NCP1027P065G

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NCP1027P065G is an off-line switcher from ON Semiconductor, specifically designed for use in flyback type AC-DC converter applications. It is a member of the NCP10x7 family of integrated controller, driver and MOSFET components. The device requires minimal external components, achieving high efficiency levels, long utilization life and improved operation safety.

The application field for NCP1027P065G includes but is not limited to, applications such as: isolated power supplies, isolated DC/DC converters, AC/DC adaptors with USB, desktop and notebook computer AC/DC supplies, TV sets, BR/DVD players and other mobile devices.

The working principle of the NCP1027P065G is as follows:

The NCP1027P065G consists of a primary side control IC plus an integrated gate driver and power MOSFET. The primary side device detects the input voltage, regulates the gate voltage applied to the MOSFET in order to maintain the output current at constant level. External resistor-based resistors are used for current limiting and compensation.

The device can operate in pulsed-mode or PWM-mode, and also provides several protection functions like output overvoltage protection, current limit protection, short-circuit protection, thermal shutdown protection and input overvoltage protection. It also regulation for feedback control for current mode applications.

For overvoltage protection, an LBO (Overvoltage protection switch) is included in the NCP1027P065G. It is used to measure the output voltage and if the voltage exceeds the rated threshold, the LBO opens and cuts off the primary stage, thus preventing destructive events such as arc discharges.

The NCP1027P065G is designed to operate between a wide input voltage range (up to 550V) and a maximum output power of 6.5W. It has an efficiency of up to 92%. The device offers primary side regulation (PSR), secondary side control (SSC) and interleaved integrated control (IIC) functionality.

The NCP1027P065G is packaged in a 14-pin SOT-8 package and has a junction temperature range from -30 to 125 degrees Celsius. It has a maximum operating temperature of 75 degrees Celsius and has a maximum operating voltage of 7V.

The device integrates an LDO for auxiliary power supply and can be shutdown via logic control. It also has a double pulse suppression and is designed to meet RoHS certification. In addition, it is suitable for 300V isolation international standards.

In conclusion, the NCP1027P065G is an efficient, single-channel flyback controller and driver combo, suitable for a wide range of applications including power supplies, AC/DC adaptors, mobile device and IT equipment.

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