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The RT9756A is a high-efficiency and high charge current charger. The efficiency is up to 98.2% when V<sub>BAT</sub> = 4V, I<sub>BAT</sub> = 2A with a maximum charge current of up to 8A in DIV2 mode. In bypass mode, the efficiency is up to 99.1% when V<sub>BAT</sub> = 4V and I<sub>BAT</sub> = 1A, with a maximum charger current of up to 5A. The device integrates smart cap divider topology, direct charging mode, external overvoltage protection control, an input reverse blocking N-MOSFET and 2-way regulation, a dual-phase charge pump core, 14-way protection, 9-way system alarm, 8-channel high-speed analog-to-digital converter and USB BC 1.2 detection. The high-speed analog-to-digital converter provides input and output voltage, current, and temperature information to the host, which can be monitored via the I<sup>2</sup>C serial interface. The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.
RT9756A Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Integrate Cap Divider Mode (DIV2 Mode) and Direct Charging Mode (Bypass Mode) </li><li>Support USB BC1.2 </li><li>External OVP MOS Control and Regulation - High Absolute Maximum Rating of 37V - 100ns Fast Reaction Time and 100ns Fast Turn-Off Time - VBAT Voltage Regulation (VBAT REG) - IBAT Current Regulation (IBAT REG) </li><li>Dual-Phase Charge Pump Core - 8A Output Current Capability - Efficiency up to 98.2% when V<sub>BAT</sub> = 4V, I<sub>BAT</sub> = 2A (DIV2 Mode) - Efficiency Up to 99.1% when V<sub>BAT</sub> = 4V, I<sub>BAT</sub> = 1A (Bypass Mode) - 100kHz to 1000kHz Variable Switching Frequency Stay Out of Audio Band - Spread Spectrum Technology for EMI Reduction </li><li>8-Channel 12-bit ADC - High Speed Data Rate for 128 Times Average Per Channel - 8-Channel (VBUS, IBUS, VOUT, VBAT, IBAT, TDIE, DP, DM) for Voltage/Current/Temperature Measurement </li><li>Input Reverse Blocking N-MOSFET - Block the Reverse Current </li><li>3-Error Charge Pump Switch Protection </li><li>11-Way System Protection </li><li>9-Way System Alarm </li></ul></div>
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RT9756A Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Smart Phones </li><li>Tablets </li></ul></div>
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