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The RT8966H is an analog subsystem which includes a linear charger, 4 LDOs, a 4-CH current source, and a multiplexer for USB, UART, microphone, stereo and audio on a single mini/micro USB connector. The RT8966H adopts an I<sup>2</sup>C bus for control and uses an internal method to determine the connected device. The USB input provides high speed USB connection. The audio inputs feature negative rail signal operation to realize simple DC coupled headset speakers. The RT8966H provides an internal device detection method by using the USB ID signal pin and the VBUS voltage. The resistor values and VBUS voltage determine the unique detection method of each accessory. The host microprocessor adopts I<sup>2</sup>C to control the switch position and read the results of the accessory detection. The RT8966H can also detect USB chargers, including dedicated chargers (D+/D- shorted) and high, power, host/hub chargers. The RT8966H has a linear charger with maximum 1A current capability. The charging current and end of charge current can be controlled by I<sup>2</sup>C interface. It also provides a 50mA LDO to support the power of the peripheral circuit. In factory mode, the RT8966H provides 4.35V/2.3A power to support system operation. The RT8966H is available in a thin WQFN-32L 4x4 package. to achieve optimized solution for PCB space and thermal considerations.
RT8966H Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Hi-Speed USB Operation </li><li>Interrupt for Device Insertion and Removal </li><li>Interrupt for SEND/END Button Detection </li><li>Interrupt for Protection Function </li><li>Low Power Microphone Standby Mode </li><li>Default Startup Mode for Factory Support </li><li>Negative Rail Audio Signal Paths </li><li>Internal LDO for Low Noise Microphone Bias </li><li>28V Maximum Rating for DC Adapter </li><li>Internal Integrated Power MOSFETs of Charger </li><li>Support 4.35V/2.3A Factory Mode </li><li>I<sup>2</sup>C Controlled Interface </li><li>4 Current Sources with 32-Steps Current Setting </li><li>4 LDOs with Programmable Output Voltage </li><li>Thin 32-Lead WQFN Package </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT8966H Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Cellular Phone </li><li>Smart Handheld Device </li></ul></div>
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