UCC2808AQDR-2EP Integrated Circuits (ICs)

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The UCC2808AQDR-2EP is a high-performance off-line power factor correction (PFC) and active pulse-width modulation (PWM) control circuit. It utilizes advanced control techniques to provide the correct power factor and phase shift required by non-CFL lighting and phase-controlled loads, while consuming very little power. It is suitable for a wide range of AC power supply conditions, from 85 VAC to 265 VAC. The device is particularly well-suited for applications with active PFC and tight input voltage and current regulation, such as power supply designs for gaming systems, white goods, medical equipment, and industrial control systems.

The UCC2808AQDR-2EP is a fully integrated DC-DC switching controller for offline AC-DC conversion with active PFC, such as those used in desktop and laptop adapters, LED drivers, power supplies for computers, and telecom systems. It offers a high level of integration with features including a Zero Voltage Switching (ZVS) PFC solution and Constant Current Mode operation. The device integrates an isolated AC-DC PWM controller, a detailed programmable current mode PFC controller, an error amplifier, a low-voltage lockout, and a zero total harmonic distortion (ZTL) controller. The PFC controller detects and regulates the output power factor and provides very precise input line regulation for a wide range of input voltages.

The UCC2808AQDR-2EP provides both closed loop and open loop control which enables the device to run in Burst Mode operation with improved efficiency under light loads. With its integrated start-up stage, it can operate reliably at no load and off-line operations with a minimum of supply components. The device also provides high EMI performance and can meet the EN61000-3-2 and EN55000-3 during continuous conduction mode (CCM) of operation.

The UCC2808AQDR-2EP is designed to address high efficiency, reduced power losses, improved power factor (PF) and total harmonic distortion (THD) requirements in non-cfl lighting and phase-controlled loads. The device features an internal 650 V power MOSFET and a built-in ZVS flyback controller. It also supports current-mode operation for the PFC stage and power stage control loop bandwidths down to 32 kHz. The PWM switching frequency is programmable and can be adjusted up to max 400 kHz. The device features an internal 5 V low-power start-up, low-voltage lockout, over-voltage protection, thermal shutdown and an external current sense comparator.

In conclusion, the UCC2808AQDR-2EP is a high performance integrated DC-DC switching controller suitable for offline AC-DC conversion with active PFC. It offers excellent efficiency, improved power factor and lower total harmonic distortion. Its integrated Zero Voltage Switching (ZVS) PFC solution and Constant Current Mode operation make the device ideal for a wide range of applications.

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