overview

1. Purpose

<p class="MsoNormal">The RT9750 is a 6A smart load switch battery charger, which integrates an internal load switch with charge pump control and 3-path constant current/constant voltage regulation, a 5-way hardware protection, and a 8-Channel 12-bit analog-to-digital converter. This document explains the function and use of the RT9750 evaluation board (EVB), and provides information to enable operation, modification of the evaluation board and circuit to suit individual requirements.</p>

2. Introduction

<h3>General Product Information</h3> <p class="bady">The RT9750 is a 6A smart load switch battery charger, which integrates an internal load switch with charge pump control and 3-path constant current/constant voltage regulation, a 5-way hardware protection, and a 8-Channel 12-bit analog-to-digital converter. The RT9750 provides the accurate analog-to-digital converter for voltage/current measurement by I²C serial interface to report the battery charging parameters and 3-way software protection and flags.</p>

3. Product Feature

<ul> <li>Internal Load Switch with Charge Pump Control</li> ►Dual NFETs in a Back to Back Configuration<br /> ►Internal Charge Pump Control <li>3-Path CC/CV Regulation</li> ►Input Current Regulation (ICR)<br /> ►Output Voltage Regulation (OVR)<br /> ►Battery Voltage Regulation (BVR) <li>5-Way Hardware Protection</li> ►VBUS Over-Voltage Protection (VBUS_OVP)<br /> ►Drop-Out Over-Voltage Protection (VDR_OVP)<br /> ►Reverse Over-Current Protection (RE_OCP)<br /> ►Junction Over-Temperature Protection (TJ_OTP)<br /> ►Input Over-Current Protection (IOC_OCP) <li>8-Channel 12-bit ADC</li> ►High Accuracy of 12-bit Resolution<br /> ►8-Channel for Voltage/Current Measurement<br /> ►High Speed Data Rate for 8/16 Times Average per Channel <li>3-Way Software Protection</li> ►Drop-Out Over-Voltage Protection Alarm (VDR_ALM)<br /> ►TS of the VBUS Over-Temperature Protection (TBUS_OTP)<br /> ►TS of the BAT Over-Temperature Protection (TBAT_OTP) </ul>

4. Key Performance Summary Table

<table width="673" class="MsoTableLightListAccent2" style="border: currentColor; width: 504.8pt; margin-left: 5.4pt; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 17pt;"> <td style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 34.24%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Key Features</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.76%; height: 17pt;"> <p class="ListParagraph1CxSpLast">Evaluation Board Number : PCB095_V1</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.24%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Input Voltage</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.76%; height: 17pt;"> <p class="ListParagraph1CxSpLast">3V to 6V</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.24%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Output Voltage</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.76%; height: 17pt;"> <p class="ListParagraph1CxSpLast">3V to 6V</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.24%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Maximum Output Current</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.76%; height: 17pt;"> <p class="ListParagraph1CxSpLast">6A</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 34.24%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">Marking & Package Type</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 65.76%; height: 17pt;"> <p class="ListParagraph1CxSpLast">RT9750WSC, WL-CSP-42B 2.75x3.05</p> </td> </tr> </tbody> </table>

5. Bench Test Setup Conditions

<h3>Headers Description and Placement</h3> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image001_en.png" class="fancybox"><img width="426" height="302" width="426" height="302" id="圖片 12" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image001_en.png" /></a></p> <p class="2">Carefully inspect all the components used in the EVB according to the following Bill of Materials table, and then make sure all the components are undamaged and correctly installed. If there is any missing or damaged component, which may occur during transportation, please contact our distributors or e-mail us at <a href="mailto:evb_service@richtek.com" class="link">evb_service@richtek.com</a>.</p>

6. Test Points

<p class="MsoNormal">The EVB is provided with the test points and pin names listed in the table below.</p> <table width="680" class="MsoTableLightListAccent2" style="border: currentColor; width: 510.2pt; margin-left: 5.4pt; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 1cm;"> <td style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 12.76%; height: 1cm;"> <p class="23CxSpFirst">Test point/</p> <p class="23CxSpMiddle">Pin name</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.84%; height: 1cm;"> <p class="23CxSpMiddle">Signal</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 62.4%; height: 1cm;"> <p class="23CxSpLast">Comment (expected waveforms or voltage levels on test points)</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 12.76%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">VBUS</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.84%; height: 17pt;"> <p class="ListParagraph1CxSpLast">Input voltage</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 62.4%; height: 17pt;"> <p class="MsoNormal">DC input power supply.</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 12.76%; height: 17pt;"> <p class="ListParagraph1">VOUT</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.84%; height: 17pt;"> <p class="MsoNormal">Output voltage</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 62.4%; height: 17pt;"> <p class="MsoNormal">Battery connection point to positive terminal of the battery pack.</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 12.76%; height: 17pt;"> <p class="ListParagraph1CxSpFirst">GND</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.84%; height: 17pt;"> <p class="ListParagraph1CxSpMiddle">Ground</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 62.4%; height: 17pt;"> <p class="ListParagraph1CxSpLast">Ground.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 12.76%; height: 1cm;"> <p class="ListParagraph1CxSpFirst">TSVBUS</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.84%; height: 1cm;"> <p class="ListParagraph1CxSpLast">VBUS temperature qualification voltage input</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 62.4%; height: 1cm;"> <p class="MsoNormal">VBUS temperature qualification voltage input. Require an external resistor divider and a voltage reference.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 12.76%; height: 1cm;"> <p class="ListParagraph1CxSpFirst">TSBAT</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.84%; height: 1cm;"> <p class="ListParagraph1CxSpLast">VBAT temperature qualification voltage input</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 62.4%; height: 1cm;"> <p class="MsoNormal">Battery temperature qualification voltage input. Require an external resistor divider and a voltage reference.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 12.76%; height: 1cm;"> <p class="ListParagraph1">EN</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.84%; height: 1cm;"> <p class="MsoNormal">Enable pin</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 62.4%; height: 1cm;"> <p class="MsoNormal">Device enable control pin. Pull low to disable device. I²C not available</p> <p class="MsoNormal">when disabled.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 12.76%; height: 1cm;"> <p class="ListParagraph1">INT</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.84%; height: 1cm;"> <p class="MsoNormal">Intterrupt</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 62.4%; height: 1cm;"> <p class="MsoNormal">Open drain interrupt output. connect to pull-up voltage via 10kΩ pull-up resistor. Normally high, the INT pin sends an active low.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 12.76%; height: 1cm;"> <p class="MsoNormal">SDA</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.84%; height: 1cm;"> <p class="MsoNormal">SDA</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 62.4%; height: 1cm;"> <p class="MsoNormal">I²C interface data. Connect to pull-up voltage via 10kΩ pull-up resistor.</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 12.76%; height: 1cm;"> <p class="ListParagraph1">SCL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.84%; height: 1cm;"> <p class="MsoNormal">SCL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 62.4%; height: 1cm;"> <p class="MsoNormal">I²C interface clock. Connect to pull-up voltage via 10kΩ pull-up resistor.</p> </td> </tr> </tbody> </table>

7. Power-up & Measurement Procedure

<p class="MsoListParagraph">1. Connect input power (3V < V_BUS < 6V) and input ground to VIN and GND test pins respectively.</p> <p class="MsoListParagraph">2. Connect positive end and negative terminals of VBAT to VOUT and GND test pins respectively.</p> <p class="MsoListParagraph">3. There is a 3-pin header “High” for pull-up control. To use a jumper at “VBUS” option to tie pull up pin to input power VIN. Use a jumper at “VOUT” option to tie pull-up test pin to battery.</p> <p class="MsoListParagraph">4. There is a 3-pin header “EN” for enable control. To use a jumper at “High” option to tie EN test pin to high level for enabling the device. Inversely, to use a jumper at “GND” option to tie EN test pin and ground GND for disabling the device.</p>

8. Schematic, Bill of Materials & Board Layout

<h3>EVB Schematic Diagram</h3> <p class="21"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image002_en.jpg" class="fancybox"><img width="680" height="525" width="680" height="525" id="圖片 14" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image002_en.jpg" /></a></p>

9. Bill of Materials

<table width="680" class="MsoTableLightListAccent2" style="border: currentColor; margin-left: 5.4pt; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 17pt;"> <td style="background: #009eb8; padding: 0cm 5.4pt; border: 1pt solid #009eb8; width: 13.44%; height: 17pt;"> <p class="MsoNormal">Reference</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.22%; height: 17pt;"> <p class="MsoNormal">Qty</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.98%; height: 17pt;"> <p class="MsoNormal">Part Number</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.92%; height: 17pt;"> <p class="MsoNormal">Description</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 23.24%; height: 17pt;"> <p class="MsoNormal">Package</p> </td> <td style="background: #009eb8; border-width: 1pt 1pt 1pt medium; border-style: solid solid solid none; border-color: #009eb8 #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 14.2%; height: 17pt;"> <p class="MsoNormal">Manufacturer</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 13.44%; height: 17pt;"> <p class="MsoNormal">U1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.22%; height: 17pt;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.98%; height: 17pt;"> <p class="MsoNormal">RT9750WSC</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.92%; height: 17pt;"> <p class="MsoNormal">Smart Load Switch</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 23.24%; height: 17pt;"> <p class="MsoNormal">WL-CSP-42B 2.75x3.05</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 14.2%; height: 17pt;"> <p class="MsoNormal">RICHTEK</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 13.44%; height: 17pt;"> <p class="MsoNormal">C7</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.22%; height: 17pt;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.98%; height: 17pt;"> <p class="MsoNormal">GRM21BR61E106KA73L</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.92%; height: 17pt;"> <p class="MsoNormal">10µF/25V/X5R</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 23.24%; height: 17pt;"> <p class="MsoNormal">C-0805</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 14.2%; height: 17pt;"> <p class="MsoNormal">muRata</p> </td> </tr> <tr style="height: 17pt;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 13.44%; height: 17pt;"> <p class="MsoNormal">C8</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.22%; height: 17pt;"> <p class="MsoNormal">1</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.98%; height: 17pt;"> <p class="MsoNormal">C1608X5R1E105K080AC</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.92%; height: 17pt;"> <p class="MsoNormal">1µF/25V/X5R</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 23.24%; height: 17pt;"> <p class="MsoNormal">C-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 14.2%; height: 17pt;"> <p class="MsoNormal">TDK</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 13.44%; height: 1cm;"> <p class="MsoNormal">R2, R3, R5, R7, R8</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.22%; height: 1cm;"> <p class="MsoNormal">5</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.98%; height: 1cm;"> <p class="MsoNormal">WR06X1002FTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.92%; height: 1cm;"> <p class="MsoNormal">10k</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 23.24%; height: 1cm;"> <p class="MsoNormal">R-0603</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 14.2%; height: 1cm;"> <p class="MsoNormal">WALSIN</p> </td> </tr> <tr style="height: 1cm;"> <td style="border-width: medium 1pt 1pt; border-style: none solid solid; border-color: currentColor #009eb8 #009eb8; padding: 0cm 5.4pt; width: 13.44%; height: 1cm;"> <p class="MsoNormal">R9, R10, R11, R12</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 5.22%; height: 1cm;"> <p class="MsoNormal">4</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 24.98%; height: 1cm;"> <p class="MsoNormal">WR04X1001FTL</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 18.92%; height: 1cm; white-space: nowrap;"> <p class="MsoNormal">1k/1%</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 23.24%; height: 1cm;"> <p class="MsoNormal">R-0402</p> </td> <td style="border-width: medium 1pt 1pt medium; border-style: none solid solid none; border-color: currentColor #009eb8 #009eb8 currentColor; padding: 0cm 5.4pt; width: 14.2%; height: 1cm;"> <p class="MsoNormal">WALSIN</p> </td> </tr> </tbody> </table>

10. PCB Layout

<p class="23CxSpFirst"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image003_en.jpg" class="fancybox"><img width="492" height="353" width="492" height="353" id="圖片 2" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image003_en.jpg" /></a></p> <p class="23CxSpLast">Top View (1^st layer)</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image004_en.jpg" class="fancybox"><img width="491" height="352" width="491" height="352" id="圖片 3" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image004_en.jpg" /></a></p> <p class="10">PCB Layout—Inner Side (2^nd Layer)</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image005_en.jpg" class="fancybox"><img width="491" height="352" width="491" height="352" id="圖片 5" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image005_en.jpg" /></a></p> <p class="10">PCB Layout—Inner Side (3^rd Layer)</p> <p class="MsoNormal"><a href="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image006_en.jpg" class="fancybox"><img width="492" height="353" width="492" height="353" id="圖片 6" style="border-width: 0px; border-style: solid;" alt="Technical Document Image Preview" src="/content/dam/richtek-eds/resources/evaluation-boards/evb_rt9750wsc/html-images/image006_en.jpg" /></a></p> <p class="MsoNormal">Bottom View (4^th Layer)</p>