UCC2813D-3

Frequency - Switching:	--
Base Part Number:	UCC2813-3
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
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	99%
Series:	--
Voltage - Supply (Vcc/Vdd):	3.6 V ~ 12 V
Output Phases:	1
Number of Outputs:	1
Topology:	Boost, Flyback, Forward Converter
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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Introduction

UCC2813D-3 is a device in the line of power management integrated circuits (PMICs) of devices that are used for the efficient regulation of a device’s power consumption and voltage regulation. It is specifically a DC / DC switching controller in the voltage regulator space which is used for controlling the input and output voltages of static and dynamic load applications. The device offers a high accuracy control of the switching frequency, minimal power dissipation, optimized light-load operation and a complex protection structure which includes voltage protections and low power dissipation.

UCC2813D-3 Application Fields

UCC2813D-3 is a PMIC for voltage regulator and DC / DC switching controller applications. These applications often utilize the device’s ability to optimize the light-load operation of the power system. The UCC2813D-3 can be used in a variety of devices, ranging from audio amplifiers to backup systems. Applications that utilize the device may include:

• Audio amplifiers
• Smartphones
• Tablets
• Personal digital assistants
• Backup systems
• Automotive systems
• Medical devices
• Portable equipment
• Instrumentation systems

UCC2813D-3 Working Principle

The UCC2813D-3 is a voltage regulator and DC / DC switching controller. The UCC2813D-3 leverages its advanced architecture for controlling the input and output voltages of static and dynamic loads with an optimized light-load performance. It also includes modern voltage protection and low power dissipation. The UCC2813D-3 is optimized so that the included control loop can accurately establish the required output voltage and the maximum power output can be achieved by tuning the duty cycle upon measurement of the input voltage.The UCC2813D-3 operates with a switched-mode power supply (SMPS) controller. The SMPS is a power conversion system that uses switching of an electronic device to simultaneously achieve high frequency and low voltage, providing efficient voltage and current conversion.

Control Sequence of UCC2813D-3

The UCC2813D-3 is designed to operate using three distinct sequential steps. These steps include the startup sequence, normal operating sequence, and the shutdown sequence. The startup sequence begins with the input supply being turned on and the selectable start-up time delay begins. The Soft Start circuit then ramps up the output voltage from zero until it reaches the target voltage. During the startup process, the over-voltage protection circuit monitors the output and react by shutting down the startup process if the measured output voltage is too high. Once the startup sequence is complete, the UCC2813D-3 enters the normal operating sequence. During this time, the output voltage is monitored by the over-voltage protection circuit to ensure it remains within the predetermined values. In addition, the current-mode switch-mode-PWM control adjusts the duty cycle of pulses and the voltage loop tracks the output voltage to achieve the target output level.Finally, the shutdown sequence occurs when the input supply is turned off. During this process, the shutdown voltage protection circuit monitors the output to ensure the output voltage does not exceed the predetermined values. Once the over-voltage protection circuit detects that the output voltage is within the limit then the device enters a low-power state and finally turns off.

Conclusion

The UCC2813D-3 is an advanced power management integrated circuit from Texas Instruments. It is a switching controller used for controlling the input and output voltages of static and dynamic load applications. It is optimized for efficient light-load operations and its protection structure includes voltage protections and low power dissipation. It can be used for various applications ranging from audio amplifiers to automotive systems, and its operations are governed by the three control sequences: startup, normal operating and shutdown.

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