UCC28250RGPR

Frequency - Switching:	85kHz ~ 1.15MHz
Base Part Number:	UCC28250
Supplier Device Package:	20-QFN (4x4)
Package / Case:	20-VFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Current Limit, Enable, Frequency Control, Ramp, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	4.7 V ~ 17 V
Output Phases:	1
Number of Outputs:	2
Topology:	Full-Bridge, Half-Bridge, Push-Pull
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Output Type:	PWM Signal
Part Status:	Active
Packaging:	Tape & Reel (TR)

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UCC28250RGPR Application Field and Working Principle

The UCC28250RGPR is a DC to DC switching controller specifically designed for synchronous buck converter applications. It is part of the Texas Instrument\'s family of synchronous buck converters. This device is capable of providing high efficiency, low cost, and low noise solutions for various AC-DC or DC-DC applications.

Application field

The UCC28250RGPR has been designed for use in power systems for applications that require a switch-mode DC/DC converter. This device is suitable for automotive, computer, telecom and a variety of other industrial power applications. It is particularly suitable for DC/DC converters that require a wide input voltage range and a high output current. It can also be used for a variety of power management applications, including automotive alternator and battery management as well as motor control.

Operation Principle

The UCC28250RGPR is a synchronous buck converter. A synchronous buck converter is a type of DC/DC converter that is typically used to convert a higher input voltage to a lower output voltage. It works by controlling two MOSFETs, one in the high-side and one in the low-side, to regulate the output voltage by toggling them back and forth in a synchronous manner.The UCC28250RGPR is a current-mode modulator and uses voltage mode to control the switching of the MOSFETs. The integrated circuitry is designed to sense the output current of the switching device and regulate its switching frequency. The regulator circuitry has a built-in differential amplifier to sense the voltage difference between the output voltage of the regulator and the target voltage. This differential amplifier then provides feedback to the current-mode modulator, which in turn adjusts the switching frequency of the MOSFETs to regulate the output voltage.The UCC28250RGPR also features protection measures such as thermal protection, under-voltage lockout, over-voltage protection, and over-current protection. It allows for programmable over-current limit and over-voltage protection.The UCC28250RGPR has a switching frequency of up to 2.125MHz, allowing for high efficiency and low noise solutions. Another feature is its built-in minimum on-time which eliminates the need for an external minimum-on time circuit. This helps reduce system cost and also eliminates the potential for instability.

Summary

The UCC28250RGPR is a DC/DC switching controller designed for synchronous buck converter applications. It can be used for a wide range of AC-DC or DC-DC switching applications, including automotive, computer and telecom, and industrial power applications. The device features high efficiency, low cost, and low noise operation. It is a current-mode modulator with voltage-mode control of the switching MOSFETs. It also includes various protection measures, allowing for programmable over-current limit and over-voltage protection. The UCC28250RGPR offers a maximum switching frequency of 2.125MHz and built-in minimum on-time circuitry.

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