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AP3403 Datasheet(PDF) 7 Page - Diodes Incorporated |
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AP3403 Datasheet(HTML) 7 Page - Diodes Incorporated |
7 / 9 page AP3403 Document number: DS36839 Rev. 3 - 2 7 of 9 www.diodes.com May 2015 © Diodes Incorporated AP3403 A Product Line of Diodes Incorporated Application Information Please refer to the Typical Applications Circuit, and to set the circuit parameters please refer to the following descriptions. Under Voltage Lockout (UVLO) Circuit When the VIN drops lower than the UVLO detector threshold, the UVLO circuit starts to operate, VREF stops, and high-side switch and low-side switch built- in switch transistors turn “OFF”. As a result, VOUT drops according to the COUT capacitance value and the load. When the VIN is rising higher than UVLO released voltage, the IC will restart the operation. Short Circuit Protection and Recovery When the AP3403 output node is shorted to GND, as VFB drops under 0.3V, the chip will enter hiccup mode to protect itself, when short circuit is removed, and VFB rises over 0.4V, the AP3403 recovers to normal operation again. If the AP3403 reaches OCP threshold while short circuit, the AP3403 will enter cycle by cycle current limit mode until the current under OCP threshold. Input Over Voltage Protection When input voltage of AP3403 is near 6.25V, the IC will enter Input-Over-Voltage-Protection. It would be shut down and there will be no output voltage in this state. As the input voltage goes down below 6V, it will leave input OVP and recover the output voltage. Over Temperature Protection The internal thermal temperature protection circuitry is provided to protect the integrated circuit in the event that the maximum junction temperature is exceeded. When the junction temperature exceeds +140ºC, it shuts down the internal control circuit and switching power MOSFET. The AP3403 will restart automatically under the control of soft start circuit when the junction temperature decreases to +100ºC. Ordering Information AP3403 FLJ - 7 Packing Package 7 : Tape & Reel FLJ : U-DFN1616-6 Part Number Package Code Packaging 7” Tape and Reel Quantity Part Number Suffix AP3403FLJ-7 FLJ U-DFN1616-6 3000/Tape & Reel -7 Marking Information U-DFN1616-6 (Type G) (Top View) XX Y : Year : 0~9 X : Internal Code XX : Identification Code W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week Y W X Part Number Package Identification Code AP3403FLJ-7 U-DFN1616-6 DE |
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