NCP1443FR4

The NCP1443FR4 device is a high performance, current mode, three-terminal switching regulator, which can be used for both DC-DC conversion and PFC applications. The device offers a peak current mode control using voltage mode compensation. In addition, the NCP1443FR4 provides an adjustable level of internal compensator and adjustable limits for peak current and peak current slew rate.

Application Field

The NCP1443FR4 device is suitable for a wide range of applications, such as adjustable dc-dc converters, SMPS, power supplies, off-line adapters and power factor correction (PFC) circuits with single-ended and multiple outputs. The internal peak current limits can be used to protect the power stage from over-current damage and make sure that the system won\'t be shut down to prevent irreversible damage. By adjusting the limits of peak current and slew rate, the power stage is robust and reliable for various loads. The NCP1443FR4 also allows for easy optimization of the loop stability for each application.

Working Principle

The NCP1443FR4 device provides current mode regulation which is implemented by means of an internal error amplifier and a temperature-compensated ramp generator. This type of control offers faster response, high stability and low output ripple. By controlling the duty cycle, the peak current regulation is triggered when the most positive peak of the coil current reaches the threshold. The current limit also keeps the output voltage on the desired voltage level. The NCP1443FR4 also provides fixed under-voltage lockout (UVLO) detect trip point, short-circuit protection (SCP) function, and cycle-by-cycle current limit.

Conclusion

The NCP1443FR4 is a high performance, three-terminal switching regulator which provides peak current mode control with voltage mode compensation. It is suitable for a wide range of applications, including adjustable DC-DC converters, SMPS, power supplies, off-line adapters, and power factor correction circuits. The NCP1443FR4 provides protection features such as UVLO detect trip point, SCP function, and current limit. In addition, easy loop optimization is possible due to adjustable peak current and peak current slew rate limits.