UCC3808DTR-1 Integrated Circuits (ICs)

Duty Cycle:	50%
Base Part Number:	UCC3808-1
Mounting Type:	Surface Mount
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-55°C ~ 150°C (TJ)
Control Features:	Frequency Control
Fault Protection:	--
Frequency - Switching:	1MHz
Series:	--
Voltage - Supply (Vcc/Vdd):	8.3 V ~ 14 V
Voltage - Start Up:	12.5V
Topology:	Push-Pull
Voltage - Breakdown:	--
Internal Switch(s):	No
Output Isolation:	Isolated
Part Status:	Active
Packaging:	Tape & Reel (TR)

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UCC3808DTR-1 Application Field and Working PrincipleUCC3808DTR-1 is an integrated circuit that enables direct current to alternating current (DC-AC) conversion and is used in offline switchers. It works differently than a DC-DC converter which only converts DC to a different voltage. The primary circuits of offline switchers, including the UCC3808DTR-1, consume starting-up current up to some 30 times higher than their nominal current. This is known as the Cold Start current.UCC3808DTR-1 is a low-cost and low-components-count solution for isolated power supplies and isolated power stages. It is designed to provide a controlled linear output voltage from a DC input source. The device can be used in a wide range of applications from a few watts to several hundred watts. It can be used in residential and commercial consumer products such as computers, digital cameras, kitchen appliances, audio and video equipment, lighting and power tools. It can also be used in industrial applications such as programmable logic controllers (PLCs) and high-voltage power supplies.The device is powered with standard DC voltage such as 12, 15, 24, and 48 Vdc. It is rated for output power up to 450 watts, with efficiency reaching up to 94% depending on load and input voltage. The device operates between 45 kHz and 65 kHz with a low external component count. It features open- and short-circuit protection, thermal shutdown, and Hiccup function.The device consists of four main components - power switch, driver, controller, and boost inductor. The power switch is a low-side MOSFET switch and is controlled by the driver which is implemented using a dual-level composed of a high-voltage MOSFET and a low-voltage MOSFET. The driver is capable of driving up to 4A of peak current and switching frequencies up to 65kHz. The controller is implemented using an analog resonant controller for switching frequencies up to 65kHz and it is programmable through external components. The boost inductor is the output choke which helps convert the DC voltage to an AC output.In summary, UCC3808DTR-1 is a low-cost and low-components-count PMIC device that enables direct current to alternating current (DC-AC) conversion for offline switchers. It is used for a variety of applications from small consumer products to large industrial power supplies and has a wide range of operating frequencies from 45 kHz to 65 kHz. It is designed to providing a controlled linear output voltage from a DC input source and is capable of operating at up to 450 Watts with up to 94% efficiency.

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