NCP1937A2DR2G

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Power Factor Correction (PFC) devices are essential power converter components that help manage current and voltage sources of electricity. The NCP1937A2DR2G is a high-performance Power Factor Correction (PFC) controller designed for offline applications with valley current mode control. It consists of a controller, an oscillator, an error amplifier, a gated turn-on circuit and a voltage regulator.

The controller comprises of dual N-type self-protection MOSFETs, making it suitable for a wide range of applications. It is also capable of controlling PFC in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) during light load and dynamic load conditions respectively. This helps reduce the size of the PFC coil and boost the total efficiency of the circuit.

Applications of the NCP1937A2DR2G includes battery charging and UPS circuits. It can also be used in power supplies ranging from 4 to 6 kW, AC/DC converters, renewable energy, computing applications, motor speed controls, motor drives, LCD, LED and other lighting solutions.

The working principle of the NCP1937A2DR2G is based on the continuous conduction mode (CCM) of operation. In CCM, the circuit is able to provide accurate output voltage by maintaining the conduction angle unaltered over the entire power range. This allows the device to achieve a high power factor over the entire range. During light load and dynamic load conditions, the device automatically switches over to discontinuous conduction mode (DCM) for enhanced efficiency.

The device also has advanced features for controlling voltage ripple, line transients and EMI, thus providing robust performance. In addition, it has short circuit protection, over temperature protection and differential input voltage protection to ensure maximum reliability. The low start-up current, low supply current and low standby loss further reduce overall system cost and improve the overall efficiency of the application.

The NCP1937A2DR2G is an ideal choice for Power Factor Correction (PFC) controllers, given its wide range of application, high efficiency and robust performance. With its advanced features, the device is well-suited for various offline applications. It can also be used in various power supplies, AC/DC converters, computing and lighting solutions, offering superior power factor correction results.

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