UCC28220PWG4

Frequency - Switching:	200kHz ~ 2MHz
Base Part Number:	UCC28220
Supplier Device Package:	16-TSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Operating Temperature:	-40°C ~ 105°C (TA)
Control Features:	Ramp, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	75%
Series:	--
Voltage - Supply (Vcc/Vdd):	8.4 V ~ 14.5 V
Output Phases:	1
Number of Outputs:	2
Topology:	Flyback, Forward Converter
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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UCC28220PWG4 Application field and Working principle

The UCC28220PWG4 is a device designed to control DC-DC converters, used primarily in power management applications. It is a high-efficiency, energy-saving switch mode converter IC that can convert input voltages to the output voltage required by the application. The device is mainly used in applications such as power management tools, microprocessors and ASICs, voltage regulators, and automotive systems.

Introduction to UCC28220PWG4

The UCC28220PWG4 is a high-speed DC-DC voltage regulator that can convert input voltages to the output voltage required by the application. It features a wide input range from 3.0V to 45V, a low internal quiescent current (Iq = 2.4 mA max), and a 0.4V to 60V output voltage range with a output efficiency up to 90%, making it suitable for a vast range of applications. It also has a wide turn-on and turn-off range, up to 90% with a minimum hysteresis of 0.65V.The device is designed to provide a wide output voltage range of 0.4V to 60V, with a maximum load current of 2A. It features a current-mode control scheme with a reference voltage of 2.12V and a power good pin for indicating when the output voltage is within its specified range. Other features include a short-circuit protection, fault indication, thermal protection, and a power good signal.

Working Principle of UCC28220PWG4

The UCC28220PWG4 is a pulse-width modulated (PWM) DC-DC converter that features current-mode control. It operates with a power switch and a hysteretic current control circuit. When the output voltage drops below the desired level, the hysteretic current control activates the power switch, creating a circuit that continuously adjusts the output voltage. The converter produces a pulse-width modulated (PWM) signal, which is a square wave with variable duty cycle. The square wave controls the output voltage of the converter through a series of pulses, with each cycle having a adjustable duty cycle. The duty cycle can be adjusted in order to regulate the output voltage of the converter to that desired by the application. The PWM duty cycle is controlled by an internal oscillator, which is referenced to the sensed output voltage through an error amplifier. An internal circuit senses when the output voltage reaches an error limit, and the duty cycle is then adjusted to compensate for the change. The pulsed output of the converter is smoothed and filtered to produce the desired regulated output voltage.

Applications of UCC28220PWG4

The UCC28220PWG4 is ideally suited for applications requiring a wide range of input voltages and output voltages. It is commonly used in power management tools, microprocessors and ASICs, voltage regulators, automotive systems, and other applications requiring a regulated output voltage.For example, the UCC28220PWG4 can be used in automotive applications such as power steering, fuel injection, anti-lock brakes, and climate control systems. It can also be used to power devices such as cellular phones, laptop computers, and digital cameras. Due to its wide operating range and high efficiency, it can be used in a variety of applications where a regulated output voltage is required.

Conclusion

The UCC28220PWG4 is an integrated DC-DC converter with a wide range of applications. It is designed to provide a wide output voltage range with high efficiency and a low quiescent current, making it ideal for power management tools, microprocessors, voltage regulators, and automotive systems, among many other applications. The device utilizes a current-mode control method with an oscillator-based duty-cycle control system, allowing for a variable duty cycle control to regulate the output voltage. Its wide operating range, high efficiency, and low Iq make the UCC28220PWG4 a suitable choice for applications needing a regulated output voltage.

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