Texas Instruments UCC28701DBVT

Mfr. Part

UCC28701DBVT

Manufacturer

Texas Instruments (Luminary Micro/TI). Y-IC is a quality distributor of Texas Instruments. We deliver genuine parts, fast service, and strong technical support so you get the best products and the best experience.

Detailed Description

Primary-side regulated flyback controller for AC‑DC power supplies using an external MOSFET. Delivers constant-voltage and constant-current control without an optocoupler, supports isolated outputs, and minimizes standby power. Small SOT‑23‑6 package for compact designs.

Key Features

Primary-side regulation for CV and CC control (no optocoupler needed)

Wide VDD operating range 9 V to 35 V, start-up around 21 V

Valley switching and frequency modulation to reduce losses and improve efficiency

Switching frequency range approximately 1 kHz to 130 kHz

External MOSFET drive (controller only; no internal switch)

Integrated protection: cycle-by-cycle current limit, output over-voltage, line undervoltage/brownout

Designed for isolated flyback topologies

ROHS3 compliant; lead-free

Key Advantages

Fewer external parts and no optocoupler reduce BOM cost and simplify design

Low standby power helps meet ErP/DOE energy-efficiency requirements

Small SOT‑23‑6 footprint saves PCB area

Stable CV/CC regulation ideal for chargers and adapters

Supports universal AC input designs (85–265 VAC) with robust protection

Proven TI platform with strong documentation and ecosystem

Packaging

Type: Tape & Reel (TR) for automated assembly

Package / Case: SOT‑23‑6 plastic, surface-mount

Supplier Device Package: SOT‑23‑6

Size: compact SOT‑23‑6 body (approx. 2.9 mm x 1.6 mm x 1.1 mm); 6 leads

Pin configuration: 6-pin controller typical functions include VDD, GND, drive output (to MOSFET gate), sense pins (CS/VS)

Thermal characteristics: junction operating temperature −20°C to +125°C (TJ); thermal resistance depends on PCB copper and layout

Electrical properties: VDD supply 9–35 V; start-up ~21 V; switching frequency ~1 kHz to 130 kHz; flyback topology; isolated output; internal switch: none

Mounting Type: Surface Mount

RoHS: ROHS3 Compliant

Stock status: 2350 units available (subject to change)

Lifecycle

Current status: Active. Not near discontinuation based on TI information available as of 2024.

Base Product Number: UCC28701

Equivalent or alternative models:

- Texas Instruments: UCC28700 (similar family), UCC28702, UCC28703, UCC28704 (adds high-voltage start-up), UCC28705

- onsemi: NCP1207A, NCP1230, NCP1250 (offline flyback controllers; functional alternatives, not pin-compatible)

- Power Integrations: TinySwitch-4, LinkSwitch-TN2 (integrated switch solutions; different architecture and footprint)

Important: Verify electrical limits, control method, and pinout before substitution. For closer drop-in or functional matches, contact our Y-IC sales team via our website for tailored recommendations.

Key Application Areas

USB wall chargers and mobile device adapters

Auxiliary supplies in appliances, industrial controllers, and networking gear

Set-top boxes and consumer electronics standby supplies

Smart meters, IoT hubs, and home automation power modules

LED lighting drivers using isolated flyback topologies

General-purpose lowto mid-power AC‑DC converters

Datasheet

Y-IC provides the most authoritative and up-to-date datasheet for UCC28701DBVT. Download it on this page to get complete electrical characteristics, design equations, reference schematics, and application guidance.

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