TPS51427ARHBT

TPS51427ARHBT Application Field and Working Principle

The TPS51427ARHBT controller is a high-efficiency, monolithic synchronous buck regulator that provides voltage regulators for special purposes. It includes an internal low-side MOSFET and bootstrap diode, and operates from an input voltage range of 4.5V to 18V and output voltage range of 0.8V to 5V. It also offers a wide range of output current capability from 0.5A up to 4.5A.

The major application of the TPS51427ARHBT is cellular phone chargers and other converters. It is a highly integrated and cost effective solution, making it suitable for many other applications such as automotive and industrial, notebook adapter, and wireless base-station hot-swap circuits. It is believed to provide high-performance power management solutions where low noise and high efficiency are essential.

Operating Modes

The TPS51427ARHBT offers a wide range of operating modes. It\'s able to control its output voltage using either Pulse-Width Modulation (PWM) mode or Pulse-Frequency Modulation (PFM) mode. In PWM mode, the PWM controller is used to generate the switching signal. This signal is fed to the gate of the internal MOSFET, generating a PWM signal. The PWM control signal then regulates the output voltage by switching the MOSFET ON and OFF, while the PFM mode operates at a constant frequency. The frequency depends on the output impedance, input impedance and the output voltage.

Protection Features

The TPS51427ARHBT comes with a host of protection features to keep your system safe. It includes an over-voltage protection that monitors the output voltage and shuts down the converter if the output voltage exceeds the programmed limit. It also features a short-circuit protection, which will detect any current surge in the output and disable the converter to protect it from damage. Additionally, it has an over-temperature protection, which will shut down the converter to prevent any damage that might be caused by excessive heat.

Key Benefits

• Wide input voltage range of 4.5 V to 18 V
• Wide output voltage range of 0.8 V to 5 V
• High efficiency
• Up to 4.5 A output current capability
• Integrated low-side MOSFET and bootstrap diode
• Operates in either Pulse-Width Modulation (PWM) or Pulse-Frequency Modulation (PFM) mode
• Over-voltage, short-circuit and over-temperature protection