UCC3911DP-3 Integrated Circuits (ICs)

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The UCC3911DP-3 is a current-mode PWM controller with a peak current-mode control architecture, precision voltage reference (1.2V) and an oscillator to regulate the internal operation. It provides complete protection against overtemperature, overvoltage, and overload conditions. This device is primarily used in low-voltage industrial battery management applications, such as portable power tools, medical equipment, and consumer electronic products.

The UCC3911DP-3 works on the principle of peak current-mode control, which requires a current source or shunt to be placed in the circuit. This current source can be in the form of a separate external current source or a built-in sense resistor. The ratio between the voltage from the external current source or sense resistor and the internal 1.2V reference determines the share of power to be used for the load connected to the circuit. The peak current-mode control architecture of the device is responsible for the proportional action taken in order to regulate the speed of the motor or the output power available at its terminals.

This device uses its external parts, such as the small-value resistor and external current-sensing shunt, to sense the peak current. With the help of its internal oscillator, it regulates the switch-on duration of the power MOSFETs at its output according to the load current, thereby providing maximum efficiency at the desired load current. Additionally, the high-precision voltage reference of the device ensures precision voltage regulation at its output.

The UCC3911DP-3 has a wide range of applications due to its versatility and wide range of features. This device is well suited for AC/DC switching mode power supplies as well as low-voltage DC/DC converters in various industrial applications, such as industrial battery management, portable appliances, medical electronic devices, and consumer electronics products.

In summary, the UCC3911DP-3 provides a complete solution for current-mode control that is suitable for low-voltage industrial battery management applications. It has an internal precision voltage reference (1.2V) and an oscillator to regulate its internal operation, along with a broad range of protection against overvoltage and overload conditions. It is also an ideal solution for AC/DC switching mode power supplies and low-voltage DC/DC converters.

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