Description:Internal rugged 2.25 Ω Typ.RDS(on) 800 V MOSFET and Built-in HV current source for start up; mWSaverTM Technology and Frequency Foldback; Fsw options: 65/100/130 kHz; Line compensation for constant maximum over load limiting; Brown In/Out Protection & Line Over Voltage Protection; Various Protections • VDD Over Voltage Protection (VDD-OVP) • Over Load Protection (OLP) • Current Sensing Resistor Short Protection (CSSP) • Abnormal Over Current Protection (AOCP) • Thermal Shutdown Protection (TSD) • VDD Under-
The recommended PCB layout for optimal thermal performance involves placing the device on a 2-layer or 4-layer board with a solid ground plane on the bottom layer, and using thermal vias to connect the exposed pad to the ground plane. Additionally, keeping the copper traces wide and short can help reduce thermal resistance.
To ensure reliable startup of the NCP11184A130PG in a high-noise environment, it is recommended to use a bypass capacitor (e.g. 10uF) between the VIN pin and GND, and to add a noise filter (e.g. RC filter) on the EN pin. Additionally, using a slow-rising input voltage (e.g. 10ms) can help prevent false triggering.
The maximum allowed voltage on the EN pin is 6V, which is the absolute maximum rating. However, it is recommended to keep the voltage on the EN pin below 5.5V to ensure reliable operation.
The NCP11184A130PG is rated for operation up to 150°C, but it is recommended to derate the output current and input voltage at high temperatures to ensure reliable operation. Additionally, the device should be mounted on a heat sink or a PCB with good thermal conductivity to prevent overheating.
To troubleshoot issues with the device not turning on or not regulating the output voltage, check the input voltage, EN pin voltage, and output voltage with an oscilloscope or multimeter. Verify that the input voltage is within the recommended range, the EN pin is properly biased, and the output voltage is within the expected range. Also, check for any signs of overheating or damage to the device.
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NCP11184A130PG Overview
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