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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 <span class="overline">FLAG</span> as an indicator which is a N-MOSFET in open-drain configuration. Users can connect one resistor between the <span class="overline">FLAG</span> pin and supply voltage. Either over-current condition occurs or the AC_REAL voltage is larger than the AC_REF voltage, the <span class="overline">FLAG</span> is pulled low. The RT9554A is a available in the WDFN-8L 2x2 package.
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<li class="mv5"> Common Mode Input Range up to 24V <br /></li><li class="mv5"> VCC Operating Current : 200μA<br /></li><li class="mv5"> VCC Shutdown Current : 5μA (under S3/S4/S5)<br /></li><li class="mv5"> Programmable Over-Current Level<br /></li><li class="mv5"> <span class="overline">FLAG</span> Signal goes Low when OCP<br /></li><li class="mv5"> RoHS Compliant and Halogen Free</li>
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Keyword 1

Keyword 2

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