month": "{count} month", "svStandardLib_time.months": "{count} months", "svStandardLib_time.second": "{count} second", "svStandardLib_time.seconds": "{count} seconds", "svStandardLib_time.week": "time.week", "svStandardLib_time.weeks": "{count} weeks", "svStandardLib_time.year": "{count} year", "svStandardLib_time.years": "{count} years" }); </script> <form style="display:none" hidden="hidden"> <input type="text" name="_xfClientLoadTime" value="" id="_xfClientLoadTime" title="_xfClientLoadTime" tabindex="-1" /> </form>  <script type="application/ld+json"> { "@context": "https://schema.org", "@type": "QAPage", "url": "https://www.edaboard.com/threads/bootstrapping-circuit.412937/", "mainEntity": { "@type": "Question", "@id": "https://www.edaboard.com/threads/bootstrapping-circuit.412937/", "name": "Bootstrapping circuit", "datePublished": "2024-11-07T10:49:03+00:00", "url": "https://www.edaboard.com/threads/bootstrapping-circuit.412937/", "text": "Hello,\n\ncan someone explain this circuit in detail? Thank you!\n\nhttps://www.circuitlab.com/editor/#?id=nds8yxxwdvq9\n\nAll what I can see on this circuit is, if SW1 is open SW2 is closed and vice versa.\nBut off course there is a lot of things going on here.", "answerCount": 4, "upvoteCount": 0, "author": { "@type": "Person", "@id": "https://www.edaboard.com/members/traxx.691245/", "name": "traxx", "url": "https://www.edaboard.com/members/traxx.691245/" }, "suggestedAnswer": [ { "@type": "Answer", "datePublished": "2024-11-07T16:44:06+00:00", "dateModified": "2024-11-07T16:51:22+00:00", "url": "https://www.edaboard.com/posts/1783553/", "text": "Hello,\n\ncan someone explain this circuit in detail? Thank you!\n\nhttps://www.circuitlab.com/editor/#?id=nds8yxxwdvq9\n\nAll what I can see on this circuit is, if SW1 is open SW2 is closed and vice versa.\nBut off course there is a lot of things going on here.\n\nAdd Node Boost, Add expression V(Boost), V(OUT)\nRun TIME DOMAIN .... shows Transient Analysis\nToggle signals from legend\n\n\nThen add 1 Ohm load", "upvoteCount": 0, "author": { "@type": "Person", "@id": "https://www.edaboard.com/members/d-a-tony-stewart.134022/", "name": "D.A.(Tony)Stewart", "url": "https://www.edaboard.com/members/d-a-tony-stewart.134022/" } }, { "@type": "Answer", "datePublished": "2024-11-07T16:42:16+00:00", "url": "https://www.edaboard.com/posts/1783552/", "text": "You can run the simulation to see how it works.\n\n\n\nI doubt however, that it's a useful design template for a bootstrap gate driver. Existing boostrap drivers, e.g. IR2110 are driving gates in push-pull mode to achieve fast switching.", "upvoteCount": 0, "author": { "@type": "Person", "@id": "https://www.edaboard.com/members/fvm.152255/", "name": "FvM", "url": "https://www.edaboard.com/members/fvm.152255/" } }, { "@type": "Answer", "datePublished": "2024-11-07T15:14:50+00:00", "url": "https://www.edaboard.com/posts/1783545/", "text": "V1 is a 1 kHz square wave generator. This acts as the input signal that will switch the circuit states.\nThe square wave provides alternating high and low signals to the circuit, which will control the MOSFETs through the switching mechanism.\nSW1 and SW2 are configured in such a way that only one switch is closed at a time.\nWhen SW1 is closed, SW2 is open, and vice versa. This allows the square wave signal to either pass through SW1 or SW2 but not both at the same time.\nThe switches control which MOSFET (M1 or M2) receives the signal.", "upvoteCount": 0, "author": { "@type": "Person", "@id": "https://www.edaboard.com/members/aliarifat794.686655/", "name": "aliarifat794", "url": "https://www.edaboard.com/members/aliarifat794.686655/" } } ] }, "publisher": { "@type": "Organization", "name": "Forum for Electronics", "description": "International Electronics Discussion Forum: EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals", "url": "https://www.edaboard.com" } } </script> <script> $(function(){ var notice = $('.xb-welcome-notice'); if(notice.length){ var cookie = XF.Cookie.get('hide_welcome_notice'); if(!cookie){ XF.Cookie.set('hide_welcome_notice', Date.now()); notice.show(); } else if ((Date.now() - cookie) > 8.64e+7){ XF.Cookie.set('hide_welcome_notice', Date.now()); notice.show(); } else { notice.hide(); } } }); </script> </div> </body> </html>

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