UCC2583DG4

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Introduction to UCC2583DG4

The UCC2583DG4 is a dual-phase synchronous Buck Controller designed to provide high performance power conversion solutions for power systems that require high efficiency and excellent transient response. The UCC2583DG4 integrates high performance MOSFET drivers, an adjustable frequency peak current mode control circuit, accurate and adjustable current sensing, and an adjustable soft start feature. The system provides an excellent low noise operation and a wide input voltage range of 9V to 17V. Additionally, the UCC2583DG4 supports full-ranged output voltage regulation, reverse battery protection and thermal protection.

Application Field

The UCC2583DG4 is well suited for applications such as automotive power systems, automotive auxiliary power systems, ATX supplies, desktops, servers, LED lighting systems, and rapid charging power supplies. It can also be used in notebook computer, tablet, and smart phone power supplies. Additionally, the UCC2583DG4 is an ideal power solution for embedded and industrial systems.

Working Principle

The UCC2583DG4 utilizes a pulse width modulation (PWM) control technique. The integrated PWM comparator compares the signal level of an internally generated triangle wave with the output of an error amplifier. The PWM comparator then provides a digital signal to control the output power MOSFETs. The power MOSFETs are then driven via a pair of high contrast, low propagation delay drivers. When the output voltage is set lower than the input voltage, power is transferred from the input to the output, resulting in a decrease in output voltage. When the output voltage is set higher than the input voltage, power is transferred from the output to the input, resulting in an increase in output voltage.

The PWM signal is generated using a voltage controlled oscillator (VCO) circuit. The VCO, which is adjusted by the output voltage feedback signal, produces a pulse at a specific frequency. The peak current sense amplifier is also adjusted by the error amplifier. The peak current sense amplifier then monitors the current through the MOSFETs and provides peak current limit protection. The integrated active current sharing control circuit additionally provides accurate current control for high parallel applications.

The UCC2583DG4 includes voltage and current monitoring functions which can be programmed to provide warning signals if either an over-voltage or an over-current condition is detected. Additionally, the UCC2583DG4 includes an adjustable soft start feature and an adjustable voltage slope through which a turn-on is delayed and an overshoot is minimized.

Conclusion

The UCC2583DG4 is an advanced dual-phase synchronous Buck Controller designed to provide high performance power conversion solutions for a range of applications. The UCC2583DG4 provides an excellent low noise operation and excellent maximum power transfer efficiency. It further incorporates active current sharing control, voltage monitoring, and current monitoring which provide the necessary regulation and protection against over-voltage and over-current conditions. This makes the UCC2583DG4 an ideal solution for automotive power systems, automotive auxiliary power systems, ATX supplies, desktops, servers, LED lighting systems, and rapid charging power supplies.

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