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The RT9758 is a high efficiency and high charge current charger for high voltage application. The efficiency is up to 98.1% when V<sub>OUT</sub> = 10V, I<sub>OUT</sub> = 2A, switching frequency = 500kHz, dual phase with VBUS input in cap divider mode. The RT9758 maximum charge current is up to 5A. The device integrates cap divider topology (DIV2 mode), direct charge topology (Bypass mode), an input reverse blocking NFET, a dual-phase charge pump core, the <span class="overline">EN</span> pin control and 9-way protection. In present mode (<span class="overline">EN</span> = H), the host can still order the command by I<sup>2</sup>C serial interface.<br /><br />The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.
RT9758 Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Integrated Bidirectional Bypass Mode and Cap Divider Mode (DIV2 Mode) </li><li>Input Reverse Blocking NFET between WRX_IN Pin and VBUS Pin <ul class="lv2"> <li></li><li>Block the Reverse Current </li></ul> </li><li>Dual-Phase Charge Pump Core <ul class="lv2"> <li></li><li>5A Output Current Capability </li><li>Efficiency Up to 98.1% when V<sub>OUT</sub> = 10V, I<sub>OUT</sub> = 2A, Switching Frequency = 500kHz and Dual Phase with VBUS Input in DIV2 Mode </li><li>300kHz to 1.5MHz Variable Switching Frequency Stay Out of Audio Band </li><li>Spread Spectrum Technology for EMI Reduction </li><li>Adjustable Single-Phase or Dual-Phase for DIV2 Mode </li><li>Programmable Pre-Charge Current and Pre-Charge Timing for Charge Soft-Start </li><li>Support Converter Soft-Start with 200mA Loading </li></ul> </li><li>Support Synchronize Function for Parallel Application </li><li>Operation Mode Transfer Automatically between Bypass Mode and DIV2 Mode (AT_Function) </li><li>I<sup>2</sup>C is Available when Device in Present Mode </li><li>3-Error Charge Pump Switch Protection <ul class="lv2"> <li></li><li>VBUS Voltage Too Low Error Protection before Switch (VBUS_LOW_ERR) </li><li>CFLY Short Error Protection Before Switch (CFLY_DIAG) </li><li>Converter Over-Current Protection (CON_OCP) </li></ul> </li><li>6-Way System Protection <ul class="lv2"> <li></li><li>VBUS Over-Voltage Protection (VBUS_OVP) </li><li>IBUS Over-Current Protection (IBUS_OCP) </li><li>VOUT Over-Voltage Protection (VOUT_OVP) </li><li>WRX Reverse Over-Current Protection (WRX_IRE_OCP) </li><li>VOUT Short Error Protection Before Charge (VOUT_ERR) </li><li>Junction Over-Temperature Protection (TDIE_OTP) </li></ul> </li></ul></div>
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RT9758 Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Smart Phones </li><li>Tablet </li><li>PC </li></ul></div>
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