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APE8903C Datasheet(PDF) 6 Page - Advanced Power Electronics Corp. |
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APE8903C Datasheet(HTML) 6 Page - Advanced Power Electronics Corp. |
6 / 9 page Advanced Power Electronics Corp. APE8903C FUNCTION DESCRIPTION Current-Limit Thermal Shutdown APPLICATION INFORMATION Capacitor Selection 6 A thermal shutdown circuit limits the junction temperature of APE8903C. When the junction temperature exceeds +160°C, a thermal sensor turns off the output NMOS, allowing the device to cool down. The regulator regulates the output again through initiation of a new soft-start cycle after the junction temperature cools by 40 ° C, resulting in a pulsed output during continuous thermal overload conditions. The thermal shutdown designed. Normally, use a MLCC capacitor on the input and output of the APE8903C. Larger input capacitor values provide better supply-noise rejection and transient response. A higher- value output capacitor may be necessary if large, fast transients are anticipated and the device is located several inches from the power source. The X5R and X7R type in MLCC is recommended. For aluminum electrolytic capacitor application, 100uF in input capacitor and 220uF in output capacitor (30m Ω < ESR < 200m Ω ) are recommended. Output capacitor of larger capacitance can reduce noise and improve load transient response, stability, and PSRR. The APE8903C monitors the current via the output NMOS and limits the maximum current to prevent load and APE8903C from damages during overload or short circuit conditions. . |
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