UCC28911D

Duty Cycle:	--
Mounting Type:	Surface Mount
Supplier Device Package:	7-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width), 7 Leads
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	--
Fault Protection:	Current Limiting, Over Temperature, Over Voltage
Power (Watts):	12W
Frequency - Switching:	420Hz ~ 115kHz
Series:	--
Voltage - Supply (Vcc/Vdd):	6.5 V ~ 30 V
Voltage - Start Up:	9.5V
Topology:	Flyback
Voltage - Breakdown:	700V
Internal Switch(s):	Yes
Output Isolation:	Isolated
Part Status:	Active
Packaging:	Tube

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Introduction

The UCC28911D is an offline high voltage, high power AC-DC converter from Texas Instruments. It is designed to invert 115Vac to 5Vdc in a variety of admissible power conditions. It can also provide up to 9A current for low voltage systems. The UCC28911D employs an intelligent SMPS (Switch Mode Power Supply) topology that allows it to convert high units to lower voltage units, while using less components and reducing overall system cost.

Functionality

The UCC28911D helps to achieve energy efficient and cost effective AC-DC conversion. Its smart switch mode power supply technology enables the design of power supply systems that can resist high voltage without the need to use bulky transformers. The UCC28911D is also equipped with a wide input voltage range allowing it to support a variety of global electrical conditions. The device also offers a low output voltage of just 0.5V, making it suitable for applications where low voltage is essential. The UCC28911D is a synchronous rectification double FET device, which reduces the amount of power loss in the circuit. In addition, the device features cycle-by-cycle current limiting that helps to protect against overloads. The design also offers in-rush current limiting capability which helps to reduce spikes during the start-up process.

Applications

The UCC28911D is ideal for a range of applications including consumer electronics, desktop computers, servers, and medical equipment. It can provide power for industrial equipment, robotic systems, 3D printing, communications and networking equipment. The device is also suitable for a range of automotive applications, although it is not intended for use in automobiles. The UCC28911D is suitable for control in applications that need to support both high and low voltage requirements.

Working principle

The UCC28911D is a synchronous rectification double FET device, which enables it to sample the input voltage and regulate the output accordingly. The device uses an active Power Factor Correction technique to ensure efficient power conversion. This involves using efficient operation of the switching devices to deliver the right amount of power supply to the circuit. The UCC28911D also uses a current loop to control the power conversion process and to ensure that the oscilloscope frequency remains constant. The current loop consists of two amplifiers and a comparator, which helps to monitor and regulate the switching devices.

Conclusion

The UCC28911D is a versatile, cost-effective and energy-efficient AC-DC solution. It employs smart switch mode power supply technology and synchronous rectification double FET design to offer reliable, efficient power conversion across a range of applications. The device’s current loop and active power factor correction ensure that the output is stable and reliable under all conditions. Overall, the UCC28911D is an excellent choice for any application requiring reliable AC-DC conversion.

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