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UCC28250RGPR

Name: UCC28250RGPR
Rating: 4.7 (12 reviews)

IC REG CTRLR MULT TOPOLOGY 20QFN

製造商
製造商。部分 #UCC28250RGPR
包 20-VFQFN Exposed Pad
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規格

Supplier	Texas Instruments,Rochester Electronics, LLC
Package	Tape & Reel (TR),Cut Tape (CT),Bulk
ProductStatus	Active
OutputType	PWM Signal
Function	Step-Up/Step-Down
OutputConfiguration	Positive
Topology	Full-Bridge, Half-Bridge, Push-Pull
NumberofOutputs	2
OutputPhases	1
Voltage-Supply(Vcc/Vdd)	4.7V ~ 17V
Frequency-Switching	85kHz ~ 1.15MHz
SynchronousRectifier	Yes
ClockSync	No
ControlFeatures	Current Limit, Enable, Frequency Control, Ramp, Soft Start
OperatingTemperature	-40°C ~ 125°C (TJ)
MountingType	Surface Mount
Package/Case	20-VFQFN Exposed Pad

概述

Description

Introduction to UCC28250RGPR
- What it is: A Texas Instruments switch‑mode power-supply (SMPS) controller IC used to drive an external MOSFET in isolated DC‑DC converters (commonly flyback/forward topologies).
- Function: Fixed‑frequency, peak‑current‑mode PWM controller with built‑in protection and gate drive for the external MOSFET.
- Key features (typical): startup/UVLO, overcurrent/short‑circuit protection, soft‑start, and feedback‑driven duty cycle control.
- Packaging: The RGPR suffix indicates RoHS‑compliant, lead‑free, tape‑and‑reel packaging.
- Applications: AC‑DC adapters, standby power supplies, LED drivers, and other compact isolated power supplies.
- How it’s used: The controller compares the sensed switching current with the error/feedback signal to regulate output voltage, driving the external MOSFET accordingly.
- Note: For exact electrical specs (input range, frequency, protection thresholds), refer to the UCC28250 datasheet.

Features

Key features of UCC28250RGPR (TI)
- Primary‑side regulation (PSR) for flyback regulation without opto-coupler.
- Valley/soft-switching approach to reduce switching losses and EMI.
- Fixed-frequency, current-mode control with slope compensation.
- Wide input/high-voltage startup capability (integrated startup circuit).
- Programmable switching frequency via RT/CT network (typical tens of kHz range).
- Robust protections: overcurrent/short‑circuit, overvoltage, and thermal shutdown; UVLO.
- Soft-start to limit inrush and output overshoot; latch/hiccup restart on faults.
- Gate-drive output for external MOSFET with solid drive current.
- Enable/shutdown input for easy control.
- 8-pin package (RGPR) suitable for compact, islanded flyback designs.
Note: exact voltage ranges and timing specs are in the datasheet; this summarizes typical features of the UCC28250 family.

Package

UCC28250RGPR is an 8-pin MSOP package (MSOP-8), RoHS-compliant.

Pinout

- Pin count: 8 pins (8-pin package, e.g., SOIC/DIP).
- Function: PWM controller for offline flyback converters (primary-side regulation) that drives an external high-voltage switch; provides current‑mode control with protections (UVLO, current limit, soft-start, etc.) to regulate SMPS output.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- What kind of company: A global American semiconductor company that designs and manufactures analog and embedded processing integrated circuits; publicly traded (NASDAQ: TXN), headquartered in Dallas, Texas.

Application

Applications of UCC28250RGPR:
- Off-line flyback switch-mode power supplies with universal input (85–265 VAC)
- Isolated DC-DC converters for telecom, datacom, and industrial equipment
- Compact, high-efficiency AC–DC adapters and chargers; valley-switching aids EMI and efficiency targets