TL7712AIDR

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TL7712AIDR: Application Field and Working Principle

TL7712AIDR, a supervisory circuit part of Texas Instruments’ Power Management Integrated Circuit (PMIC) family, is a 3-volt, Push-pull reset generator that offers the ability to monitor and detect power supply rail voltages, system supply faults, and external reset signals. This device can be used to detect power supply failures or power surges and assists power-up/power-down sequencing. It combines both push-pull reset generator and supply voltage monitor functions. It also prevents system reset due to voltage drop out while coming out of power-down.

Overview of TL7712AIDR

The TL7712AIDR is designed to provide fault monitoring and to detect supply conditions. It enables designers to respond effectively to reset conditions due to input supply overvoltage, undervoltage, or system supply fault conditions. This device features two push-pull reset generator outputs (RESET# and PWROK), which provide reset of the system in response to an undervoltage, overvoltage, or system supply fault condition.

The TL7712AIDR features an adjustable threshold window, which triggers the reset on detection of an undervoltage or overvoltage fault. The voltage threshold range is adjustable from 0.3V to 2.95V and includes a programmable low-delay reset after power-on and power-off sequence. It also provides a clear and accurate supply voltage monitor with a nominal voltage range of 3.0V.

The TL7712AIDR also includes an active push-pull output RESET# that provides an assertion time of less than 1ms with an on-board capacitor. The device has an active-low PWROK output that is enabled once the voltage reaches the specified threshold and is maintained over the duration of the power-up/down cycle. The device also features an internal watchdog timer for the detection of system lockups.

Features of TL7712AIDR

The TL7712AIDR comes with several features that make it an ideal choice for power management applications:

• – Built-in voltage dropout detector with adjustable threshold range (0.3V to 2.95V) for detecting low-voltage conditions.
• – Active low PWROK output with reset active high output.
• – Programmable low-delay reset on power-on/off sequence.
• – Internal watchdog timer for system lockups.
• – Segmented voltage monitoring for better accuracy.

Applications of TL7712AIDR

The TL7712AIDR is ideal for low-voltage and noisy application environments. It can be used in a variety of applications, such as embedded systems, industrial controllers, medical equipment, and communications systems. It is also used in automotive and aerospace applications. Additionally, it is used in battery-based applications that require accurate voltage monitoring while coming out of power-down mode.

Working Principle of TL7712AIDR

The TL7712AIDR is a combination of push-pull reset generator and supply voltage monitor. It provides an adjustable threshold window that triggers the reset on detection of an undervoltage or overvoltage fault. The open-drain PWROK output asserts active low once the voltage reaches the correct threshold and is maintained over the duration of the power-up/down cycle. Additionally, it also provides a clear and accurate supply voltage monitor with a nominal voltage range of 3.0V.

It also features a low-delay reset after power-on/off sequence, using a capacitor connected to its reset input. The device features an internal watchdog timer for detection of system lockups. This device senses both regulated and unregulated voltage levels, adjusting automatically to match the variations in supply voltage.

The TL7712AIDR is also capable of preventing system reset due to voltage dropout while exiting power-down mode. It provides fast recovery from reset and no external capacitor or resistor is required to stabilize the reset output. The device is capable of operation over the operating temperature range of -40 °C to125 °C.

Conclusion

The TL7712AIDR is an ideal solution for low-voltage and noisy applications, providing fast reset recovery and adjustable fault threshold window. It combines both push-pull reset generator and supply voltage monitor functions and is capable of detecting both regulated and unregulated voltage levels. As such, it is an ideal choice for embedded systems, industrial controllers, medical equipment, communications systems, automotive, and aerospace applications that require a reliable and accurate power solution.

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