UCC3580N-4

Voltage - Supply (Vcc/Vdd):	8.5 V ~ 15 V
Base Part Number:	UCC3580-4
Supplier Device Package:	16-PDIP
Package / Case:	16-DIP (0.300", 7.62mm)
Operating Temperature:	-55°C ~ 150°C (TJ)
Control Features:	Soft Start
Fault Protection:	--
Frequency - Switching:	--
Duty Cycle:	66%
Series:	--
Voltage - Start Up:	15V
Topology:	Flyback, Forward
Voltage - Breakdown:	--
Internal Switch(s):	No
Output Isolation:	Isolated
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The UCC3580N-4 is a highly integrated power management IC (PMIC) that combines both AC-DC and DC-DC converters. It provides up to four power supply rails, including a ±15V analog rail, a ±5V digital/PCIe rail, a 3.3V auxiliary rail, and a 5V standby rail. It has a power factor correction (PFC) stage and an off-line switcher, and can operate in a variety of different topologies including flyback and push-pull converters. It is ideal for applications that require multiple voltage rails, such as servers, network switches, communications, and industrial. Additionally, the UCC3580N-4 offers higher efficiency, higher power density, and lower cost than competing solutions.

Application Field

The UCC3580N-4 can be used in a variety of applications, from general-purpose server applications, to DVR and network security devices, to network switches, industrial systems, and any application that requires multiple power rails. The UCC3580N-4 provides the ability to generate multiple power rails from a single AC-DC power supply. Specifically, the UCC3580N-4 is well suited for server power supplies as its integrated PFC stage and off-line first-stage topology lead to higher efficiency and lower components cost. In industrial applications, the UCC3580N-4 offers a number of protection features, such as Over Voltage Protection (OVP), Under Voltage Protection (UVP), Over Temperature Protection (OTP), and Over Current Protection (OCP), which make it well-suited for use in more demanding applications such as process control and monitoring systems.

Working Principle

The UCC3580N-4 is a two-stage power management IC that combines an AC-DC (PFC) stage and a DC-DC stage. The AC-DC stage features a boost PFC pre-regulator which rectifies the input voltage and regulates it to the desired level. The PFC stage also provides current-limited current protection and voltage monitor output. The DC – DC stage is responsible for producing the multiple power rails. It consists of a driver stage, an oscillator, a power MOSFET, and a power transformer. The power MOSFET is driven by the driver stage, and the output voltage of the power transformer is dependent on the transformer turns ratio, the primary MOSFET duty cycle, and the input voltage. The duty cycle is determined by the oscillator frequency and ramp up/down voltage. The duty cycle can be adjusted through an external resistor. Additionally, the UCC3580N-4 offers current-limited current protection and remote on/off control.

Conclusion

The UCC3580N-4 is a highly integrated PMIC that provides four power rails with many protective features for industrial applications. It provides higher efficiency and lower component cost than competing solutions and is well-suited for AC-DC applications that require multiple power rails. With its integrated PFC stage and off-line switcher, the UCC3580N-4 is an ideal solution for a variety of power management applications.

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