NCP1053ST44T3

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The NCP1053ST44T3 is an integrated pulse-width modulation (PWM) controller with a single-ended floating current sense designed for low-power offline AC-DC switch mode power supplies (SMPS). It is used in applications such as LED lighting, Linear LED lighting, LED home lighting, LED automotive lighting, LED commercial lighting, LED telecom lighting and LED industrial lighting. This device provides significant features for designers including a high-frequency control loop current regulation, adjustable pulse-width modulation frequency up to 1 MHz, programmable peak switch current limit, line under/over voltage protection, minimum on/off time limit, and a unique programmable hysteretis feature. The NCP1053ST44T3 implements a highly integrated single-ended floating current sense architecture with a single-ended PWM control. The floating current sense topology provides a simple and cost-effective solution for low-power AC-DC offline applications. It supports full active current mode control for a wide range of input voltage, output voltage and load conditions. Additionally, this device can be used in flyback topology for cost-effective solutions.The working principle of the NCP1053ST44T3 is relatively simple. The device uses an analog-to-digital converter (ADC) to monitor an analog signal that represents the switch controller\'s output voltage. This signal is compared against a digitally programmable target voltage set-point, and the PWM pulse width is adjusted so that the comparison voltage is kept as close to the target as possible.In addition, the NCP1053ST44T3 includes an input voltage-monitoring function that monitors the input voltage, detects an under-voltage condition, and provides a reset-output signal for the system protection. It also features a shut-down (SD) input for systems with a low standby or power-saving mode. The device also includes an output voltage-monitoring function, which monitors the output voltage, regulates the peak switch current to whatever value is programmed, and provides protection for the system in case of line over-voltages.Overall, the NCP1053ST44T3 is a highly integrated single-ended floating current sense controller with a single-ended PWM control suitable for low-power AC-DC offline applications such as LED lighting, linear LED lighting, LED home lighting, LED automotive lighting, LED commercial lighting, LED telecom lighting and LED industrial lighting. It offers significant features, such as a high-frequency control loop current regulation, adjustable pulse-width modulation frequency up to 1 MHz, programmable peak switch current limit, line under/over voltage protection, minimum on/off time limit, and a unique programmable hysteretis feature, which make it a good choice for designers looking for efficient power solutions.

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