<!-- Bootstrap core CSS --> <link href="/css/www-style.css" rel="stylesheet"> <link href="/css/bootstrap.css" rel="stylesheet"> <link href="/css/newsletter.css" rel="stylesheet"> <link href="/css/alfontawesome-all.css" rel="stylesheet"> <!-- Custom fonts for this template --> <section> <div class="key-container"> <div class="cus-content-subscribe"> <div class="row no-gutters"> <div class=" col-md-12"> <div class="page-header"> <a class="cus-btn btn-sm" href="https://www.richtek.com/My Richtek/Newsletters.aspx"><i class="fas fa-envelope"></i> Subscribe to Richtek Newsletter</a> </div> </div> </div> </div> </div> <div class="key-container pb-5"> <!-- Title start --> <div class="cus-content"> <div class="row no-gutters "> <div class="col-md-12 "> <div class="page-header"> <h1 class="font-weight-bold">Accuracy matters! The driving force for wireless portable applications: high accuracy, low quiescent current battery power management solutions</h1> <i class="far fa-calendar-alt date-i"></i> <span class="ml-2 date">SEP. 28, 2022 | Newsletter Issue 42</span> </div> </div> </div> </div> <!-- Content End --> <div class="cus-content"> <div class="row no-gutters "> <div class="col-md-12 mb-20 text-center"> <a alt="Richtek Wearable Low Iq Total Solution-TWS" href="https://www.youtube.com/watch?v=_KewzAeAXvc&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" ><img class="img-center " style="max-width:900px;" alt="Power Management Solutions for True Wireless Stereo Earbuds" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-42/html-images/en_I42-01-en-2.jpg"></a></div> <div class="col-md-12 "> <div class="mt-2"> <div class="section-title font-weight-bold mb-40" >Power Management Solutions for True Wireless Stereo Earbuds</div> </div> </div> <div class="col-md-12 "> <br> <p> What is the role of quiescent current in Li-ion battery applications? What Richtek power solutions with ultra-low quiescent current can be found in TWS earbuds on the market? We will introduce our products with key features from a component teardown report of TWS earbuds. You can also find why Richtek products are superior to other IC suppliers’ in the comparison table. </p> <div class="btn-block pb-4"> <a href="https://www.youtube.com/watch?v=_KewzAeAXvc&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" class="btn-sm btn-primary py-2 px-3">Watch video <i class="fas fa-arrow-right pl-2"></i> </a> </div> <p> ▸ Featured products mentioned in the video: </p> </div> <div> <table class="table table-striped text-left align-middle" style="color: #323237;"> <tbody> <tr> <th scope="row">RT6160A</th> <td>3A, 2.2V~5.5Vin, 2.025V~5.2Vout, Buck-Boost converter, featuring 1µA quiescent current.</td> <td style="min-width: 140px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RT6160A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" class="link">See RT6160A</a></td> </tr> <tr> <th scope="row">RT5707/A</th> <td>0.4A/0.6A, 2.2V~5.5Vin, 1.2V~3.3Vout, HCOT Buck converters, featuring 360nA quiescent current. </td> <td style="min-width: 140px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RT5707/RT5707A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" class="link">See RT5707/A</a></td> </tr> <tr> <th scope="row">RT9471/D</th> <td>3A, 3.9V~13.5Vin, 4.7V(max) battery charge voltage, single cell switching battery charger. (RT9471 with the status indicator) </td> <td style="min-width: 140px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RT9471/RT9471D&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" class="link">See RT9471/D</a></td> </tr> <tr> <th scope="row">RT9525</th> <td>1.2A, 4.2V~6Vin, 4.2V(max) battery charge voltage, linear single cell Li-ion battery charger with auto power path.</td> <td style="min-width: 140px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RT9525&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" class="link">See RT9525</a></td> </tr> </tbody> </table> </div> <div class="col-md-12 "> <div class="mt-2"> <div class="section-title font-weight-bold mb-40" >Introducing Battery Fuel Gauges</div> </div> </div> <div class="col-md-12 "> <br> <p> What are the advantages and features of Richtek's battery fuel gauge? How did we find a solution to the challenges of SoC (State of Charge) accuracy of lithium-ion batteries? In the video, you will see the SoC test results of OPPO mobile phones, iPhones, and smart watches under high/low temperature, or 7 consecutive days of use. Can Richtek’s fuel gauge still maintain low error of SoC under different loads and temperatures with a high-capacity battery? </p> <div class="btn-block pb-4"> <a href="https://www.youtube.com/watch?v=_KewzAeAXvc#t=9m55s&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" class="btn-sm btn-primary py-2 px-3">Find more <i class="fas fa-arrow-right pl-2"></i> </a> </div> <p> ▸ Featured products mentioned in the video: </p> </div> <div> <table class="table table-striped text-left align-middle" style="color: #323237;max-width:1157px;"> <tbody> <tr> <th scope="row">RT9426A</th> <td>System-side single cell fuel gauge for single cell battery packs, featuring 14µA active current to extend battery life and accurate SoC report.</td> <td style="min-width: 140px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RT9426A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" class="link">See RT9426A</a></td> </tr> <tr> <th scope="row">RT9422A</th> <td>Pack-side single cell fuel gauge for single cell battery packs, featuring 14µA active current for longer battery life and smooth SoC dynamic Behavior.</td> <td style="min-width: 140px;"><a href="https://www.richtek.com/RedirectToProduct?specid=RT9422A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" class="link">See RT9422A</a></td> </tr> </tbody> </table> </div> <div class="col-md-12 "> <div class="mt-2"> <div class="section-title font-weight-bold mb-40" >Comprehensive Technical Support</div> </div> </div> <div class="col-md-12 "> <br> <p>You might wonder whether these battery cells can handle such high charging currents. We can assume that these cells are specially designed to have extremely low internal resistance, down to 1.2mΩ, so they don’t heat up so much under high charge or discharge currents. </p> <div class="btn-block pb-2"> <a href="https://www.youtube.com/watch?v=_KewzAeAXvc#t=24m16s&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" class="btn-sm btn-primary py-2 px-3">More details <i class="fas fa-arrow-right pl-2"></i> </a> </div> </div> <div class="col-md-12 "> <div class="mt-2"> <div class="section-title font-weight-bold mb-40" >Richtek Wearable Low Iq Total Solution-TWS</div> </div> </div> <div class="col-md-12 mb-20 text-center"> <a alt="Richtek Wearable Low Iq Total Solution-TWS" href="https://www.youtube.com/watch?v=_KewzAeAXvc&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank" ><img class="img-center " style="max-width:900px;" alt="More Applications in High Power Charging" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-42/html-images/en_I42-02-2.jpg"></a> </div> </div> </div> <!-- Content End --> <!-- Product Tittle start --> <div class="cus-content"> <div class="row no-gutters"> <div class="col-md-12 pt-3"> <div class="new-product"> <h3 class="font-weight-bold">PRODUCTS MENTIONED IN THE VIDEO</h3> <p>Check out the products that meet your area of interest for more information</p> </div> </div> </div> <!-- Product start --> <div class="row no-gutters align-items-center pb-4"> <div class="col-4 col-sm-4 col-md-4 col-lg-4 col-xl-2"> <div> <a href="https://www.richtek.com/RedirectToProduct?specid=RT4823&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank"><img class="img-fluid py-5 mx-auto" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-42/html-images/en_I42-p1-2.jpg" alt="RT4823"></a> </div> </div> <!-- img close --> <div class="col-8 col-sm-8 col-md-8 col-lg-8 col-xl-10"> <div class="new-block"> <div class="section-title">RT4822/23 <sup><span class="badge rounded-pill bg-primary text-light"><small>Preview</small></span></sup></div> <span class="text-danger">Boost Converters w/o I<sup>2</sup>C Control</span> <p> 1.5A, 1.8V~5.5Vin, 3.15V~5.5Vout, Boost converters w/o I<sup>2</sup>C control. (RT4822 with I<sup>2</sup>C interface: SCL & SDA pinout) </p> <div><a class="btn-sm btn-outline-light link py-2 px-3 border mr-2" href="https://www.richtek.com/RedirectToProduct?specid=RT4823&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank">See RT4823</a><a class="btn-sm btn-outline-light link py-2 px-3 border" href="https://www.richtek.com/SaveDownload.aspx?specid=RT4823&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank">Download Datasheet</a></div> </div> </div> <!-- content close --> </div> <!-- row close --> <div class="row no-gutters align-items-center pb-4"> <div class="col-4 col-sm-4 col-md-4 col-lg-4 col-xl-2"> <div> <a href="https://www.richtek.com/RedirectToProduct?specid=RT3181A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank"><img class="img-fluid py-1" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-42/html-images/en_I42-p2-2.jpg" alt="RT3181A"></a> </div> </div> <!-- img close --> <div class="col-8 col-sm-8 col-md-8 col-lg-8 col-xl-10"> <div class="new-block"> <div class="section-title">RT3181A</div> <span class="text-danger">Wireless Power Transmitter for 5W/15W Solutions</span> <p> Wireless power transmitter for 5W/15W applications, designed to support the WPC (Qi) standard: WPC LP A11 from a 5Vout of USB or AC adaptor or WPC MP-A5 for medium power applications. </p> <div><a class="btn-sm btn-outline-light link py-2 px-3 border mr-2" href="https://www.richtek.com/RedirectToProduct?specid=RT3181A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank">See RT3181A</a><a class="btn-sm btn-outline-light link py-2 px-3 border mr-2" href="https://www.richtek.com/SaveDownload.aspx?specid=RT3181A&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank">Download Datasheet</a></div> </div> </div> <!-- content close --> </div> <!-- row close --> <div class="row no-gutters align-items-center pb-4"> <div class="col-4 col-sm-4 col-md-4 col-lg-4 col-xl-2"> <div> <a href="https://www.richtek.com/RedirectToProduct?specid=RT3181C&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank"><img class="img-fluid py-4" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-42/html-images/en_I42-p3-2.jpg" alt="RT3181C"></a> </div> </div> <!-- img close --> <div class="col-8 col-sm-8 col-md-8 col-lg-8 col-xl-10"> <div class="new-block"> <div class="section-title">RT3181C</div> <span class="text-danger">Wireless Power Transmitter for 15W Solutions</span> <p> Wireless power transmitter for 15W applications, designed to support the WPC (Qi) standard: WPC MP-A5/MP-A11 transmitter design for medium power applications.</p> <div><a class="btn-sm btn-outline-light link py-2 px-3 border mr-2" href="https://www.richtek.com/RedirectToProduct?specid=RT3181C&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank">See RT3181C</a><a class="btn-sm btn-outline-light link py-2 px-3 border mr-2" href="https://www.richtek.com/SaveDownload.aspx?specid=RT3181C&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank">Download Datasheet</a></div> </div> </div> <!-- content close --> </div> <!-- row close --> <div class="row no-gutters align-items-center pb-4"> <div class="col-4 col-sm-4 col-md-4 col-lg-4 col-xl-2"> <div> <a href="https://www.richtek.com/RedirectToProduct?specid=RT1652&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank"><img class="img-fluid py-4" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-42/html-images/en_I42-p4-2.jpg" alt="RT1652"></a> </div> </div> <!-- img close --> <div class="col-8 col-sm-8 col-md-8 col-lg-8 col-xl-10"> <div class="new-block"> <div class="section-title">RT1652</div> <span class="text-danger">Dual-Mode WPC Wireless Power Receiver and Battery Charger</span> <p> Dual mode wireless power receiver and battery charger for 5W applications, compliant with WPC Low Power v1.2 standard.</p> <div><a class="btn-sm btn-outline-light link py-2 px-3 border mr-2" href="https://www.richtek.com/RedirectToProduct?specid=RT1652&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank">See RT1652</a><a class="btn-sm btn-outline-light link py-2 px-3 border mr-2" href="https://www.richtek.com/SaveDownload.aspx?specid=RT1652&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank">Download Datasheet</a></div> </div> </div> <!-- content close --> </div> <!-- row close --> <div class="row no-gutters align-items-center pb-4"> <div class="col-4 col-sm-4 col-md-4 col-lg-4 col-xl-2"> <div> <a href="https://www.richtek.com/RedirectToProduct?specid=RT1653&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank"><img class="img-fluid py-4" src="/content/dam/richtek-eds/resources/tech-insights/news/newsletter-issue-42/html-images/en_I42-p5-2.jpg" alt="RT1653"></a> </div> </div> <!-- img close --> <div class="col-8 col-sm-8 col-md-8 col-lg-8 col-xl-10"> <div class="new-block"> <div class="section-title">RT1653</div> <span class="text-danger">WPC Wireless Power Receiver</span> <p> Wireless power receiver for 15W applications, compliant with WPC V1.2.4 standard.</p> <div><a class="btn-sm btn-outline-light link py-2 px-3 border mr-2" href="https://www.richtek.com/RedirectToProduct?specid=RT1653&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank">See RT1653</a><a class="btn-sm btn-outline-light link py-2 px-3 border mr-2" href="https://www.richtek.com/SaveDownload.aspx?specid=RT1653&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en" target="_blank">Download Datasheet</a></div> </div> </div> <!-- content close --> </div> <!-- row close --> <!-- Keywords start --> <div class="tag-content"> <div class="row no-gutters"> <div class="col-md-12 mb-40"> <div class="new-product"> <p>Want to keep up to date with all our latest news and information? <a class="link" href="https://www.richtek.com/My Richtek/Newsletters.aspx" target="_blank">Subscribe here!</a></p> </div> </div> </div> <div class="row no-gutters align-items-start"> <div class="col-12"> <a class="badge btn-tag" href="https://www.richtek.com/Design%20Support/Search%20Everything%20Result?&Type=Everything&Keyword=Fuel+gauge&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en">Fuel gauge</a> <a class="badge btn-tag" href="https://www.richtek.com/Design%20Support/Search%20Everything%20Result?&Type=Everything&Keyword=TWS+headphone&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en">TWS headphone</a> <a class="badge btn-tag" href="https://www.richtek.com/Design%20Support/Search%20Everything%20Result?&Type=Everything&Keyword=wireless&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en">wireless</a> <a class="badge btn-tag" href="https://www.richtek.com/Design%20Support/Search%20Everything%20Result?&Type=Everything&Keyword=Battery+charging&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en">Battery charging</a> <a class="badge btn-tag" href="https://www.richtek.com/Design%20Support/Search%20Everything%20Result?&Type=Everything&Keyword=single+cell+Li-ion+battery&utm_source=Newsletter&utm_medium=RTWWW&utm_campaign=Issue42EN&sc_lang=en">single cell Li-ion battery</a> </div> </div> </div> </div> </div> </section>