UC37131D

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UC37131D is a power distribution switch, load driver, and protection device from the market-leading manufacturer STMicroelectronics. The device includes two low-on resistance (RDS_ON) DMOS power switches, two high-side current sense amplifiers, and an under-voltage lockout (UVLO) circuit. This product integrates the optimal combination of advanced technologies to meet the stringent requirements of customer power supply applications.

UC37131D is designed to simplify the power distribution, minimize energy loss, and regulate power delivery to multiple loads while providing robust protection. The product supports switched or constant current modes and provides protection against overvoltage, overcurrent, and short circuit conditions. In addition, the device\'s built-in current sense amplifiers provide precision current sensing with a wide linear range and high accuracy.

The UC37131D device includes two high-side MOSFETs with an RDS_ON of 150 mOhms (typical) and a maximum current rating of up to 16A. The device operates from a supply range of 8V to 32V and is thermally protected against dissipation in fault conditions. Both high- and low-side switches have a fast turn-off time, which helps protect the load from inrush current.

The UC37131D application field includes motor control, power supply sequencing, automotive applications, load switching circuits, and general protection. In motor control applications, the device\'s current sense amplifiers can provide precision current sensing, while the low-on resistance MOSFETs can switch high-current power sources. The device\'s overvoltage and overcurrent protection features also offer superior protection for automotive systems as well as general power conversion applications.

The UC37131D works by utilizing an integrated voltage clamp circuit and an adjustable voltage reference. When the input voltage exceeds the adjustable voltage reference, the device limits the output voltage. The device also includes two current sensing amplifiers that provide linear current sensing and prevent output voltage fluctuations caused by changes in load. The device is designed to protect the applied load from overvoltage and current conditions, while providing a fast response time.

The UC37131D device includes an integrated under-voltage lockout (UVLO) circuit, which automatically turns off the power switch when the input voltage drops below a certain threshold, reducing power consumption and protecting the load from potential over-current or thermal events. The device also includes two low-on resistance (RDS_ON) DMOS power switches, two high-side current sense amplifiers, and an adjustable voltage reference. Together these features make the UC37131D a versatile and powerful device for a variety of power supply applications.

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