TPS3702CX33DDCR

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Power management has become an increasingly important aspect in today’s world. As more and more electronic devices become interconnected and more complex, power management system are becoming more and more important. The TPS3702CX33DDCR is a member of Texas Instruments’ family of Power Management Integrated Circuits (PMICs) dedicated to this purpose. It is a programmable, low-power supervisor, which aids in the design of systems that require a reliable and accurate reset threshold. In this article, we\'ll discuss the application field and working principle of the TPS3702CX33DDCR.

TPS3702CX33DDCR Application Field

The TPS3702CX33DDCR is used primarily in applications requiring a reliable, accurate reset threshold. Specifically, this device can be used in battery-powered systems and any system where it is important to know when a power failure has occurred. They can also be used in systems that require a reset following a brown-out or an under/overvoltage condition. Additionally, the device can be used to protect systems from excessive current or when hot-swapping is needed for dual systems.

The TPS3702CX33DDCR can also be useful in automotive applications. It can be used for voltage monitoring in in-car navigation systems and audio systems, temperature-sensing in smart windows, ABS systems, and electronic brakes, as well as power distribution in electronic control systems. Finally, it can also be used as a watchdog timer to guard against system freezes or hang-ups.

TPS3702CX33DDCR Working Principle

The TPS3702CX33DDCR works by monitoring the supply voltage and comparing it to predetermined threshold values. These threshold values are programmed through its external resistor divider network. The device has three logic output pins: an active-low reset pin, a watchdog timer-expired pin, and an overvoltage detection pin.

The active-low reset pin indicates when the supply voltage drops below the programmed threshold. Once the reset pin is triggered, the device immediately asserts a pull-down of the reset pin (Logic 0) to indicate to the system controller that a power failure has occurred. It also forces the watchdog timer into reset mode, which halts the watchdog timer count sequence. The device then re-arms the reset pin when the supply voltage is higher than the programmed threshold voltage.

The watchdog timer-expired pin is triggered after the watchdog timer count sequence has completed. This pin provides an alert to the system controller that a system hang-up or freeze has occurred. The overvoltage detection pin is triggered when the supply voltage exceeds the programmed upper threshold. It takes its function from the overvoltage latch, which is programmed through the external resistor divider network. This pin is used for protection against excessive current.

Conclusion

The TPS3702CX33DDCR is a member of Texas Instruments’ family of PMICs dedicated to low-power supervisor design. It is used primarily in applications requiring a reliable, accurate reset threshold and can be used in a variety of application fields, including battery-powered systems, automotive applications, and hot-swapping systems. Its working principle involves monitoring the supply voltage and comparing it to predetermined threshold values and then activating the reset pin, watchdog timer, or overvoltage detection pin when the threshold is breached. This device is a reliable and accurate solution to power management needs.

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