TC54VC1902EZB

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The TC54VC1902EZB is a versatile, low-power voltage supervisor from Texas Instruments’ Torex family of ultra-low-power Supervisor devices. It is designed for use in consumer, industrial, and automotive applications. This application note provides an overview of the TC54VC1902EZB, its working principles, and application fields.

Overview of TC54VC1902EZB

The TC54VC1902EZB is a voltage supervisor designed to monitor power supplies and supervise system-level power-up, power-down, and intermediate voltages in applications that require high accuracy and low quiescent current. It features an ultra-low quiescent current of just 4.9 µA (typical) and a wide operating temperature range of -40°C to +125°C. The TC54VC1902EZB is available in three variants, each with a different featureset:

• TC54VC1902EZB-CTL: A high-precision ±1% voltage supervisor with adjustable thresholds.
• TC54VC1902EZB-VAT: A temperature-compensated voltage supervisor with adjustable thresholds.
• TC54VC1902EZB-VAT-PM: A temperature-compensated voltage supervisor with programmable thresholds.

The TC54VC1902EZB integrates a precise voltage reference, voltage monitoring circuits and a Supervisor Output Module (SOM). It has an active voltage range from 1.6V to 5.5V and supports a variety of different logic output configurations. It also offers up to seven factory-programmed thresholds and is capable of monitoring up to three voltages simultaneously. Additionally, its output can be used to generate an interrupt signal.

Working Principle of TC54VC1902EZB

The TC54VC1902EZB features a flexible, integrated circuit (IC) block architecture to enable cost-effective implementation of low-power supervision with high accuracy. Its operation is based on a bandgap reference that provides a stable voltage reference with low temperature drift. The voltage reference is used to compare the monitored voltage to the preset thresholds and then generate the appropriate output logic state. The SOM block is used for integrated logic level translation and is designed to drive low-voltage logic families such as CMOS and LVCMOS (each up to 5V). The SOM block also integrates a loop filter that can be used to reduce output noise and response time.

The output logic level can be configured using a variety of logic states provided by the TC54VC1902EZB. The device can also be used to generate an interrupt signal that can be used to trigger external events. It also features an adjustable response time to allow the system to respond to changes in the input voltage quickly.

Application Field of TC54VC1902EZB

The TC54VC1902EZB is suitable for a wide range of applications, including consumer, industrial, and automotive. It can be used in battery-operated systems, Li-Ion cells, voltage regulation/multiphase power supplies, and automotive systems. It is also suitable for 3.3V or 5V operations and can be used to monitor several different voltages. Furthermore, its unique features makes it suitable for digital consumer and communications devices, where low quiescent current and high accuracy are essential.

In automotive applications, the TC54VC1902EZB is suitable for monitoring power rails for electronic control modules, ECUs and sensors. It can also be used to detect in-vehicle system voltages, such as those in the 12V, 14V, or 24V systems. Additionally, it can be used to monitor the battery or reverse battery protection.

In industrial applications, the TC54VC1902EZB is suitable for monitoring power supplies, battery-backup systems and backup power supply shutdown. The device can also be used to monitor system-level power-up, power-down, and intermediate voltages in applications that require high accuracy and low quiescent current. Additionally, its adjustable thresholds can be used to detect over- and undervoltage conditions, allowing for an accurate and reliable operation.

Overall, the TC54VC1902EZB is a versatile and low-power voltage supervisor from Texas Instruments that is suitable for a range of applications. Its low quiescent current, wide operating temperature range, and adjustable/programmable thresholds make it suitable for use in a variety of different systems.

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