TL7702BCPG4

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A PMIC, otherwise known as a Power Management Integrated Circuit, is a combination of various power management components that provides an integrated solution for various power related needs. A supervisor is a specialized form of a PMIC that provides the primary control and monitoring functions for a circuit or a system. The TL7702BCPG4 is a supervisor designed for small 3V to 5.5V powered applications. It provides smart power management by detecting errors, controlling outputs, and monitoring the system. In this article, we will discuss the application fields and working principle of the TL7702BCPG4.

Application Fields

The TL7702BCPG4 is typically used in mobile devices, personal computers, wearable electronics, computer peripherals, home electronics, internet of things (IoT) devices, power management systems and automotive applications. It is ideal for these applications due to its low quiescent current and wide input supply voltage range. It also offers high noise immunity and fast rising edge detection. Its small package size of 1.25mm x 1.6mm x 0.5mm and low external component count make it ideal for space-constrained applications.

The TL7702BCPG4 offers a wide range of features such as system reset, input supply voltage monitoring, over temperature monitoring, and brown-out protection. The reset circuitry features an 8ms assertion delay and 5ms de-assertion delay, ensuring proper timing of reset signals. The input supply voltage monitoring detects low, medium and high input supply voltages, and can be reset when specified conditions occur. The over temperature monitoring feature detects when the temperature of system exceeds the programmed setting, and will generate an output low signal. The brown-out feature monitors the input voltage and can be used to prevent system malfunction due to insufficient voltage. The reset signal can be chained to other reset circuits or open drain devices.

Working Principle

The TL7702BCPG4 is a supervisor that provides efficient power management by monitoring and controlling supply voltages. It is designed to detect errors, controlling outputs, and monitoring the system. It works by monitoring the voltage conditions of the power supply. When the voltage of the power supply drops to below the pre-set level, the supervisor engages protection. It does this by a series of delay timer circuits, which will activate a reset signal. If the voltage conditions correct themselves within the delay time, then no reset signal will be generated. Additionally, the TL7702BCPG4 can generate an output high if the voltage is acceptable.

The TL7702BCPG4 also features a number of additional controlling and monitoring functions, such as supply voltage monitoring, over temperature protection and brown-out protection. The supply voltage monitoring monitors the voltage on the supply line and can reset the system when it drops too low. The over temperature protection monitors the temperature of the system using a thermal sensor and will generate a reset signal when the temperature is too high. The brown-out protection is used to prevent the system from malfunctioning in the event of lower than expected input voltages.

The reset timing of the TL7702BCPG4 can be adjusted using a capacitor, which is used to store charge and provides the delay time. It is also possible to chain reset circuits to other open drain reset devices using the reset enable pins of the supervisor. This allows for a more efficient power management system.

Conclusion

The TL7702BCPG4 is a supervisor designed for small 3V to 5.5V powered applications. It is ideal for use in mobile devices, personal computers, wearable electronics, computer peripherals, home electronics, internet of things (IoT) devices, power management systems and automotive applications due to its small package size, low quiescent current, wide input supply voltage range and low external component count. Its primary purpose is to provide smart power management by detecting errors, controlling outputs, and monitoring the system. Its reset timing can be adjusted by an external capacitor, and it can be chained to other open drain reset devices.

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