UCC28711DR

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UCC28711DR

IC OFFLINE SWITCH FLYBACK 7SOIC

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規格

Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
OutputIsolation Isolated
InternalSwitch(s) No
Topology Flyback
Voltage-StartUp 21 V
Voltage-Supply(Vcc/Vdd) 9V ~ 35V
Frequency-Switching 680Hz ~ 100kHz
FaultProtection Current Limiting, Over Voltage
OperatingTemperature -40°C ~ 125°C (TJ)
Package/Case 8-SOIC (0.154, 3.90mm Width), 7 Leads
SupplierDevicePackage 7-SOIC

概述

Description

UCC28711DR is TI’s primary-side-regulation (PSR) flyback controller in the UCC28711 family. It’s intended for isolated off‑line power supplies and adapters (such as USB chargers and LED drivers) and is designed to enable regulation without an optocoupler.
Key points:
- PSR: regulates the output by sensing the reflected voltage on the primary, simplifying the feedback network.
- Suitable for universal mains operation with a broad input range and high efficiency, especially at light loads.
- Built-in protection: overcurrent/short-circuit protection, overvoltage, undervoltage/UVLO, and thermal protection.
- Features to simplify design: soft-start, current limiting, and minimal external components for a compact flyback design.
- Packaging: DR suffix denotes a specific package variant from TI (an eight‑pin device in a RoHS‑compliant package).
Applications:
- Isolated offline flyback power supplies, wall‑wart adapters, USB chargers, and LED drivers (up to typical consumer power levels).
Note: For exact electrical specs, operating ranges, and the DR package details, consult the UCC28711DR datasheet.

Package

UCC28711DR comes in an 8-pin small-outline package (SOIC-8).

Pinout

- Pin count: 8 pins (UCC28711DR in an 8-pin package).
- Function: High-voltage flyback controller with primary-side regulation (PSR) and valley-switching capability; drives an external MOSFET in off-line AC-DC converters, with built-in protections.

Manufacturer

Texas Instruments Incorporated (TI) is the manufacturer of the UCC28711DR. TI is a multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits for various industries, headquartered in Dallas, Texas.

Application

Applications of UCC28711DR include:
- Off-line isolated flyback SMPS for 85–265 VAC inputs (wall-wart adapters, USB chargers)
- LED drivers and lighting power supplies
- Battery chargers and small consumer-electronics power bricks
- Telecom and industrial off-line power supplies
- Designs requiring high efficiency and low EMI via valley/quasi-resonant operation

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