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Introduction

The TEA1611T/N1,518 is a monolithic integrated circuit used as a power supply controller, monitor, and supervisor in converter-based power-supply designs for the continuous output voltage regulation. It includes a voltage regulator control loop plus a variety of power supply related functions and can be applied to a wide range of applications such as notebook PCs, personal digital assistants (PDAs), and other systems where an efficient and reliable power source is needed.

Application Field

The TEA1611T/N1,518 is designed to be used in a wide range of power supply applications, including desktop computers and portable electronic devices such as cell phones and PDAs. It can be used in constant voltage and constant voltage/constant current applications, and can be configured for multiple voltage levels. The device is also suitable for use in EMI sensitive environments.

In desktop computers, the TEA1611T/N1,518 is used to control and monitor multiple sources of power, such as a wall-mounted power outlet, a battery, and a mainboard power supply circuit. The device is able to monitor and regulate the voltages from each source, ensuring that the system is provided with the optimum power level. The device can also detect voltage drops or power loss and respond accordingly, switching from a battery, or an external AC or DC source, to when necessary.

In portable applications, the TEA1611T/N1,518 is used to provide a reliable constant voltage power source for the system. As the device is able to monitor multiple power sources, it is able to maintain the voltage level, even if the power source is being changed or interrupted. This ensures that the system has a continuous power source and reliable performance.

Working Principle

The TEA1611T/N1,518 uses a voltage regulator architecture to maintain a desired output voltage by using a sensing voltage that is compared to a reference voltage. If the voltage is outside of the desired range, then the device will activate an appropriate duty cycle pulse-width modulation (PWM) to adjust the output voltage. The duty cycle voltage is adjustable, allowing for the required output voltage to be maintained during different operating conditions.

The TEA1611T/N1,518 includes a number of protection functions such as under voltage lockout (UVLO), over voltage protection (OVP), current limit protection (CLP), and short circuit protection (SCP). These protection functions are enabled via user programmed configuration registers or by external signals. Thus, the device can be configured for multiple power supply safety duties.

Additionally, the TEA1611T/N1,518 is equipped with a number of status pins, which can be used to provide feedback on the current operating status. The status pins can detect different events, such as absent power supply and over voltage, and indicate these events with a logic high signal. This feedback can be used to initiate corrective actions, as required.

Conclusion

The TEA1611T/N1,518 is a highly cost-effective IC designed to control and monitor multiple power sources within a power supply system. It can provide reliable and consistent voltage regulation, as well as a range of protection functions, which make it suitable for use in a variety of applications, from desktop PCs to portable electronic devices.

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