TPS3824-30DBVR

PMIC - Supervisors

PMIC – Supervisors are power management integrated circuits (PMIC) specifically designed to provide flexible protection and reset functions for a wide range of circuits and systems. The TPS3824-30DBVR is a supervisor IC from Texas Instruments which is specifically designed for microprocessor and microcontroller systems.

Applications

The TPS3824-30DBVR is used to monitor the power supplies of microcontroller or microprocessor systems. It helps in providing an automated reset or reset timeout feature for these systems. It also provides protection from brownouts and power supply overvoltage conditions. It can also be used to change the default reset pin in the system as its RESET pin is open drain/collector output.

It is also used in multiple application-specific modules such as motor drives, smart home devices and operation modems. It can also be used in applications such as industrial automation systems and closed loop inverters where an emergency shutdown or brownout occurs.

Features

The TPS3824-30DBVR has a wide input voltage range of 2.7V to 5.5V, providing sufficient power for any given application. It includes an internal voltage regulator and a voltage monitor, which is responsible for providing the desired voltage and monitoring the voltage level respectively. The power-on reset (POR) threshold is adjustable from 2.7V to 5.5V, making it suitable for any type of circuit.

It also has an input enable/disable control, which allows the user to enable/disable the voltage monitor or the internal voltage regulator. This feature is especially useful for systems which require a real-time power monitoring. It has a watchdog timer which can be programmed to trigger a reset if an unexpected event occurs. It also has an over-temperature fault monitoring feature and a temperature-sensitive reset.

Working Principle

The TPS3824-30DBVR uses a voltage monitor and an internal voltage regulator to provide the desired output voltage. The voltage monitor monitors the input voltage and output voltage of the regulator and generates a RESET signal when the output voltage is outside the specified range. This RESET signal is then used to reset the microprocessor or microcontroller system.

The internal voltage regulator of the TPS3824-30DBVR is responsible for regulating the output voltage to the desired level. It is a voltage-frequency converter which uses an internal oscillator to generate an output voltage at a fixed frequency. This frequency is determined by the input voltage. The internal voltage regulator constantly adjusts the frequency and output voltage, so that the output voltage is maintained within the specified range.

The TPS3824-30DBVR also has a watchdog timer which is used to detect unexpected events or parameter changes. If an unexpected event or parameter change occurs, the watchdog timer will trigger a reset of the microprocessor or microcontroller system. The watchdog timer is programmable and the user can choose a suitable time for the reset duration.

The TPS3824-30DBVR also has an input enable/disable control. This feature is useful for systems which require a real-time power monitoring. The user can enable/disable the internal voltage regulator or the voltage monitor with this input. This helps in preventing unsolicited events in the system.

Conclusion

The TPS3824-30DBVR from Texas Instruments is a supervisor IC which is specifically designed to provide robust protection and reset functions for microcontroller and microprocessor systems. It has features such as a voltage monitor and an internal voltage regulator, a programmable watchdog timer, an input enable/disable control and an over-temperature fault monitoring feature. These features make it suitable for a wide range of applications such as motor drives, smart home devices and industrial automation systems.