UCC3813PW-4G4

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The UCC3813PW-4G4 is an AC/DC converter, which is an ideal solution for carrying out power-conversion applications. The 4-channel PWM controller features integrated high and low-side MOSFET drivers, a SenseFET for current sensing, and pulse-width modulation (PWM).

Overview

The UCC3813PW-4G4 is a 4-channel power factor corrected (PFC) ac/dc converter that offers a solution for performing the power-conversion task in SMPS (switched-mode power-supply) applications. With the 4-PWM channels, it can provide 4 independent outputs. The integrated high-side and low-side MOSFET drivers, along with the SenseFET for current sensing, make it suitable for carrying out a variety of power-conversion applications at a wide range of power levels. The power levels can range from hundreds of milliwatts to hundreds of watts.

The 4-channel PWM includes a slope compensation and a dead-time control circuit that helps in controlling the switching frequency, while the PFC function helps in reducing the line current distortion and improving the power-factor correction. This ensures a higher degree of power efficiency. The UCC3813PW-4G4 is designed to operate up to 48V and is available in a 4-mm × 4-mm, 10-pin LLP package.

Features and Benefits

• Integrated high-side and low-side MOSFET drivers
• SenseFET for current sensing
• Slope compensation and dead-time control circuit to control switching frequency
• Power factor correction (PFC) for reducing current distortion
• 4-mm × 4-mm, 10-pin LLP package
• Small size, low power, and low cost

Applications

The UCC3813PW-4G4 is suitable for both the standby and the main power supply of applications such as LCD monitors, digital TVs, digital cable converters, game consoles, instrumentation, and various other power-conversion applications that require an AC input.

Working Principle

The UCC3813PW-4G4 uses four independent channels to carry out PWM control of the AC/DC converter. The PWM control with its integrated high-side and low-side MOSFET drivers, along with the SenseFET for current sensing, is ideal for providing accurate and reliable power-conversion. The power-factor correction (PFC) enhances the efficiency of the converter by reducing the current distortion.

The UCC3813PW-4G4 also includes a dead-time control circuit and a slope compensation circuit to control the switching frequency. This ensures that the power-conversion network is operating at an optimal level to deliver efficient power-conversion over varying loads, temperatures, and AC input conditions.

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