NCP1612A3DR2G Integrated Circuits (ICs)

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Power Factor Correction (PFC) is a technology used to improve the efficiency of power conversion by increasing the power factor, which is defined as the ratio between the AC voltage and the AC current of the load. PFC has grown in importance over the years as power demands have increased, due to the increasing applications of AC to DC power converters, such as uninterruptible power supplies, computer systems, telecommunications, and motor control systems. The NCP1612A3DR2G is a commercial, off-the-shelf IC specifically designed to provide active Power Factor Correction (PFC).

The NCP1612A3DR2G is a peak-current-mode (PCM) PFC controller compatible with line-frequency and high-frequency switching power supplies. It offers wide input voltage range, high power factor, and low total harmonic distortion (THD) current distortion, making it an ideal solution for many power applications. The device is designed for both single-stage PFC applications, as well as two-transistor forward applications, where the PFC and output stages are combined into a single-stage converter. It offers high-performance with low component count, small size, and minimal external components.

The NCP1612A3DR2G operates in constant frequency, pulse width modulation (PWM) mode, with a fixed frequency of 55 kHz. It incorporates an internal MOSFET driver for gate drive of the external PFC MOSFET. It also includes a leading edge blanking (LEB) feature to reduce high peak drain-source voltage (VDS) spikes, which is important in high frequency switching applications. The device also supports under-voltage lockout and over-current protection, providing robust protection to the PFC circuit.

The NCP1612A3DR2G is also suitable for single-stage, half-bridge PFC circuits, especially when a high power factor and THD performance is required. It features a low-ripple clock frequency generator, which reduces switching losses and EMI, resulting in higher efficiency. The controller also provides input voltage and load sensing, enabling precise tracking of the average input voltage and load parameters, which ensures the converter is operating within the desired parameters.

The NCP1612A3DR2G is widely used in numerous consumer, industrial, and medical applications, including computer SMPS, LED lighting products, medical equipment, automotive systems, portable electronics, and renewable energy installations. The device is also suitable for other more specialized applications, such as telecom power supplies, AC to DC rectifiers, and solar power systems.

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