L9949TR

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The evolution of the integrated circuit has enabled unprecedented levels of control to be exercised over power supply systems. Today, components such as the L9949TR can be used to achieve incredibly precise manipulation of an electronic system’s power. In practice, the L9949TR achieves effectiveness in both monitoring and regulation of a wide range of parameters.

L9949TR Applications

The L9949TR is a 3-phase synchronous buck converter controller which has been designed for use in motor control and power conversion applications. It features a low on-resistance low-side switch and is capable of supporting a wide input voltage range (4.5V to 20V). It is a 3+2 Phase controller and is offered in a SOIC-20 package. The device features timer-based independent dual-phase PWM control of the high- and low-side switches and a synchronous rectification stage, which allows it to support both current-mode and voltage-mode control.

The L9949TR also provides a programmable frequency range and supports both voltage-mode and current-mode operation. Additionally, it offers adjustable sync signals and can adjust the output voltage based on the input and output voltages. The device also provides a variety of safety protection features, such as over-current protection (OCP), over-voltage protection (OVP), and over-temperature protection (OTP) to ensure the safety and reliability of the system.

L9949TR Working Principle

The L9949TR is a synchronous buck converter controller which can be used to efficiently convert a higher DC voltage to a lower DC voltage. This is achieved by connecting an inductor, a capacitor, and two switches – a high-side switch and a low-side switch – between the input voltage and the output voltage. These switches are opened and closed in a controlled manner to allow current to flow from the input to the output, thus resulting in the conversion of power.

The L9949TR can control the switching frequency, current sense voltage, and the peak current. It also supports two modes of operation- voltage-mode and current-mode operation. In voltage-mode operation, the output voltage is maintained at the desired level by varying the duty cycle, whereas in current-mode operation, the load current is maintained at the desired level by varying the duty cycle.

The device features an adjustable period timer to set the on and off time of the PWM signal so as to maintain the output voltage or current. The device also features a built-in voltage regulator and a digital-to-analog converter (DAC) to control the output voltage and the current limits, respectively. Moreover, the device also features an advanced sleep mode which can reduce the system’s overall power consumption.

Conclusion

The L9949TR is a powerful and versatile 3+2 Phase synchronous buck converter controller with a wide input voltage range (4.5V to 20V). It is capable of controlling both current-mode and voltage-mode operation and offers adjustable sync signals, timer-based independent dual-phase PWM control of the high- and low-side switches, programmable frequency range, adjustable sleep mode, and a variety of safety protection features. The L9949TR is capable of accurately converting and regulating DC voltage, which makes it an essential component in motor control and power conversion applications.

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