UCC2893D

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UCC2893D is an advanced, high performance integrated switch controller designed specially for high power switch mode power supply applications. It is rated for up to 500 kW and features a wide variety of protection features, including over-temperature, over-current, and over-voltage protection. The UCC2893D is a DC-DC buck switch controller that offers the capability to step down an input voltage to a lower output voltage. This controller is designed to control an N-channel enhancement mode MOSFET switch to regulate an adjustable DC output voltage from a DC input voltage. It is a highly integrated solution optimized for high power applications.

The UCC2893D is designed to synchronize to an external clock, allowing the controller to be used in switched-mode power supply (SMPS) applications such as commercial and industrial high reactance power supplies, as well as new energy efficient designs such as integrated DC/DC converters with dual-output capability. The controller was designed to meet modern electrical engineering requirements, including reducing emissions and conforming to the Energy Star V3.0 standard. The UCC2893D is a great solution for high power applications with high efficiency and low emissions.

The UCC2893D is able to deliver high current output, with a maximum peak current-carrying capability of 500A. It is programmable for different output voltage and switching frequency, with a minimum guaranteed frequency of 300kHz. It also features low standby current, which helps to reduce power consumption in standby or sleep modes, a feature especially useful in mobile applications such as laptops and tablets.

In terms of its operation, the UCC2893D uses a high current power MOSFET and an adjustable fixed frequency peak current mode control circuit. To ensure that the switching frequency is kept constant, a pulse width modulation (PWM) signal is generated by comparing a feedback voltage with a reference voltage. The feedback voltage is the voltage sensed at the output of the circuit while the reference voltage is adjustable and can be programmed accordingly. The output frequency is then adjusted by modulating the duty cycle of the PWM signal using an internal digitally programmable oscillator.

In terms of protection, the UCC2893D includes a range of features for protecting itself and the system from operational faults such as over-voltage, over-temperature, and over-current. A programmable startup time helps to minimize in-rush current on system start up, while independent over-current, over-voltage, and undervoltage shutdown circuits are also included. An open loop protection feature allows for system protection in the event of a complete loss of the feedback signal. The device also features a sync pin to ensure synchronization between the controller and the external clock.

The UCC2893D is a highly integrated solution that was designed with a strong emphasis on protecting the system and helping to ensure efficient and reliable operation. Its powerful features make it ideal for high power applications such as commercial and industrial high reactance power supplies, as well as new energy efficient designs such as integrated DC/DC converters with dual-output capability.

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