TPS549A20RVER

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TPS549A20RVER Application Field and Working Principle

The TPS549A20RVER is an integrated dual N-Channel MOSFET with internal drivers for high current off-line buck converter. This device includes all of the features needed for low power metering, power management and lighting applications. It is a high performance, low cost solution to meet the demands of the home and office markets. The TPS549A20RVER is ideal for use in high performance P3.3V or low voltage P5V DC/DC converters, making it optimal for power management applications in portable electronics, industrial, and medical systems.

Features of TPS549A20RVER

• Integrated dual N-channel MOSFETs
• Ultra-low quiescent current operation (<20µA)
• High efficiency (up to 97%)
• High switching frequency (2 MHz)
• Protection features include under-voltage lockout, over-current and over temperature
• Integrated soft-start circuitry
• Low control voltage range (3.3V to 5.5V)
• Selectable 0V to 3.3V or 0V to 5V output range
• Low EMI (electromagnetic interference)

Basic Working Principle of TPS549A20RVER

The TPS549A20RVER is a voltage regulator which uses a pair of N-channel MOSFETs as the main switching devices to regulate the output voltage. It works by using a pulse-width modulation (PWM) signal, generated by an on-chip voltage follower, to control the MOSFETs. At a given frequency, the PWM signal cycles between a high and a low state, allowing current to flow through the two MOSFETs during the low state, thereby increasing the output voltage. The amount of power transferred to the output depends on the duty cycle of the PWM signal, with higher duty cycles resulting in higher output voltages. The output voltage can be adjusted by adjusting the input voltage and the duty cycle of the PWM signal.

The TPS549A20RVER also includes a power stage, consisting of an inductor and a capacitor, to regulate the output voltage. The inductor stores energy while the switch is in the low state, while the capacitor acts as a filter to reduce the ripple in the output voltage. The voltage regulator also includes over-current, over-temperature, and under-voltage protection features, as well as a soft-start feature to reduce the in-rush current during start-up.

Applications of TPS549A20RVER

The TPS549A20RVER is well suited for applications that require low power metering, power management, and lighting systems. It is ideal for use in high performance P3.3V or low voltage P5V DC/DC converters, making it optimal for power management applications in portable electronics. It is also suitable for industrial and medical systems, as well as for high efficiency power supplies. The TPS549A20RVER is also a great choice for applications that require protection features such as over-current and over-temperature protection, as well as for applications that require soft-start circuitry for reducing in-rush current.

Conclusion

The TPS549A20RVER is an integrated dual N-Channel MOSFET with internal drivers for high current off-line buck converters. It is an ideal solution for low power metering, power management, and lighting applications. The integrated protection features, such as over-current, over-temperature, and under-voltage protection ensure reliable protection and operation while the soft-start circuits reduce in-rush current at start-up. The TPS549A20RVER is well suited for portable electronics, industrial, and medical systems applications.

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