Description:Integrated 700 V MOSFET with RDS(on) of 2.7 Ω; Current-Mode Fixed Frequency Operation (65 & 100 kHz) - 130 kHz for B version only; Peak Current: NCP1079A/B = 1,050mA; Skip-Cycle Operation at Low Peak Current; Dynamic Self-Supply (DSS); Auto-Recovery Output Short Circuit Protection with Timer-Based Detection; Frequency Foldback Operation; 300 µA No Load Power Consumption; Frequency Jittering (including during frequency foldback mode); Adjustable Brown-out Protection and OVP; Over Power Protection; 2nd Level
A good PCB layout for optimal thermal performance involves placing the device near a thermal pad or a heat sink, using thermal vias to dissipate heat, and keeping the surrounding area clear of other components. A 4-layer PCB with a dedicated thermal layer is also recommended.
To ensure reliable startup and shutdown, make sure to follow the recommended soft-start and shutdown procedures outlined in the datasheet. Additionally, ensure that the input voltage is within the specified range and that the output capacitor is properly sized to handle the inrush current.
The maximum allowed input voltage ripple for the NCP1079BAP100G is typically around 10% of the nominal input voltage. Exceeding this limit may affect the converter's stability and reliability.
While it is possible to use a different inductor value or type, it is not recommended as it may affect the converter's performance, efficiency, and stability. The recommended inductor value and type are carefully selected to ensure optimal performance and should be used whenever possible.
To troubleshoot issues with the output voltage regulation, start by checking the input voltage, output voltage, and output current. Verify that the feedback resistors are properly connected and that the output capacitor is properly sized. Also, check for any signs of overheating or component failure.
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NCP1079BAP100G Overview
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