L4963W

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DC-DC switching regulators are often used for power solutions across a wide range of applications from industrial, automotive, to consumer electronics. The L4963W is a high-performance driver for N-Channel MOSFETs, logic compatible and specifically designed for Flyback topologies up to 6A in a miniature TSOP-6 package. In this article, we will explore the application field and working principle of the L4963W.

Application Field of L4963W

The L4963W is an integrated DC-DC switching regulator designed for flyback converters. It is ideal for use in an adaptor or a charger for small to medium power applications. Thanks to its wide range of features, the L4963W is suitable for a variety of applications, such as industrial, automotive, and consumer electronics. It is also perfectly suited for a wide range of up to 6A applications, allowing for low cost implementation of a complete flyback converter.

Moreover, the L4963W’s wide input voltage range from 9V-14V makes it well suited for powering EN 55032 Class A compliant LED lighting, low power AC-DC adapter, and power supplies. Its adjustable switching frequency up to 400 kHz make it suitable for high efficiency, low noise and low EMI operation with minimal external components. The device’s shutdown mode minimizes the power consumption in idle mode, and its programmable current limiting is also ideal for protecting the power supplies.

Working Principle of L4963W

The L4963W includes a low on-resistance, logic compatible power MOSFET driver, required for a complete flyback converter. The device is configured to operate as a totem-pole PWM driver, and can switch power MOSFETs up to 6A with a peak voltage of 30V. The device will keep the output voltage in regulation by controlling the switching of the power MOSFETs through intelligent control, as this ensures minimal switching losses and helps optimize system efficiency.

To maximize efficiency, the user can adjust the programmable oscillator frequency from 10KHz to 400KHz. Furthermore, the device can also monitor several key parameters of the flyback converter such as output voltage, output current, and input voltage. The device can then adjust the switching frequency and duty cycle according to the information derived from the real-time monitoring.

The protection features of the L4963W are essential for providing robust operation of the flyback converter. These include cycle-by-cycle current limiting, adjustable soft-start, overvoltage protection, and thermal shutdown. This ensures that the system remains operational as long as the parameters remain within the safety envelope.

Conclusion

The L4963W is an integrated DC-DC switching regulator, specifically designed for flyback topologies up to 6A. Thanks to its wide range of features, including adjustable frequency and adjustable soft-start, it is suitable for a variety of applications including industrial, automotive, and consumer electronics. In addition, its built-in protection features ensure robust operation and long life for the device. As such, the L4963W is a powerful integrated solution for powering EN 55032 Class A compliant LED lighting, low power AC-DC adapter, and power supplies.

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