TPS76833QDR

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TPS76833QDR Application Field and Working Principle

The TPS76833QDR from Texas Instruments is a high-powered, high-voltage linear voltage regulator designed for a range of applications, including automotive, industrial and networking applications. It is designed to be used to regulate voltages of up to 18V, and delivers a maximum current of 3A with support for both PWM and PFM switching modes.

Features

• Operates from 4V to 18V
• Output current of 3A
• Fixed and adjustable output voltage options
• Integrated overvoltage protection
• Integrated current limit protection
• Wide voltage adjustable range: 0.8V to 18V
• Internal MOSFET Switch
• Built-in PFM/PWM switching control

Typical Applications

• Automotive engine control
• Data centre power supplies
• Industrial power supplies
• Network power systems
• Satellite TV receivers
• Test and measurement equipment
• Routers and gateways
• 3G and 4G basestations

Working Principle

The TPS76833QDR linear voltage regulator operates on the principle of controlling a voltage-controlled MOSFET to draw current from an input line, and then convert it to a regulated output. This is done by varying the gate voltage of the MOSFET to achieve the desired output voltage. To switch between different output voltages, the voltage regulator can be programmed via the M3 and M4 pins.

The regulator can support both PWM and PFM switching modes, allowing it to reduce power consumption by automatically switching to PFM mode when the load is light. It also features an overvoltage protection circuit, which can be programmed via the OVDS pin, to protect the system from sudden supply changes.

There is also an integrated current-limit protection circuit, which can detect and limit excess current at the output, and an integrated thermal protection circuit, which can detect high temperatures and shutdown the device if necessary.

Conclusion

The Texas Instruments TPS76833QDR is a high-powered, high-voltage linear voltage regulator, designed for a variety of applications. It is able to regulate voltages of up to 18V, and delivers a maximum current of 3A with support for both PWM and PFM switching modes. It includes a number of features that make it suitable for automotive, industrial and networking applications, including overvoltage protection, current limit protection and an integrated MOSFET switch.

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