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The RT9465 is a switch-mode single cell li-Ion/Li-Polymer battery charger for portable applications. It integrates a synchronous PWM controller and high accuracy voltage regulation. Besides, the charging current is regulated through the integrated sensing MOSFET. The RT9465 optimizes the charging task by using a control algorithm to vary the charge rate via different modes, including fast charge mode and constant voltage mode. The key charge parameters are programmable via the I<sup>2</sup>C interface. The junction temperature is monitored by ADC. Other features include under-voltage protection, over- voltage protection (including V<sub>BAT</sub> and V<sub>IN</sub> side), thermal regulation and MIVR. The RT9465 is available in a WQFN-16L 3x3 package.
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<div class="spec-list"><ul class="lv1"><li>Input Voltage Range : 3.9V to 14V </li><li>Synchronous 1.5MHz/0.75MHz Switching Frequency 95% Max. Duty </li><li>Up to 92%/94% Peak Efficiency at V<sub>IN</sub> = 9V/5V </li><li>V<sub>IN</sub> Over-Voltage Protection : 14.5V </li><li>V<sub>IN</sub> Under-Voltage Protection : 3.8V </li><li>V<sub>IN</sub> Under-Voltage-Lock-Out : 3.3V </li><li>Fault Detection (V<sub>IN</sub> and V<sub>BAT</sub> Monitoring) </li><li>Programmable Minimum Input Voltage Range : 3.9V to 13.4V (0.1V/Step) </li><li>Programmable Battery Voltage Regulation Range : 3.8V to 5.06V (0.02V/Step) </li><li>Programmable End of Charge Range : 0.6A to 1.6A (0.1A/Step) </li><li>Programmable Average Output Current Regulation Range : 0.6A to 3A (0.1A/Step) </li><li>Junction Temperature Monitor : 60°C to 116°C (4°C/Step) </li><li>V<sub>IN</sub> Minimum Input Voltage Regulation (MIVR) : ±3% </li><li>Battery CV (Constant Voltage) Regulation : ±1% </li><li>Output CC (Constant Current) Regulation, Output Current < 1A : ±100mA (V<sub>IN</sub> = 9V/12V) </li><li>Output CC (Constant Current) Regulation, Output Current > 1A : ±10% (V<sub>IN</sub> = 9V/12V) </li><li>Junction Temperature Monitor Accuracy : ±3°C </li><li>Thermal Shutdown : 160°C </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Cellular Telephones </li><li>Personal Information Appliances </li><li>Tablet PC, Power Bank </li><li>Portable Instruments </li></ul></div>
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