UCC2806QG3

Frequency - Switching:	47kHz
Base Part Number:	UCC2806
Supplier Device Package:	20-PLCC (9x9)
Package / Case:	20-LCC (J-Lead)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Enable, Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	50%
Series:	--
Voltage - Supply (Vcc/Vdd):	8 V ~ 14.5 V
Output Phases:	1
Number of Outputs:	2
Topology:	Boost, Flyback, Forward Converter
Output Configuration:	Positive, Isolation Capable
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tube

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Introduction
The UCC2806QG3 is a power management integrated circuit that is classified as a PMIC (Power Management Integrated Circuit) and more specifically as a DC-DC Switching Controller. It supports both buck and boost switched mode power supplies and an integrated internal synchronous rectification feature to maximize efficiency. The UCC2806QG3 is specifically designed for automotive applications, with its wide input voltage range of 4V to 45V, robust output protection features, and optimized switching characteristics. With its low power consumption and minimal external component count, the UCC2806QG3 provides a highly efficient and reliable solution for many car electronics applications.

Features
The UCC2806QG3 is a versatile DC-DC switching controller that offers a wide array of integrated features. It has numerous protection features, such as undervoltage lockout, overvoltage protection, overcurrent protection, and overtemperature shutdown. The UCC2806QG3 also has integrated features for frequency modulation and cycle-by-cycle current limiting. Other features include soft start, power-saving skip mode, and programmable current limit. The UCC2806QG3 also has an on-chip oscillator with an adjustable frequency range from 200 kHz to 500 kHz, making it ideal for applications that require precise frequency control.

Application Field
The UCC2806QG3 is ideally suited for car electronics applications that require a high level of efficiency and reliabiity. It supports both buck and boost configurations and is suitable for a variety of applications, including the following: car battery charger, LED backlight driver, automotive headlight power supply, voltage regulator, DC-DC converter, buck-boost converter, and many others. With its wide input voltage range, robust protection features, and integrated synchronous rectification, the UCC2806QG3 is an ideal solution for many automotive applications.

Working Principle
The UCC2806QG3 is a DC-DC switching controller that is designed with a flexible architecture that makes it suitable for both buck and boost configurations. Its main components are two switches, an on-chip oscillator, a voltage reference, and some additional comparators and gates. During operation, the oscillator creates a waveform with a certain frequency, which is then used to set the duty cycle of the two switches. The duty cycle sets the average voltage output. The UCC2806QG3’s synchronous rectification feature improves efficiency by minimizing losses due to the reverse recovery of the rectifier diode. The UCC2806QG3’s overvoltage protection and undervoltage protection features are there to protect the IC and the load from any high/low voltage malfunctions. This is done by sensing the amount of voltage and then either automatically decreasing or increasing the duty cycle (depending on whether the voltage is too high or too low).

Conclusion
The UCC2806QG3 is a highly versatile and efficient DC-DC switching controller that is specifically designed for automotive applications. It is well-suited for car battery formation, LED backlight driver, and many others. With its wide input voltage range, robust output protection features, and integrated synchronous rectification, the UCC2806QG3 provides a highly efficient and reliable solution for many automotive applications.

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