https://community.element14.com/products/devtools/product-pages/w/documents/22402/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supplyProduct Detail Documentsen-USTelligent Community 12https://community.element14.com/products/devtools/product-pages/w/documents/22402/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supplyFri, 05 May 2023 16:02:52 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:20964c9e-7e97-4588-ab4c-0001c8885b50e14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22402/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply#commentsCurrent Revision posted to Documents by e14-publisher on 5/5/2023 4:02:52 PM<br /> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for 3.3V Input, ±12V (±15V) Output Isolated Power Supply</h1> <div class="xs-mb3"><span class="bold xs-mr1">Manufactured By:</span>Maxim Integrated</div> <div class="xs-flex md-flex-row xs-flex-column"> <div class="md-w40 xs-w100"> <div id="devtool-primary-image" class="devtool-primary-image-container fill-white"> <img alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x192_1579633403.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" /> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x121_1579633403.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" /> </div> <div class="xs-flex xs-flex-wrap xs-mt2"> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x192_1579633403.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x121_1579633403.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" /> </div> </div> </div> <div class="md-w60 md-pl4 md-pl4 md-pt0 xs-w100 xs-pl0 xs-pl0 xs-pt2"> <div class="xs-flex xs-flex-justify-space-between xs-flex-align-center xs-border-lighter fill-white xs-p2"> <div class="xs-mt1 xs-mb1"> <div class="xs-text-5"><span class="bold xs-mr1">Part Number:</span><span id="part-number-value">MAXREFDES7</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-7d83e" data-at-areainteracted="design-center" data-at-type="click" data-at-link-type="button" href="javascript:void(0)" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('7d83e'));" data-farnell="2530801" data-newark="" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </div> </div> </div> </div> <div class="xs-mt3"> The Lakewood design (MAXREFDES7#) uses an H-bridgetransformer driver (MAX256) and a pair of low dropout (LDO) linearregulators (MAX1659 x2) to create a &plusmn;12V (&plusmn;15V) output isolated power supply from a 3.3V voltage input. This general-purpose power solution can be used in many different types of isolated power applications. <br /><br />The Lakewood subsystem reference design operates from a 3.3V DC power source. The MAX256 H-bridge transformer driver switches at approximately 475kHz and drives the primary side of the 1:2.6 turns ratio, with the use of a TGM-H281NF transformer from Halo&reg; Electronics. The transformer secondary side is connected to voltage doublers that rectify the AC outputs into DC outputs. Two MAX1659 LDOs regulate the voltages to 12V and -12V, respectively. The Zener diodes (D3 and D6) protect the LDOs by keeping their input voltages below 16.1V.<br /><br /><strong>Applications:</strong> <ul> <li>Industrial sensors</li> <li>Process control</li> <li>Industrial automation</li> <li>Medical</li> </ul> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Isolated power</li> <li>&plusmn;12V (&plusmn;15V) outputs</li> <li>Small&nbsp;printed circuit board&nbsp;(PCB) area</li> <li>Pmod&trade;-compatible form factor</li> </ul> <h3 class="toc-item xs-pb2 xs-border-bottom">Ships With</h3> <ul> <li>Board</li> </ul> <div id="devtool-required-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Required Tools</h3> <div id="devtool-required-devtools-content"></div> </div> <div id="devtool-accessory-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Accessory Tools</h3> <div id="devtool-accessory-devtools-content"></div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Documents</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Application Note</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://pdfserv.maximintegrated.com/en/an/REFD5510.pdf" target="_blank">Lakewood (MAXREFDES7#): 3.3V Input, ±12V (±15V) Output Isolated Power Supply (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Data Sheet</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX1658-MAX1659.pdf" target="_blank">MAX1659 350mA, 16.5V Input, Low-Dropout Linear Regulators (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX256.pdf" target="_blank">MAX256 3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies (pdf)</a> </div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Downloads</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Bill of Materials</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-BOM-RB.pdf" target="_blank">Bill of Materials (BOM) for MAXREFDES7 (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Schematics/Layout Files</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/images/appnotes/5510/MAXREFDES7-schematic-RB.pdf" target="_blank">Schematic for MAXREFDES7 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-layout-RB.pdf" target="_blank">PCB Layout for MAXREFDES7 (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/cad-layout/gerber/MAXREFDES7_GERBER-RB.ZIP" target="_blank">PCB Gerber for MAXREFDES7 (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Simulation Model/CAD Models</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-CAD-RB.zip" target="_blank">PCB CAD (PADS 9.0) for MAXREFDES7 (zip)</a> </div> </div> </div> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3815, "type": "devtool", "part_number": "MAXREFDES7" };</script> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: MAX256, MAX1659, mcu, maxim, development_platforms_kits, reference_designs</div> https://community.element14.com/products/devtools/product-pages/w/documents/22402/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply/revision/3Thu, 16 Dec 2021 23:34:01 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:20964c9e-7e97-4588-ab4c-0001c8885b50e14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22402/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply#commentsRevision 3 posted to Documents by e14-publisher on 12/16/2021 11:34:01 PM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3815, "type": "devtool", "part_number": "MAXREFDES7" };</script> </div> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for 3.3V Input, ±12V (±15V) Output Isolated Power Supply</h1> <div class="xs-mb3"><span class="bold xs-mr1">Manufactured By:</span>Maxim Integrated</div> <div class="xs-flex md-flex-row xs-flex-column"> <div class="md-w40 xs-w100"> <div id="devtool-primary-image" class="devtool-primary-image-container fill-white"> <img alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x192_1579633403.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" /> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x121_1579633403.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" /> </div> <div class="xs-flex xs-flex-wrap xs-mt2"> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x192_1579633403.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x121_1579633403.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" /> </div> </div> </div> <div class="md-w60 md-pl4 md-pl4 md-pt0 xs-w100 xs-pl0 xs-pl0 xs-pt2"> <div class="xs-flex xs-flex-justify-space-between xs-flex-align-center xs-border-lighter fill-white xs-p2"> <div class="xs-mt1 xs-mb1"> <div class="xs-text-5"><span class="bold xs-mr1">Part Number:</span><span id="part-number-value">MAXREFDES7</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-7efa5" data-at-areainteracted="design-center" data-at-type="click" data-at-link-type="button" href="javascript:void(0)" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('7efa5'));" data-farnell="2530801" data-newark="" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </div> </div> </div> </div> <div class="xs-mt3"> The Lakewood design (MAXREFDES7#) uses an H-bridgetransformer driver (MAX256) and a pair of low dropout (LDO) linearregulators (MAX1659 x2) to create a &plusmn;12V (&plusmn;15V) output isolated power supply from a 3.3V voltage input. This general-purpose power solution can be used in many different types of isolated power applications. <br /><br />The Lakewood subsystem reference design operates from a 3.3V DC power source. The MAX256 H-bridge transformer driver switches at approximately 475kHz and drives the primary side of the 1:2.6 turns ratio, with the use of a TGM-H281NF transformer from Halo&reg; Electronics. The transformer secondary side is connected to voltage doublers that rectify the AC outputs into DC outputs. Two MAX1659 LDOs regulate the voltages to 12V and -12V, respectively. The Zener diodes (D3 and D6) protect the LDOs by keeping their input voltages below 16.1V.<br /><br /><strong>Applications:</strong> <ul> <li>Industrial sensors</li> <li>Process control</li> <li>Industrial automation</li> <li>Medical</li> </ul> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Isolated power</li> <li>&plusmn;12V (&plusmn;15V) outputs</li> <li>Small&nbsp;printed circuit board&nbsp;(PCB) area</li> <li>Pmod&trade;-compatible form factor</li> </ul> <h3 class="toc-item xs-pb2 xs-border-bottom">Ships With</h3> <ul> <li>Board</li> </ul> <div id="devtool-required-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Required Tools</h3> <div id="devtool-required-devtools-content"></div> </div> <div id="devtool-accessory-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Accessory Tools</h3> <div id="devtool-accessory-devtools-content"></div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Documents</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Application Note</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://pdfserv.maximintegrated.com/en/an/REFD5510.pdf" target="_blank">Lakewood (MAXREFDES7#): 3.3V Input, ±12V (±15V) Output Isolated Power Supply (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Data Sheet</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX1658-MAX1659.pdf" target="_blank">MAX1659 350mA, 16.5V Input, Low-Dropout Linear Regulators (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX256.pdf" target="_blank">MAX256 3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies (pdf)</a> </div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Downloads</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Bill of Materials</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-BOM-RB.pdf" target="_blank">Bill of Materials (BOM) for MAXREFDES7 (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Schematics/Layout Files</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/images/appnotes/5510/MAXREFDES7-schematic-RB.pdf" target="_blank">Schematic for MAXREFDES7 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-layout-RB.pdf" target="_blank">PCB Layout for MAXREFDES7 (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/cad-layout/gerber/MAXREFDES7_GERBER-RB.ZIP" target="_blank">PCB Gerber for MAXREFDES7 (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Simulation Model/CAD Models</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-CAD-RB.zip" target="_blank">PCB CAD (PADS 9.0) for MAXREFDES7 (zip)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: MAX256, MAX1659, mcu, maxim, development_platforms_kits, reference_designs</div> https://community.element14.com/products/devtools/product-pages/w/documents/22402/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply/revision/2Thu, 16 Dec 2021 03:21:58 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:20964c9e-7e97-4588-ab4c-0001c8885b50e14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22402/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply#commentsRevision 2 posted to Documents by e14-publisher on 12/16/2021 3:21:58 AM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3815, "type": "devtool", "part_number": "MAXREFDES7" };</script> </div> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for 3.3V Input, ±12V (±15V) Output Isolated Power Supply</h1> <div class="xs-mb3"><span class="bold xs-mr1">Manufactured By:</span>Maxim Integrated</div> <div class="xs-flex md-flex-row xs-flex-column"> <div class="md-w40 xs-w100"> <div id="devtool-primary-image" class="devtool-primary-image-container fill-white"> <img alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x192_1579633403.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" /> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x121_1579633403.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" /> </div> <div class="xs-flex xs-flex-wrap xs-mt2"> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x192_1579633403.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x121_1579633403.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" /> </div> </div> </div> <div class="md-w60 md-pl4 md-pl4 md-pt0 xs-w100 xs-pl0 xs-pl0 xs-pt2"> <div class="xs-flex xs-flex-justify-space-between xs-flex-align-center xs-border-lighter fill-white xs-p2"> <div class="xs-mt1 xs-mb1"> <div class="xs-text-5"><span class="bold xs-mr1">Part Number:</span><span id="part-number-value">MAXREFDES7</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-da0be" data-at-areainteracted="design-center" data-at-type="click" data-at-link-type="button" href="javascript:void(0)" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('da0be'));" data-farnell="" data-newark="" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </div> </div> </div> </div> <div class="xs-mt3"> The Lakewood design (MAXREFDES7#) uses an H-bridgetransformer driver (MAX256) and a pair of low dropout (LDO) linearregulators (MAX1659 x2) to create a &plusmn;12V (&plusmn;15V) output isolated power supply from a 3.3V voltage input. This general-purpose power solution can be used in many different types of isolated power applications. <br /><br />The Lakewood subsystem reference design operates from a 3.3V DC power source. The MAX256 H-bridge transformer driver switches at approximately 475kHz and drives the primary side of the 1:2.6 turns ratio, with the use of a TGM-H281NF transformer from Halo&reg; Electronics. The transformer secondary side is connected to voltage doublers that rectify the AC outputs into DC outputs. Two MAX1659 LDOs regulate the voltages to 12V and -12V, respectively. The Zener diodes (D3 and D6) protect the LDOs by keeping their input voltages below 16.1V.<br /><br /><strong>Applications:</strong> <ul> <li>Industrial sensors</li> <li>Process control</li> <li>Industrial automation</li> <li>Medical</li> </ul> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Isolated power</li> <li>&plusmn;12V (&plusmn;15V) outputs</li> <li>Small&nbsp;printed circuit board&nbsp;(PCB) area</li> <li>Pmod&trade;-compatible form factor</li> </ul> <h3 class="toc-item xs-pb2 xs-border-bottom">Ships With</h3> <ul> <li>Board</li> </ul> <div id="devtool-required-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Required Tools</h3> <div id="devtool-required-devtools-content"></div> </div> <div id="devtool-accessory-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Accessory Tools</h3> <div id="devtool-accessory-devtools-content"></div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Documents</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Application Note</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://pdfserv.maximintegrated.com/en/an/REFD5510.pdf" target="_blank">Lakewood (MAXREFDES7#): 3.3V Input, ±12V (±15V) Output Isolated Power Supply (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Data Sheet</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX1658-MAX1659.pdf" target="_blank">MAX1659 350mA, 16.5V Input, Low-Dropout Linear Regulators (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX256.pdf" target="_blank">MAX256 3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies (pdf)</a> </div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Downloads</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Bill of Materials</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-BOM-RB.pdf" target="_blank">Bill of Materials (BOM) for MAXREFDES7 (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Schematics/Layout Files</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/images/appnotes/5510/MAXREFDES7-schematic-RB.pdf" target="_blank">Schematic for MAXREFDES7 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-layout-RB.pdf" target="_blank">PCB Layout for MAXREFDES7 (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/cad-layout/gerber/MAXREFDES7_GERBER-RB.ZIP" target="_blank">PCB Gerber for MAXREFDES7 (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Simulation Model/CAD Models</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-CAD-RB.zip" target="_blank">PCB CAD (PADS 9.0) for MAXREFDES7 (zip)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: MAX256, MAX1659, mcu, maxim, development_platforms_kits, reference_designs</div> https://community.element14.com/products/devtools/product-pages/w/documents/22402/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply/revision/1Mon, 18 Oct 2021 20:24:57 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:20964c9e-7e97-4588-ab4c-0001c8885b50e14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22402/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply#commentsRevision 1 posted to Documents by e14-publisher on 10/18/2021 8:24:57 PM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3815, "type": "devtool", "part_number": "MAXREFDES7" };</script> </div> <div id="product-page-content"> <h1 class="xs-mt0 xs-mb2">Reference Design for 3.3V Input, ±12V (±15V) Output Isolated Power Supply</h1> <div class="xs-mb3"><span class="bold xs-mr1">Manufactured By:</span>Maxim Integrated</div> <div class="xs-flex md-flex-row xs-flex-column"> <div class="md-w40 xs-w100"> <div id="devtool-primary-image" class="devtool-primary-image-container fill-white"> <img alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x192_1579633403.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" /> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x121_1579633403.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" /> </div> <div class="xs-flex xs-flex-wrap xs-mt2"> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x192_1579633403.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" alt="image" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x121_1579633403.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" /> </div> </div> </div> <div class="md-w60 md-pl4 md-pl4 md-pt0 xs-w100 xs-pl0 xs-pl0 xs-pt2"> <div class="xs-flex xs-flex-justify-space-between xs-flex-align-center xs-border-lighter fill-white xs-p2"> <div class="xs-mt1 xs-mb1"> <div class="xs-text-5"><span class="bold xs-mr1">Part Number:</span><span id="part-number-value">MAXREFDES7</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-4adbc" data-at-areainteracted="rte-content" data-at-type="click" data-at-link-type="button" href="javascript:void(0)" data-at-label="PRODUCT_POPUP_OPEN"class="e14-embedded e14_shopping-cart-far e14-button" onclick="event.preventDefault();e14.func.displayProduct(e14.meta.user.country, this, 'embedded-link', e14.func.getProductLinkJSON('4adbc'));" data-farnell="2530801" data-newark="" data-comoverride="" data-cmpoverride="" data-cpc="" data-avnetemea="" data-avnetema="" data-avnetasia="" >Buy Now</a> </div> </div> </div> </div> <div class="xs-mt3"> The Lakewood design (MAXREFDES7#) uses an H-bridgetransformer driver (MAX256) and a pair of low dropout (LDO) linearregulators (MAX1659 x2) to create a &plusmn;12V (&plusmn;15V) output isolated power supply from a 3.3V voltage input. This general-purpose power solution can be used in many different types of isolated power applications. <br /><br />The Lakewood subsystem reference design operates from a 3.3V DC power source. The MAX256 H-bridge transformer driver switches at approximately 475kHz and drives the primary side of the 1:2.6 turns ratio, with the use of a TGM-H281NF transformer from Halo&reg; Electronics. The transformer secondary side is connected to voltage doublers that rectify the AC outputs into DC outputs. Two MAX1659 LDOs regulate the voltages to 12V and -12V, respectively. The Zener diodes (D3 and D6) protect the LDOs by keeping their input voltages below 16.1V.<br /><br /><strong>Applications:</strong> <ul> <li>Industrial sensors</li> <li>Process control</li> <li>Industrial automation</li> <li>Medical</li> </ul> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Features</h3> <ul> <li>Isolated power</li> <li>&plusmn;12V (&plusmn;15V) outputs</li> <li>Small&nbsp;printed circuit board&nbsp;(PCB) area</li> <li>Pmod&trade;-compatible form factor</li> </ul> <h3 class="toc-item xs-pb2 xs-border-bottom">Ships With</h3> <ul> <li>Board</li> </ul> <div id="devtool-required-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Required Tools</h3> <div id="devtool-required-devtools-content"></div> </div> <div id="devtool-accessory-devtools-section" class="xs-hide"> <h3 class="toc-item xs-pb2 xs-mb1 xs-border-bottom">Accessory Tools</h3> <div id="devtool-accessory-devtools-content"></div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Documents</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Application Note</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://pdfserv.maximintegrated.com/en/an/REFD5510.pdf" target="_blank">Lakewood (MAXREFDES7#): 3.3V Input, ±12V (±15V) Output Isolated Power Supply (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Data Sheet</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX1658-MAX1659.pdf" target="_blank">MAX1659 350mA, 16.5V Input, Low-Dropout Linear Regulators (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="https://datasheets.maximintegrated.com/en/ds/MAX256.pdf" target="_blank">MAX256 3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies (pdf)</a> </div> </div> <h3 class="toc-item xs-pb2 xs-border-bottom">Downloads</h3> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Bill of Materials</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-BOM-RB.pdf" target="_blank">Bill of Materials (BOM) for MAXREFDES7 (pdf)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Schematics/Layout Files</h4> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/images/appnotes/5510/MAXREFDES7-schematic-RB.pdf" target="_blank">Schematic for MAXREFDES7 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-layout-RB.pdf" target="_blank">PCB Layout for MAXREFDES7 (pdf)</a> </div> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/cad-layout/gerber/MAXREFDES7_GERBER-RB.ZIP" target="_blank">PCB Gerber for MAXREFDES7 (zip)</a> </div> </div> <div class="xs-px2"> <h4 class="xs-pb2 xs-border-bottom">Simulation Model/CAD Models</h4> <div class="attachment xs-mb3"> <i class="fal fa-file-archive"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5510/MAXREFDES7-CAD-RB.zip" target="_blank">PCB CAD (PADS 9.0) for MAXREFDES7 (zip)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: MAX256, MAX1659, mcu, maxim, development_platforms_kits, reference_designs</div>