https://community.element14.com/products/devtools/product-pages/w/documents/22416/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/22416/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supplyFri, 05 May 2023 16:03:01 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:da3b8322-c1b6-486c-9274-de58da1a561ae14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22416/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply#commentsCurrent Revision posted to Documents by e14-publisher on 5/5/2023 4:03:01 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 src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x210_1579633416.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x131_1579633416.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </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" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x210_1579633416.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x131_1579633416.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </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">MAXREFDES8</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-afe59" 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('afe59'));" data-farnell="2530802" 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 Riverside design (MAXREFDES8#) uses an H-bridge transformerdriver (MAX256) and a low dropout (LDO) linear regulator (MAX1659) to create a 12V (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 Riverside 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 a voltage doubler that rectifies the AC output into DC output. The MAX1659 LDO regulates the voltage to 12V. The Zener diode D3 protects the LDO by keeping its input voltage 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>12V (15V) output</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/REFD5512.pdf" target="_blank">Riverside (MAXREFDES8#): 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/MAX256.pdf" target="_blank">MAX256 3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies (pdf)</a> </div> <div class="attachment xs-mb3"> <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> <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/5512/MAXREFDES8-BOM-RB.pdf" target="_blank">Bill of materials (BOM) for MAXREFDES8 (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/5512/MAXREFDES8-schematic-RB.pdf" target="_blank">Schematic for MAXREFDES8 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5512/MAXREFDES8-layout-RB.pdf" target="_blank">PCB Layout for MAXREFDES8 (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/MAXREFDES8_GERBER-RB.ZIP" target="_blank">PCB Gerber for MAXREFDES8 (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/5512/MAXREFDES8-CAD-RB.zip" target="_blank">PCB CAD (PADS 9.0) for MAXREFDES8 (zip)</a> </div> </div> </div> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3831, "type": "devtool", "part_number": "MAXREFDES8" };</script> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: MAX256, H-bridge transformerdriver, MAX1659, low dropout, mcu, maxim, development_platforms_kits, reference_designs, linear regulator</div> https://community.element14.com/products/devtools/product-pages/w/documents/22416/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply/revision/3Thu, 16 Dec 2021 23:34:09 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:da3b8322-c1b6-486c-9274-de58da1a561ae14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22416/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply#commentsRevision 3 posted to Documents by e14-publisher on 12/16/2021 11:34:09 PM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3831, "type": "devtool", "part_number": "MAXREFDES8" };</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 src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x210_1579633416.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x131_1579633416.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </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" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x210_1579633416.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x131_1579633416.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </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">MAXREFDES8</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-70c42" 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('70c42'));" data-farnell="2530802" 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 Riverside design (MAXREFDES8#) uses an H-bridge transformerdriver (MAX256) and a low dropout (LDO) linear regulator (MAX1659) to create a 12V (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 Riverside 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 a voltage doubler that rectifies the AC output into DC output. The MAX1659 LDO regulates the voltage to 12V. The Zener diode D3 protects the LDO by keeping its input voltage 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>12V (15V) output</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/REFD5512.pdf" target="_blank">Riverside (MAXREFDES8#): 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/MAX256.pdf" target="_blank">MAX256 3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies (pdf)</a> </div> <div class="attachment xs-mb3"> <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> <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/5512/MAXREFDES8-BOM-RB.pdf" target="_blank">Bill of materials (BOM) for MAXREFDES8 (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/5512/MAXREFDES8-schematic-RB.pdf" target="_blank">Schematic for MAXREFDES8 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5512/MAXREFDES8-layout-RB.pdf" target="_blank">PCB Layout for MAXREFDES8 (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/MAXREFDES8_GERBER-RB.ZIP" target="_blank">PCB Gerber for MAXREFDES8 (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/5512/MAXREFDES8-CAD-RB.zip" target="_blank">PCB CAD (PADS 9.0) for MAXREFDES8 (zip)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: MAX256, H-bridge transformerdriver, MAX1659, low dropout, mcu, maxim, development_platforms_kits, reference_designs, linear regulator</div> https://community.element14.com/products/devtools/product-pages/w/documents/22416/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply/revision/2Thu, 16 Dec 2021 03:22:08 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:da3b8322-c1b6-486c-9274-de58da1a561ae14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22416/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply#commentsRevision 2 posted to Documents by e14-publisher on 12/16/2021 3:22:08 AM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3831, "type": "devtool", "part_number": "MAXREFDES8" };</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 src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x210_1579633416.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x131_1579633416.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </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" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x210_1579633416.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x131_1579633416.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </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">MAXREFDES8</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-0ab5d" 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('0ab5d'));" 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 Riverside design (MAXREFDES8#) uses an H-bridge transformerdriver (MAX256) and a low dropout (LDO) linear regulator (MAX1659) to create a 12V (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 Riverside 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 a voltage doubler that rectifies the AC output into DC output. The MAX1659 LDO regulates the voltage to 12V. The Zener diode D3 protects the LDO by keeping its input voltage 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>12V (15V) output</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/REFD5512.pdf" target="_blank">Riverside (MAXREFDES8#): 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/MAX256.pdf" target="_blank">MAX256 3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies (pdf)</a> </div> <div class="attachment xs-mb3"> <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> <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/5512/MAXREFDES8-BOM-RB.pdf" target="_blank">Bill of materials (BOM) for MAXREFDES8 (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/5512/MAXREFDES8-schematic-RB.pdf" target="_blank">Schematic for MAXREFDES8 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5512/MAXREFDES8-layout-RB.pdf" target="_blank">PCB Layout for MAXREFDES8 (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/MAXREFDES8_GERBER-RB.ZIP" target="_blank">PCB Gerber for MAXREFDES8 (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/5512/MAXREFDES8-CAD-RB.zip" target="_blank">PCB CAD (PADS 9.0) for MAXREFDES8 (zip)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: MAX256, H-bridge transformerdriver, MAX1659, low dropout, mcu, maxim, development_platforms_kits, reference_designs, linear regulator</div> https://community.element14.com/products/devtools/product-pages/w/documents/22416/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply/revision/1Mon, 18 Oct 2021 20:25:08 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:da3b8322-c1b6-486c-9274-de58da1a561ae14-publisherhttps://community.element14.com/products/devtools/product-pages/w/documents/22416/reference-design-for-3-3v-input-12v-15v-output-isolated-power-supply#commentsRevision 1 posted to Documents by e14-publisher on 10/18/2021 8:25:08 PM<br /> <div class="xs-hide"> <script>e14.meta.page.devtools={"id": 3831, "type": "devtool", "part_number": "MAXREFDES8" };</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 src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x210_1579633416.png" class="devtool-image-devtool-0 xs-w100 xs-full-height fill-white obj-fit-contain xs-block" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x131_1579633416.png" class="devtool-image-devtool-1 xs-w100 xs-full-height fill-white obj-fit-contain xs-hide" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </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" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x210_1579633416.png" id="devtool-0" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </div> <div class="devtool-thumbnail fill-white xs-border-lighter txt-center xs-mr1 xs-mb2"> <img loading="lazy" src="https://community-dc-assets.element14.com/images/devtool/size500/reference_design_for_33v_input_12v_15v_output_isolated_power_supply_500x131_1579633416.png" id="devtool-1" class="xs-w100 xs-full-height obj-fit-contain" alt="Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply" /> </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">MAXREFDES8</span></div> </div> <div class="xs-text-right xs-mr2"> <a id="e14-product-link-3dc96" 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('3dc96'));" data-farnell="2530802" 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 Riverside design (MAXREFDES8#) uses an H-bridge transformerdriver (MAX256) and a low dropout (LDO) linear regulator (MAX1659) to create a 12V (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 Riverside 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 a voltage doubler that rectifies the AC output into DC output. The MAX1659 LDO regulates the voltage to 12V. The Zener diode D3 protects the LDO by keeping its input voltage 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>12V (15V) output</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/REFD5512.pdf" target="_blank">Riverside (MAXREFDES8#): 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/MAX256.pdf" target="_blank">MAX256 3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies (pdf)</a> </div> <div class="attachment xs-mb3"> <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> <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/5512/MAXREFDES8-BOM-RB.pdf" target="_blank">Bill of materials (BOM) for MAXREFDES8 (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/5512/MAXREFDES8-schematic-RB.pdf" target="_blank">Schematic for MAXREFDES8 (pdf)</a> </div> <div class="attachment "> <i class="fal fa-file-pdf"></i> <a href="http://www.maximintegrated.com/design/tools/appnotes/5512/MAXREFDES8-layout-RB.pdf" target="_blank">PCB Layout for MAXREFDES8 (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/MAXREFDES8_GERBER-RB.ZIP" target="_blank">PCB Gerber for MAXREFDES8 (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/5512/MAXREFDES8-CAD-RB.zip" target="_blank">PCB CAD (PADS 9.0) for MAXREFDES8 (zip)</a> </div> </div> </div> <div style="clear:both;"></div> <div style="font-size: 90%;">Tags: MAX256, H-bridge transformerdriver, MAX1659, low dropout, mcu, maxim, development_platforms_kits, reference_designs, linear regulator</div>