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UCC28710DR

Name: UCC28710DR
Rating: 4.7 (12 reviews)

IC OFFLINE SWITCH FLYBACK 7SOIC

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製造商。部分 #UCC28710DR
包 SOIC (D)-7
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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

UCC28710DR is TI’s isolated flyback switching controller used in off‑line AC‑DC power supplies and adapters. It drives an external MOSFET and regulates output by sensing feedback from the secondary side (or via primary‑side techniques in certain designs), aiming for high efficiency with fast switching.
Key points:
- High‑voltage startup and energy‑efficient operation
- Current‑mode control with valley/quasi‑resonant switching options for improved efficiency
- Protection: overcurrent, overvoltage, thermal, short‑circuit detection; auto‑restart/hiccup behavior
- Adjustable switching frequency and soft‑start
- RoHS compliant, packaged in DR (tape & reel)
Typical uses:
- Isolated AC‑DC adapters, wall chargers, telecom/industrial power supplies, LED drivers
Why choose:
- Higher efficiency and lower standby power with fewer external components in many designs.

Features

Key features of UCC28710DR (TI):
- Quasi-resonant valley-switching flyback controller for high efficiency and low EMI
- Primary-Side Regulation (PSR) feedback option (no optocoupler required in some configurations)
- Universal AC input range (approx. 85–265 VAC) for offline adapters and LED drivers
- Integrated high-voltage startup current source
- Current-mode control with slope compensation
- Programmable/variable switching frequency with jitter; supports burst/eco modes for low standby power
- Protections: overvoltage, undervoltage, overcurrent/short-circuit with hiccup, over-temperature
- Soft-start and programmable current limit for reliable soft-start and short-circuit handling
- Suitable for flyback power supplies across a wide output range; optimized for low EMI and high efficiency
- Packaging: DR (Tape & Reel) version for automated assembly
Note: Always verify exact electrical specs (voltage, current limits, and modes) in the TI datasheet for your specific application.

Package

UCC28710DR is in an 8-pin small-outline package (SOIC-8), RoHS-compliant.

Pinout

- Pin count: 8 pins (SO-8 package, UCC28710DR).
- Function: Off-line primary-side flyback controller with an integrated high-voltage MOSFET for high-efficiency SMPS. It provides valley switching and current-mode control, startup/bias regulation, undervoltage lockout, and protection (OC/short). Typical pins include DRAIN (HV MOSFET drain), VCC, GND, CS (current sense), FB (feedback), COMP (error amplifier output), RT/CT (timing), and EN/SS (enable/soft-start).

Manufacturer

Manufacturer: Texas Instruments Incorporated (TI).
What kind of company: An American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits for a wide range of industries; publicly traded on NASDAQ (TXN).

Application

- Isolated offline flyback power supplies with primary-side regulation and valley switching
- AC-DC adapters and wall-wart chargers
- Power modules for TVs/monitors/set-top boxes and other consumer electronics
- Battery chargers, USB adapters, and LED-driver applications
- Telecom and industrial power supplies requiring high efficiency and EMI control

Equivalent

There isn’t a direct one‑to‑one equivalent for UCC28710DR. Closest non‑TI cross references are:
- ON Semiconductor NCP1250 / NCP1251 (primary‑side regulation flyback controllers)
- Richtek RT8250 / RT8251 (QR flyback controllers with primary‑side regulation)
Note: pinouts and HV/startup specifics differ; please verify datasheets and anticipate possible PCB/layout changes when substituting.