Description:Integrated 700 V MOSFET with RDS(on) of 4.7 Ω; Current-Mode Fixed Frequency Operation (65 & 100 kHz) - 130 kHz for B version only; Peak Current: NCP1076A/B = 650mA and NCP1077A/B = 800 mA; 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
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 copper traces wide and short to reduce thermal resistance.
To ensure reliable startup and shutdown, make sure to follow the recommended soft-start and shutdown procedures, and use a suitable input capacitor to filter out noise and voltage transients.
When selecting the output inductor, consider the inductor's saturation current, DC resistance, and core material to ensure it can handle the output current and switching frequency of the converter.
To optimize efficiency, consider the input voltage, output voltage, and output current of your application, and adjust the converter's components and operating frequency accordingly. You can also use simulation tools to model and optimize the converter's performance.
Potential sources of EMI include the switching node, output voltage, and input voltage. To mitigate EMI, use shielding, filtering, and layout techniques such as separating the switching node from sensitive circuits, using EMI filters, and minimizing loop areas.
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NCP1077BAP065G Overview
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