UCC28251PWR Integrated Circuits (ICs)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The UCC28251PWR is a high performance, low-cost fixed-frequency current mode controller. It is specifically designed to provide an accurate, well-regulated output voltage in power conversion applications. It features fast transient response and excellent line and load regulation characteristics. This device has been used in a number of applications involving voltage regulation, such as desktop and laptop computers, automotive, battery powered devices, programmable LCD monitors, and UPS systems. Furthermore, its built-in low-noise switching technology makes it a suitable choice for applications where low EMI (electro-magnetic interference) is a concern.

The UCC28251PWR is a highly integrated device that combines a variety of features to improve system efficiency and reduce component count. It is designed to be used in switched-mode power supplies and other power conversion applications requiring a regulated output voltage. The device is composed of several key components:

• Current Mode Control Circuitry - The current mode control circuitry consists of a voltage reference circuit, error amplifiers, current sense comparator, oscillator, voltage feedback loop, PWM (pulse width modulator) comparator, and current limit amplifier.
• Power Switching Circuitry - The power switching circuitry consists of two external power MOSFETs, gate drivers, bootstrap circuit, and protection circuitry.
• Output Voltage Reference - An external resistor divider is used to program the output voltage.

The UCC28251PWR combines the advantages of high performance current mode control with fast transient response, accurate line regulation, and low noise operation. The device supports a wide range of power transfer ratios and output voltage accuracy for digital and linear type power supplies.

The core of the UCC28251PWR is its current mode control circuitry. In current mode control, the output voltage is regulated by controlling the duty cycle of the power switch. This has a number of advantages over traditional voltage mode control, such as faster transient response and better line and load regulation. The precise regulation of the output voltage is achieved by comparing the voltage feedback signal to a reference voltage, which is then compared to the output of the PWM comparator.

The UCC28251PWR features an integrated bootstrap circuit and protection circuitry to provide safe operation in a wide range of applications. The bootstrap circuit ensures that the gate drive signals are always supplied to the power switch, regardless of the voltage at the power switch nodes. The protection circuitry detects overvoltage and undervoltage conditions, overcurrent conditions, and provides over temperature protection for the power switch.

The UCC28251PWR is a versatile device that can be used in a variety of applications such as automotive and industrial systems, avionics, instrumentation, medical systems, LED lighting, etc. Its high efficiency and low cost make it an attractive choice for cost-sensitive applications. It offers excellent flexibility in powering low voltage and high voltage systems, as well as power over Ethernet (PoE) applications.

The specific data is subject to PDF, and the above content is for reference