UCC3802DTRG4

Duty Cycle:	99%
Base Part Number:	UCC3802
Mounting Type:	Surface Mount
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Frequency Control
Fault Protection:	Current Limiting
Frequency - Switching:	Up to 1MHz
Series:	--
Voltage - Supply (Vcc/Vdd):	8.3 V ~ 12 V
Voltage - Start Up:	12.5V
Topology:	Boost, Buck, Flyback, Forward
Voltage - Breakdown:	--
Internal Switch(s):	No
Output Isolation:	--
Part Status:	Active
Packaging:	Tape & Reel (TR)

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IntroductionUCC3802DTRG4 is a high voltage switching regulator from Texas Instruments designed for applications in power management. The UCC3802DTRG4 has been specifically designed for use in ultra-low voltage, high-efficiency DC-DC converters and offline switchers. UCC3802DTRG4 integrates an accurate current limit and AC or DC input monitoring signal. The integrated current limit is adjustable and can be disabled. UCC3802DTRG4 effectively compensates for temperature variations, and provides a current limit signal with a mono-stable driving capability and overcurrent protection.Application fieldsUCC3802DTRG4 is well suited for applications in DC-DC converters and offline switchers, delivering reliable performance and robust protection. The UCC3802DTRG4 is especially suited for portable and energy constrained designs that cannot afford the high voltage requirements of a linear regulator; such as, mobile phones, portable audio, gaming consoles, white goods, etc. The UCC3802DTRG4 also offers excellent low voltage operation and is designed for operation from 3.2V to 24V.FeaturesUCC3802DTRG4 is designed to provide a high level of performance with excellent efficiency and low power consumption. The device’s features include a fast current limit with adjustable soft start, a low ripple operation, and precise internal current regulation and voltage regulation. The fast current limit, adjustable soft start and precise current and voltage regulation help ensure that the UCC3802DTRG4 will provide a reliable and robust operation even in extreme conditions.UCC3802DTRG4 is extremely versatile and can be used in a variety of applications. The device has numerous protection functions, including an output short circuit protection, over voltage protection, under voltage protection and over temperature protection. Additionally, the UCC3802DTRG4 can be easily integrated into various systems, thanks to its SPI bus interface and wide range of voltages.Working PrincipleUCC3802DTRG4 is designed to operate as a DC-DC converter or offline switch. The device works by taking an AC or DC voltage input of 3.2V to 24V and using it to generate a regulated DC output voltage. The device utilizes a tightly integrated switch control block and output stage to provide a fast, precise and efficient power conversion. The controlled switch is used to accurately regulate the output voltage by comparing the output voltage to an internal reference voltage.The internal switch control block of the device has an input terminal sense section, an oscillator, a pulse width modulation (PWM) generator, a overcurrent protection circuit, a current feedback loop and an output short circuit protection section which all work together to maximize efficiency and ensure a constant output voltage even with dynamically changing loads.The device also includes a slew rate compensation circuit to minimize any voltage droop when the load is changed. This allows UCC3802DTRG4 to effectively maintain stable output voltage even under varying loads.ConclusionUCC3802DTRG4 is an excellent choice for applications in DC-DC converters and offline switchers. It offers a wide range of protection features and is designed for operation from 3.2V to 24V. The device also has the capability to achieve high levels of efficiency thanks to its tightly integrated switch control block and output stage, precise current and voltage regulation, and slew rate compensation circuit.

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