NCP1070P100G

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The NCP1070P100G is a 100mA high performance, output voltage adjustable current mode controller specifically designed for offline flyback topologies. The device incorporates a number of features targeted at improving system performance and reducing system cost. The NCP1070P100G provides a cost effective solution that is suitable for a wide range of applications such as lighting, standby and auxiliary power supplies.

The NCP1070P100G is a PMIC - AC DC Converters and Offline Switchers that is designed to reduce system cost and improve system performance. Its main features include a wide switching frequency range, low start up current, current-mode control topology, and frequency jittering circuitry. This device also provides continuous mode, burst mode, skip cycle, and hiccup protection for a wide range of power applications, including off-line and portable consumer electronic applications.

The NCP1070P100G controller utilizes current-mode control to ensure current limit and stable loop response in the presence of line and load perturbations. An external resistor sets the current limit level and an external capacitor sets the loop response time. Frequency jittering helps to reduce the radiated EMI of the power supply. All operating functions (input voltage regulation, hiccup protection and so on) are realized by the single NCP1070P100G controller.

In terms of performance, the device works well under low line/load perturbations and ensures system accuracy and uniformity. The NCP1070P100G has a wide operating frequency range of 40kHz to 500kHz, enabling efficient design of a wide range of power supplies. The low start-up current of 0.6μA reduces the number of external components required in the design and eliminates the need for an additional capacitor across Vcc and GND.

The device also provides various protection features such as lead-frame over-temperature protection, open loop protection, and hiccup protection that make the NCP1070P100G suitable for various design options. The lead-frame over-temperature protection is monitored by an on-chip temperature sensor. The hiccup protection is activated using an external resistor and capacitor. The device senses the output voltage and if it detects an over-voltage at the output, it will shut down and retry the start-up cycle if the over-voltage conditions have been cleared.

The NCP1070P100G is a versatile, cost-effective solution for a wide range of power applications from standby power supplies to lighting systems. Its robust current mode architecture ensures accurate and uniform response to various load conditions. Its design features guarantee safety and system efficiency. Its features such as frequency jittering, low start-up current, and over-voltage protection make the NCP1070P100G an ideal solution for offline flyback topologies.

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