K70A841

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K70A841 is a high-performance switching power supply controller dedicated to computer power adapter applications. It integrates high-efficiency MOSFET gate control, constant-current (CC) and constant-voltage (CV) control, digital power supply control, and on-board high-efficiency MLCC capacitors, requiring no external MOSFETs or optocouplers. K70A841 provides an instantaneous response to current and voltage change. The device also features a single-chip complete auto-restart function and comprehensive protective functions.

K70A841 is suitable for a variety of low-power, high-efficiency, cost-sensitive applications such as notebook adapters, PC adapters, and enterprise application adapters. It can be used to simplify the power supply design process and improve the performance of the power supply. Because the built-in MOSFET gate control and various adaptive protections can effectively reduce the design and commissioning cost of power systems.

K70A841 delivers maximum power efficiency with minimal device complexity and minimum external components. It employs an optimized feedback loop to release power control at high speed, providing fast transient response and high overall efficiency. The integrated gate driver helps achieve full load efficiency of up to 97%. In addition, due to the non-interrupted current and the quick rise time it is able to reduce the power supply\'s EMI.

K70A841’s working principle is straightforward. The power amplifier senses the primary circuit voltage while the signal amplifier senses the output power and voltage. Based on the feedback, the output power can be regulated by changing the duty cycle of the voltage pulse, the output current, and the output voltage.

The power amplifier senses the primary circuit voltage while the signal amplifier senses the output power and voltage. Based on the feedback, the output power can be regulated by changing the duty cycle of the voltage pulse, the output current, and the output voltage. As the output voltage and current changes, the duty cycle can be changed to ensure the output voltage and current remain within the designed range. In this way, the input voltage is finally converted into the output power, achieving the stability and accuracy of the output.

K70A841 is a highly integrated power supply dedicated to computing applications, with high efficiency, fast response, and flexible protection functions. Low-power, high-efficiency, cost-sensitive computer applications such as notebook adapters, PC adapters, and enterprise application adapters can take advantage of its features. K70A841 significantly simplifies the design process and improves the performance of the power supply.

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