NCP1217D133R2

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PMIC stands for power management integrated circuits, which are designed to make the process of regulating power much more efficient. They improve power conversion, provide over-current protection, and reduce the size and cost of the power supply components. One type of PMIC is a DC-DC converter, which is used to convert electricity from a high-voltage direct current (DC) to another type of lower-voltage DC. The NCP1217D133R2 is a DC-DC converter in the Offline Switchers category specifically designed for applications that require isolation between the input and output voltages. This article will explain the applications and working principles of the NCP1217D133R2.

The NCP1217D133R2 is an offline switcher that is specifically designed for isolated ac-dc conversion. The NCP1217D133R2 is an off-line high voltage flyback DC-DC converter that provides primary-side control. It is ideal for applications such as bulk power supply, ac-dc SMPS, off-line LED drivers, and energy harvesting DC-DC converters. The isolation voltage of the device is up to 2.5kV with high efficiency, low quiescent current, robust protection, and industry leading EMI.

The NCP1217D133R2 has a wide range of input voltages and can convert an input voltage range of 90VAC‐265VAC to an output voltage of 3.3V to 12V. The device has a minimum efficiency of 85%, a minimum output power of 25W and a maximum output power of 150W. It also provides a range of popular protection features, including over-voltage protection (OVP), over-current protection (OCP) and in-rush current protection.

The working principle of the NCP1217D133R2 is based on a flyback topology. The primary side of the device consists of a half-bridge rectifier, a filter, and a transformer. A PWM control scheme is used to generate the output voltage. The transformer, in combination with the primary control, controls the output voltage. The output of the primary rectifier is filtered to get the DC supply voltage for the PWM controller. The transformer is also an inductor and its voltage is tapped by the secondary rectifier. The tapped winding is rectified, filtered, and regulated to get the required output voltage. In addition to the PWM controller and filter, the device also has a number of protection circuits to help protect against over-current, over-voltage, and in-rush currents.

In conclusion, the NCP1217D133R2 is an offline switcher specifically designed for isolated ac-dc conversion. It has a wide range of input voltages and can convert an input voltage range of 90VAC‐265VAC to an output voltage of 3.3V to 12V. The device has a minimum efficiency of 85%, a minimum output power of 25W and a maximum output power of 150W. It also provides a range of popular protection features. The working principle of the NCP1217D133R2 is based on a flyback topology. The device is suitable for applications such as bulk power supply, ac-dc SMPS, off-line LED drivers, and energy harvesting DC-DC converters.

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