NCP1253ASN100T1G

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PMIC - AC DC Converters, Offline Switchers

The NCP1253ASN100T1G is a high performance offline switcher control IC in a small package, with a wide range of application fields. It is specifically designed to support minimal component designs in order to reduce cost and simplify the circuit. Its major application fields include but are not limited to: battery operated equipment, industrial power supplies, consumer & home appliances, LED lighting, and phone chargers.

The NCP1253ASN100T1G utilizes a very innovative architectural design to achieve high system efficiency of up to 92% without the need of an output capacitor. In addition, the monolithic IC device offers an adjustable output voltage range of 3.2V to 24V, a variable switching frequency from 300KHz to 750KHz, leading phase-shift technology, a low start-up current of 1mA, and adjusted by feedback voltage to maintain the output voltage at a constant level.

To further illustrate the device\'s working principle, the NCP1253ASN100T1G relies on a pulse-width modulation (PWM) technique and a leading edge modulation (LEM) architecture to transfer the energy from the source to the load. First, the power circuit will receive the input voltage, then the IC will process this through a rectifier and a multiplier stage. The multiplier stage will generate an intermediate voltage and the PWM comparator will then compare this voltage to an analogue reference voltage.

The result of PWM and LEM control is then transferred through an output stage, which uses both an internal NMOS transistor and an external MOSFET. Subsequently, the output voltage is sent to the load and a feedback voltage provides an input voltage to the eyes of the PWM to regulate the output voltage.

In conclusion, the NCP1253ASN100T1G is a type of offline switcher control IC with many application fields. It is designed to provide an Energy Star compliant power saving solution for battery operated equipment, industrial power supplies, consumer & home appliances, LED lighting and phone chargers. The device is able to perform an adjustable output voltage, a variable switching frequency, leading phase-shift technology, a low start-up current, and adjusted by feedback voltage to maintain the output voltage at a constant level.

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