UC2903QTRG3

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The UC2903QTRG3 is an adjustable thermal shutdown supervisor that helps protect circuits and components from potential damage by tracking their temperature level and inputting an appropriate shut down signal whenever the upper threshold temperature is exceeded. It is typically used as a single-ended thermal detector in applications requiring shutdown due to overheating, such as power supplies, motor drives, and systems with high levels of heat dissipation.

The device has an extremely wide operating temperature range of -55 to 150 °C and an adjustable threshold temperature range of 0 to 150 °C, making it suitable for many applications. Its low supply current of only 5 µA and excellent temperature accuracy of ± 2 °C makes it suitable for battery-powered equipment.

The UC2903QTRG3 is a Unipolar Type Thermal Shutdown Supervisor with an adjustable delay of up to 4ms. The delay allows a desired circuit condition to be maintained for a pre-determined time period before the shutdown feature is activated. This benefit is especially useful in pulsed applications, providing the circuit with a longer window of operation and more time to cool down.

The IC has two outputs: thermal shutdown and delay output. The thermal shutdown output is used to turn off or inhibit the supply voltage when the temperature exceeds the threshold level. The delay output provides a delay of up to 4ms after the threshold has been exceeded and then signals the delay output to initiate a shut down/inhibit action. This allows for delayed shut down/inhibit of the power supply for greater protection of the application against over-temperature conditions.

The UC2903QTRG3 is designed to replace the power supplies of existing applications with higher thermal requirements and provide maximum thermal protection. The device is easily integrated into existing circuits, as there is no need to change any components. The device provides an accurate temperature threshold setting, adjustable time delays, and an LED indicator to indicate ove-temperature conditions.

The UC2903QTRG3 is primarily used in power supplies, motor drives, and systems with high levels of heat dissipation. The device is ideal for applications that require precise thermal control such as battery chargers, notebook computers and multimedia applications. In addition, the device is suitable for use in automotive, telecom and appliance applications.

In summary, the UC2903QTRG3 is a critical component for applications requiring precise thermal control and protection. The device features an adjustable thermal threshold and an adjustable delay of up to 4ms, allowing for a greater temperature window of operation and more time to cool down. It is suitable for a wide range of applications in the automotive, telecom and appliance spaces, as well as in power supplies, motor drives and systems with high levels of heat dissipation.

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