NCP1070STAT3G

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PMIC – AC DC Converters and Offline Switchers

The NCP1070ST33G is an off-line switching power controller design aimed at cost-conscious consumers. It is a cost-effective solution for intelligent Secondary side AC-DC switching power supplies. It is designed mainly to be used as Product Processors and End-Stages, integrated with a controller and rectifier. This application field enables designers to quickly and cost-effectively develop power supplies with wide range of wattages and source voltage.

NCP1070ST33G provides seamless transition from active power conversion to standby power consumption, by having adjustable hysteresis on its internal main comparator. It offers low side main switch voltage and current protection and including integrated voltage regulators for both input and output accuracy. Thanks to its built-in high efficiency power MOSFET driver and controlled slope, turn-off slew rate, electromagnetic interference and acoustic noise is decreased to the standards which are required for energy efficient power supplies.

In terms of its working principle, the NCP1070ST33G is based on flyback power conversion, which encompasses a simple, one-transistor forward converter with a switches output voltage feedback, called slope compensation. The switching function is enabled by a startup phase, during which the MOSFET is always on. When the regulator senses that the secondary side voltage is within regulation tolerance, the bias voltage is enabled and the voltage regulation loop is activated. In order to control the peak current through the primary winding, a control circuit is included to control the bias voltage of the power MOSFET.

To summarize, the NCP1070ST33G is an off-line switching power controller design primarily aimed at cost-conscious consumers. It features adjustable hysteresis, low side main switch voltage and current protection and integrated voltage regulation mechanisms. When it comes to its working principle, the NCP1070ST33G is based on flyback power conversion with its switching enabled by a startup phase. Thanks to its cost-effective design, this power supply is able to quickly and cost-effectively produce a range of wattages and source voltages.

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