UCC25630-2DDBR

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UCC25630-2DDBR

+Nomenclature

UCC25630-2DDBR

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Spécifications

Attribut Valeur
Supplier Texas Instruments
Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
OutputType Transistor Driver
OutputConfiguration Positive, Isolation Capable
Topology Half-Bridge
NumberofOutputs 1
OutputPhases 1
Voltage-Supply(Vcc/Vdd) 13V ~ 26V
Frequency-Switching 35kHz ~ 1MHz
DutyCycle(Max) 50%
SynchronousRectifier No
ClockSync No
ControlFeatures Hybrid Hysteretic Control (HHC)
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Surface Mount
Package/Case 16-SOIC (0.154, 3.90mm Width), 14 Leads

Présentation

Description

The UCC25630-2DDBR is TI’s high-efficiency valley-switching flyback controller for isolated offline power supplies. It drives an external MOSFET and uses current‑mode regulation with fixed-frequency operation, enhanced by valley switching to reduce switching losses across the load range. The device provides startup and Vcc regulation, soft-start, and comprehensive protection (overcurrent, overvoltage, undervoltage lockout, and thermal shutdown) to improve reliability and efficiency. It is suited for offline AC‑DC adapters, motor/battery chargers, telecom and industrial power supplies, and LED drivers where high efficiency is important. The “-DDBR” suffix denotes a specific packaging/reel option from TI (tape-and-reel). For exact electrical specs, pinout, and design guidelines, consult the TI UCC25630 datasheet and product page.

Features

Here are the key features of UCC25630-2DDBR (primary-side regulation, QR flyback controller):
- Quasi-resonant valley-switching flyback with primary-side regulation (PSR) for regulation without opto-coupler
- Integrated high-voltage MOSFET (offline operation)
- Current-mode control with valley switching for low switching losses
- Protections: undervoltage lockout (UVLO), overcurrent/short-circuit with hiccup (or auto-restart), overtemperature, and fault protection
- Soft-start to limit inrush and reduce output overshoot
- Programmable/flexible switching frequency within QR operation
- Line sensing/compensation for stable regulation over input variation
- Enable/disable control and compact 8-pin D²BR packaging
Applications include offline adapters, battery chargers, LED drivers, and other isolated SMPS where high efficiency and reduced component count are desired.

Pinout

- Pin count: 8 pins (package: -DDBR, typical MSOP-8/SO-8 form).
- Function: UCC25630-2DDBR is a high-voltage, primary-side regulated flyback controller. It provides startup current from the HV rail, drives an external MOSFET (via DRAIN and GATE), and regulates output by sensing primary current (IS) and feedback (FB). It includes an oscillator (RT/CT) for timing and protections (UVLO/OVP). Used for isolated offline flyback power supplies.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- What kind of company: American multinational semiconductor company that designs and manufactures ICs (analog, power management, embedded processing, etc.), headquartered in Dallas, Texas.

Application

UCC25630-2DDBR is a high-voltage, integrated MOSFET, primary-side regulated flyback controller. Common application areas:
- Isolated off-line flyback power supplies: AC-DC adapters and USB chargers (wall warts)
- Isolated LED driver circuits
- Standby/auxiliary rails for consumer electronics (set-top boxes, modems, routers)
- Telecom and small-to-mid power isolated power supplies in industrial equipment
It supports efficient valley switching and PSR, enabling compact, low‑EMI, cost‑effective flyback converters.

Package

It’s an 8-pin Small Outline Integrated Circuit (SOIC) package (RoHS). Tape-and-reel packaging is used for the -DDBR variant.

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