UCC2897APWR Integrated Circuits (ICs)

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The UCC2897APWR is a complex Voltage Regulator component in the Power Management Integrated Circuit (PMIC) family. As part of the DC DC Switching Controllers category, this component is an effective choice considering its multi-stage topology, low standby power dissipation, high-efficiency, integrated compensation, and on-chip trimming.

The UCC2897APWR is typically used in applications such as motor control, AC/DC charger, adapter, PC/IGPS, and embedded systems.

Particularly, when implemented in motor control, its switching frequency is optimized such that it is up to 2MHz, thus allowing for higher output current capability, rated at up to 242kHz. Plus, its protection features, such as over-voltage protection, short-circuit protection and hiccup mode, effectively improve the system’s reliability.

For AC/DC design, the UCC2897APWR’s features create a robust immunity to line transients and load transients as well as its current limit protection that ensures a stable output voltage from line drops or load transients. It also features optimized standby power dissipation when not in use.

On the other hand, PC/IGPS applications can benefit from its high efficiency, low EMI performance and superior standby power dissipation. In addition, its integrated soft-start and cycle-by-cycle quasi-peak current limit help ensure that the output remains stable and reliable.

As for embedded systems, the UCC2897APWR can ensure a better system integration with its integrated protections such as over-voltage and cycle-by-cycle current limit. Plus, its switching frequency is up to 2MHz so that the output current is higher and more efficient.

General features of the UCC2897APWR include a wide input voltage range of 4.5V to 27V, an integrated high-side switch with 2MHz operation for optimal current capability, over-voltage protection with a threshold of 25V, a low voltage rated at 5V, a low standby current consumption up to 0.3uA, a wide output voltage range from 0.8V to 18V, and a low EMI/RFI performance.

To provide a stable output voltage, this DC-DC switching controller implements a multi-stage topology. This involves an error amplifier, followed by a voltage-controlled oscillator, a low-side switch, an H-bridge switch, and a protection circuit.

The error amplifier adjusts the output voltage according to the feedback voltage and the reference voltage. It then uses the voltage-controlled oscillator to control the switching frequency and the on-time of the low-side switch while the H-bridge switch is responsible for the current path of the inductor. Finally, the protection circuit maintains the stability of the system and it also ensures that in the case of a system fault, the system remains in protection mode and does not over-dissipate heat.

In conclusion, the UCC2897APWR is a powerful Voltage Regulator controller from the PMIC family’s DC-DC Switching Controllers. Its applications range from motor control, AC/DC charger, adapter, PC/IGPS, and embedded systems. It implements a multi-stage topology that includes an error amplifier and several protection circuits to ensure reliable, stable and efficient output voltage at all times.

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