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The RT9490 is a highly-integrated 5A Buck-Boost switch mode battery charge management and system power path management device for 2-4 cell Li-Ion and Li-polymer battery. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I<sup>2</sup>C serial interface with charging and system settings makes the device a truly flexible solution.<br /><br />The recommended junction temperature range is -40°C to 130°C, and the ambient temperature range is -40°C to 85°C.
RT9490 Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>High Efficiency, 750kHz/1MHz/1.5MHz Programmable Frequencies, Synchronous Switch-Mode Buck-Boost Charger <ul class="lv2"> <li></li><li>96.7% Charge Efficiency at 2A with 9V Input and 8V Battery </li><li>Supports 3.6V to 24V Input Voltage Range </li><li>Average Input Current Regulation (AICR) </li><li>Minimum Input Voltage Regulation (MIVR) </li></ul> </li><li>Supports USB On-The-Go (OTG) <ul class="lv2"> <li></li><li>93.8% OTG Efficiency at 2A with 8.4V Battery and 5V Output </li><li>Output Voltage with 10mV resolution to support USB-PD </li><li>BAT Current Limit Regulation (BCLR) </li></ul> </li><li>Supports Dual Input Selection </li><li>Supports BC1.2, Host mode and FRS/Seamless </li><li>Supports 11-Channel, 16-bit ADC </li><li>Low Battery Quiescent Current </li><li>High Accuracy for Charger CV and ICHG </li><li>Protection <ul class="lv2"> <li></li><li>Over-Temperature Protection (OTP) </li><li>Junction Thermal Regulation (JTR) </li><li>Input Protection (VAC OVP/VBUS OVP/OCP) </li><li>Battery Overvoltage Protection (VBAT OVP) </li><li>System Voltage Protection (VSYS OVP/UVP) </li><li>System Over-Load Protection (VSYS OLP) </li><li>Cycle-by-Cycle Overcurrent Protection (OCP) </li><li>OTG Low Battery Protection (OTG LBP) </li><li>OTG Voltage Protection (OTG OVP/UVP) </li></ul> </li></ul></div>
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RT9490 Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Smart Phone/Tablet/Chrome Book </li><li>Drone </li><li>Portable Device and Accessory </li></ul></div>
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