TPS3780DDBVR

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The TPS3780DDBVR, manufactured by Texas Instruments Incorporated, is a power supervision device used primarily to monitor and protect against a variety of power supply conditions of microprocessors and other sensitive devices. This device is classified as a PMIC (Power Management IC) or supervisor because of its ability to protect against certain types of power supply issues. This article explores the application fields and working principles of the TPS3780DDBVR.

Overview and Applications

The TPS3780DDBVR is a four-in-one, single-output supply voltage supervisor with a wide range of adjustable voltage threshold. It combines the features of an overvoltage detector, an undervoltage detector, a reset controller and an undervoltage lockout in one small package. It is designed for protection of low voltage and battery-powered systems, such as notebook computers, where it can be used to monitor the supply voltage level of the microprocessor and enable its reset pin if the voltage drops below a user-set level.

The TPS3780DDBVR is also suitable for applications needing to detect and respond to overvoltage conditions, such as power backplanes for hot pluggable cards or other systems where overvoltage protection is required. In addition, it is heavily used in industrial automation and motor control systems, especially those powering equipment in rugged or hostile environments.

Features and Benefits

The TPS3780DDBVR is a precision voltage monitoring device, capable of detecting and responding to a wide range of supply conditions. It includes a number of features to protect its load device from damage due to overvoltage or undervoltage conditions.

The device offers excellent accuracy with 25mV of hysteresis, making it ideal for use in applications requiring tight voltage regulation. It also features a programmable reset delay, which allows the reset to be triggered without having to worry about noise on the supply line.

The reset controller on the TPS3780DDBVR has an internal pull-up resistor and an adjustable reset active voltage threshold. It also provides an external input to enable reset polarity control.

In addition, the TPS3780DDBVR provides an undervoltage lockout (UVLO) feature, which prevents the load device from functioning unless the supply voltage is at or above the user-specified minimum level.

Overall, the TPS3780DDBVR provides reliable and accurate monitoring of the power supply voltage level. Its features make it well-suited for use in a variety of different applications requiring voltage monitoring and protection.

Working Principle

The TPS3780DDBVR is a precision monitoring device that uses a Voltage-Sensing Input (VI) pin to monitor the power supply voltage level. This input is connected to the power supply line being monitored.

When the voltage level on the VI pin is above the user-specified Overvoltage Set Point voltage (OVSET), the overvoltage output (OV) is asserted. When the voltage falls below the Undervoltage Set Point voltage (UVSET), the undervoltage output (UV) is asserted.

The reset pin (RST) is connected to the reset controller, which has an internal pull-up resistor and an adjustable reset active voltage threshold. When the voltage on the VI pin is below this threshold, the reset pin is asserted.

In addition, the TPS3780DDBVR includes an undervoltage lockout (UVLO) feature, which prevents the load device from functioning unless the supply voltage is at or above the user-specified minimum level.

Conclusion

The TPS3780DDBVR is a PMIC (Power Management IC) or supervisor that provides reliable monitoring of the power supply voltage level and protection against a variety of power supply conditions. It is suitable for use in a variety of applications, such as notebooks, industrial automation and motor control systems. Its features, such as programmable reset delay, adjustable reset active voltage threshold, and undervoltage lockout, make it well-suited for these applications.

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