TPS3847085DBVR

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The TPS3847085DBVR is a device from Texas Instrument’s Power Management Integrated Circuits (PMIC) family that targets applications requiring high precision voltage monitoring, sequencing and control with voltage protection. It is a highly integrated supervisor device that exists in the PMIC – Supervisors product family. The main features of the TPS3847085DBVR are its I²C/SMBus digital interface, voltage levels of 4.50V and 3.60V, input frequency range of 32.768 KHz, pulse bypass time of nPOR and nPOR, active time-out delay of up to 3.2s, and supply voltage range of 1.71V to 5.5V. The TPS3847085DBVR operates with a wide range of programmable features that allow users to offer optimal power-on sequencing, voltage threshold detection and sequenced reset. It also includes a 32 bit cyclic redundancy code (CRC) for the data transmitted over the I2C/SMBus. This enables the device to secure the product’s calibration and programming data, ensuring it does not get corrupted over time. TPS3847085DBVR and its applications The TPS3847085DBVR can be used in a wide range of applications. These include automotive, medical, industrial, consumer and communications applications. It is suitable for applications requiring precise voltage and power monitoring, sequencing, and protection. The automotive applications include automotive electronic control units (ECUs), powertrain systems and power window systems. The medical applications include patient monitors, lab and medical equipment, and portable medical devices. The industrial applications include motor control, security systems, power and motor management, and data storage systems. The consumer applications include cellular and wireless receivers, digital cameras and radios, handheld game consoles and portable music players. The communication applications include cable modems, datacom, wireless and wireless sensor networks. TPS3847085DBVR Working Principle The TPS3847085DBVR is based on a simple yet highly reliable architecture. It consists of a standard supervisor IC structure with an external reference voltage. Additionally, it has an I²C/SMBus digital interface, pulse bypass time and active time-out delay. The external reference voltage is used to set the supervisor’s limits. It is used to determine the initial and final values of the input voltage range over which the transistor can control. This is done by setting the appropriate voltage threshold for the supervisor. The I2C/SMBus digital interface enables communication with other components. This allows users to configure and monitor the TPS3847085DBVR’s operation and functions. It also provides data security by leveraging the 32 bit cyclic redundancy code (CRC). The pulse bypass time refers to a timer that helps eliminate the glitches that come up when turning off the power switch by adding an active time-out delay. The active time-out delay times the operations of the supervisor and protects the system from being powered up quickly. This allows the system to settle before the power rails are re-activated and the outputs become active. The TPS3847085DBVR is designed such that it can detect low input voltage and overvoltage events. It can detect low battery voltages (as low as 1.71V) and will indicate a power fail signal. The power fail signal is then used to inform the microcontroller or logic circuitry to shut down. Similarly, it can sense an overvoltage and drive the signal to a low level to indicate that the voltage has exceeded the high voltage threshold. Conclusion The TPS3847085DBVR is an integrated supervisor device that offers high precision voltage monitoring, sequencing and control with voltage protection. It is suitable for applications requiring precise voltage and power monitoring, sequencing, and protection. It features I2C/SMBus digital interface, pulse bypass time, active time-out delay, a wide voltage range and CRC support, which makes it a reliable voltage supervisor device.

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