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RT9554A Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9554A Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 10 page  RT9554A ® © Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS9554A-00 June 2014 www.richtek.com 1 Applications Notebooks Battery Output Current Sense Protection IC Simplified Application Circuit Marking Information Pin Configurations (TOP VIEW) WDFN-8L 2x2 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. RT9554A Package Type QW : WDFN-8L 2x2 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) 2CW 2C : Product Code W : Date Code General Description The RT9554A is designed for over-current detection. The current sense amplifier amplifies the voltage across resistor which is connected between CSP and CSN by 200. The amplified voltage is compared with the voltage of BAT_REF and check whether over-current happens or not. The RT9554A also provides a comparator with two input pins, AC_REAL and AC_REF for users. There is an output pin FLAG as an indicator which is a N-MOSFET in open-drain configuration. Users can connect one resistor between the FLAG pin and supply voltage. Either over-current condition occurs or the AC_REAL voltage is larger than the AC_REF voltage, the FLAG is pulled low. The RT9554A is a available in the WDFN-8L 2x2 package. Features Common Mode Input Range up to 24V VCC Operating Current : 200 μA VCC Shutdown Current : 5 μμμμμA (under S3/S4/S5) Programmable Over-Current Level FLAG Signal goes Low when OCP RoHS Compliant and Halogen Free CSN RT9554A CSP Output Input VCC EN BAT_REF RSENSE 5V 0V FLAG 1.05V AC_REAL AC_REF 3.3V VCC AC_REF EN CSP CSN BAT_REF AC_REAL 7 6 5 1 2 3 4 8 9 FLAG |
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