NCP1271P100G

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The NCP1271P100G can be classified PMIC - AC DC Converters, Offline Switchers. This integrated circuit is intended for minimum component SMPSs in low power applications such as power adapter, LED lighting and off-line auxiliary supplies.

The NCP1271P100G device is a single-chip, minimum component count offline switcher. It includes a PWM controller, an over-current protection circuit, a fixed off-time, low-side driver and a loss-less current sense circuit.

The NCP1271P100G can be used in any application where a wide input voltage range is available and where high efficiency and low standby power is needed. It is optimized for low power applications.

The NCP1271P100G includes a high-voltage start-up circuit which enables the device to start directly from an unregulated DC power supply. Once the device has started, it maintains the output voltage regulation even when the input voltage is changed by a wide margin.

The NCP1271P100G offers two operating modes: Constant Frequency voltage mode (CFVM) and variable frequency current mode (VFCM). In the CFVM mode, the device uses fixed frequency, high-side and low-side current sense to generate the output voltage. In the VFCM mode, the device uses variable frequency, current fed drive to generate the output voltage.

The NCP1271P100G includes unique features like external soft-start, a frequency foldback mechanism, a non-dissipative shut-down circuit, a Diode Emulation Mode (DEM) and a Burst Mode (BM) to reduce the switching losses and minimize the heat sink requirement.

The NCP1271P100G also provides frequency-jittering, leading-edge blanking, high frequency burst mode, output current limit and adjustable soft-start, making it suitable for high-efficiency applications. Additionally, it offers comprehensive protection features like brown-out protection, over voltage protection and short-circuit protection.

The NCP1271P100G is ideal for low power applications like power adapter, LED lighting, off-line auxiliary supplies, etc. Using this device, designers can achieve high efficiency, low component count and low power consumption.

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