UCC28061QDRQ1 Integrated Circuits (ICs)

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The UCC28061QDRQ1 is a high power density, flyback topology, primary side regulation, power factor correction (PFC) controller. This device includes fault protection, constant on-time (COT) control, and integrated PFC boost converter. This device is fully integrated into an IC, allowing efficient solution size reduction, and eliminating the need for additional external components.

This is a control IC widely used in desktop computers, home appliances, instrumentation, medical, lighting and other electronic equipment, designed to correct power factor, reduce harmonic noise and provide protection, etc. It is mainly used in offline AC to DC power supply, which requires high power factor, high efficiency and low cost.

The main working principle of the UCC28061QDRQ1 lies in its integrated flyback topology. It uses constant-on-time (COT) control, which gives excellent load transient response for load step changes, with fast response to line voltages. The device uses an internal current sense (CS) comparator to measure the inductor current, and compares it to the reference current. A High-side output switch is then used to turn on/off the output current. The device also includes a PFC pre-regulator that enables a high power factor and provides closed loop feedforward compensation. The pre-regulator also provides input protection, reduces component size, power dissipation and cost.

The UCC28061QDRQ1 also includes fault protection, which includes Internal Thermal Protection (ITP), Overvoltage Protection (OVP), under-voltage protection (UVP) and brown-out protection (BOPP). It also supports pulse-skip operation to reduce emission and minimize power loss in light load conditions. The device has an internal current sense amplifier that provides accurate current sensing and allows for accurate power factor control. It also features a low quiescent current, allowing for high efficiency operation.

In summary, the UCC28061QDRQ1 is a high power density, flyback topology, primary side regulation, power factor correction (PFC) controller which is mainly used in offline AC to DC power supplies that require high power factor, high efficiency and low cost. It features various fault protection, constant on-time (COT) control, integrated PFC boost controller, accurate current sensing and low quiescent current, allowing for efficient, optimized and cost effective solutions.

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