Description:Peak current mode control; Adjustable switching frequency; Latched primary overcurrent protection with 10 ms fixed delay; Adjustable soft start timer; Auto recovery brown out detection; Extended Vcc range up to 28 V with auto recovery UVLO; Internal 160 ns leading edge blanking; Frequency jittering; Adjustable internal ramp compensation ; +500 mA / -800 mA Source/Sink current driver capability; Skip cycle operation in light/no load operation; SOIC-8 package
A good PCB layout for the NCP1252BDR2G should include a solid ground plane, short and direct traces for the input and output pins, and a decoupling capacitor (e.g., 10uF) between the VIN and GND pins. Additionally, the layout should minimize electromagnetic interference (EMI) and ensure good thermal dissipation.
The input capacitor should be chosen based on the input voltage ripple requirement, output voltage, and the maximum input current. A general guideline is to use a capacitor with a capacitance value between 1uF to 10uF, and a voltage rating that is at least 1.5 times the maximum input voltage. X5R or X7R ceramic capacitors are good options.
The maximum ambient temperature for the NCP1252BDR2G is 85°C. However, the device can operate up to 150°C junction temperature. It's essential to ensure good thermal dissipation and consider the thermal derating curves in the datasheet to ensure reliable operation.
Yes, the NCP1252BDR2G is suitable for high-reliability applications. It's manufactured using a robust process, and onsemi provides a comprehensive set of reliability data, including FIT rates and MTBF calculations, to support high-reliability designs.
To ensure EMC, follow good PCB layout practices, use a shielded enclosure, and consider adding EMI filters or common-mode chokes to the input and output lines. Additionally, ensure that the device is properly decoupled, and the input and output cables are properly shielded and terminated.
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NCP1252BDR2G Overview
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