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RT9718 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9718 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 10 page  RT9718 1 DS9718-02 May 2011 www.richtek.com Applications Cellular Phones Digital Cameras PDAs and Smart Phones Portable Instruments Ordering Information Note : Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Pin Configurations (TOP VIEW) WDFN-8L 2x2 General Description The RT9718 is an integrated circuit optimized to protect low voltage system from abnormal high input voltage (up to 28V). The IC monitors the input voltage, battery voltage and the charging current to make sure all three parameters are operated in normal range. When the input voltage exceeds a certain OVP threshold voltage level, the IC will turn off the power MOSFET within 1 μs to remove the power before any damage occurs. The RT9718 also can provide a voltage output without the existence of battery. The current in the power MOSFET is also limited to prevent charging the battery with an excessive current. The current limit can be programmed by an external resistor between ILIM and GND. The OCP function also has a 4-bit binary counter that accumulates during an OCP event. When the total count reaches consecutive 16 times, the power MOSFET is turned off permanently unless the input power is recycled. The IC also monitors the battery voltage, Once the battery voltage exceeds 4.35V and last for more then 180us blinking time, the RT9718 will turn off the MOSFET. The internal logic control will turn off the power MOSFET permanently when the battery over-voltage event occurs for consecutive 16 times. Features Fully Integrated Protection Function Programmable OCP Input OVP Battery OVP Withstand High Input Voltage Up to 28V Over Voltage Turn Off Time Less Than 1us High Accuracy Protection Thresholds Over Temperature Protection High Immunity of False Triggering Under Transients Warning Indication Output Enable Input Thermal Enhanced WDFN Package RoHS Compliant and Halogen Free VIN GND VOUT ILIM VB NC WRN 7 6 5 1 2 3 4 8 9 EN Over Voltage Protection IC RT9718 Package Type QW : WDFN-8L 2x2 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Z : ECO (Ecological Element with Halogen Free and Pb free) OVP A : 6.80V B : 5.85V C : 6.25V D : 7.20V Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. |
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