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Product details

Parameters

Control method Primary-side regulation Duty cycle (Max) (%) 70 Frequency (Max) (kHz) 120 UVLO thresholds on/off (V) 14.5/8 Features PSR, CCM, DCM, HV Start-up Operating temperature range (C) -40 to 125 Rating Catalog open-in-new Find other Flyback controllers

Package | Pins | Size

SOIC (D) 7 29 mm² 4.9 x 6 open-in-new Find other Flyback controllers

Features

  • High-Power, Primary-Side CV/CC Regulation
  • Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) Operation
  • Built-In 700-V Start-Up Current Source
  • Active X-Capacitor Discharge (UCC28630 and UCC28633)
  • Adjustable Constant-Current (CC) Mode Limiting (except for UCC28630)
  • High Gate Drive Current 1-A Source and 2-A Sink
  • Low Power Modes for <30-mW System Standby
  • Best-In-Class Light Load (10%) Efficiency >85%
  • PSR design with no opto-coupler - can meet high CM isolation & surge requirements
  • VDD OVP for independent indirect output OV under open-feedback fault conditions
  • Peak-Power Mode for Transient Overload
  • Shutdown Pin Interface for External NTC
  • Protections: Overvoltage, Overcurrent, Over-Temperature, Overload Timer (UCC28630), AC Line UV, Brownout and Pin Protections
  • Frequency Dither to Ease EMI Compliance (except the UCC28632)
  • Create a Custom Design Using the UCC2863x With the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

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Description

The UCC2863x targets high-power, primary-side regulated flyback converters. The ability to operate in both CCM and DCM make the device suitable for applications with a wide power range. The peak power mode allows transient peak power delivery up to 200% of nominal rating, with only a 25% peak current increase, maximizing transformer utilization.

The transformer bias winding is used to sense output voltage for regulation, and for low-loss input voltage sensing. Advanced sampling techniques allow CCM operation, and deliver excellent output voltage regulation performance for opto-coupler-less designs at power levels of 100 W and above.

A high-voltage current source enables fast and efficient start-up. Advanced light-load modes are deployed to reduce both controller and system power consumption at no load and light load. These modes enable potential system designs to meet 30-mW no-load power for power designs up to 30 W nominal, 60 W peak.

The device has been designed for ease-of-use and incorporates many features to enable a wide range of designs. Extensive protection features are included to simplify system design.

See the Device Comparison Table for details.

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Technical documentation

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Type Title Date
* Datasheet UCC2863x, High-Power Flyback Controller with Primary-Side Regulation and Peak-Power Mode datasheet (Rev. D) Dec. 15, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
UCC28630 Evaluation Module
UCC28630EVM-572
document-generic User guide
99
Description

The Texas Instruments UCC28630EVM-572 evaluation module (EVM) is a 65W primary side regulated (PSR) flyback converter for offline applications, with 130W transient surge capability. It is intended for evaluation purposes and is not intended to be an end product.

Features
  • Transient peak power capability of 200% of nominal output power
  • Primary Side Regulation (PSR) eliminates opto-coupler
  • Active X-cap discharge for no-load power reduction.
  • +/- 1% Voltage regulation
  • +/- 7.5% Constant Current Regulation (7A nominal)
  • No audible noise.
  • Protection Functions: Output Over Voltage (...)

Design tools & simulation

SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOLS Download
SLUC537D.ZIP (177 KB)
CALCULATION TOOLS Download
SLUC538B.ZIP (511 KB)

Reference designs

REFERENCE DESIGNS Download
European Input Voltage Range to 24V@2.5A Primary Side Regulated Isolated Flyback Reference Design
PMP11753 — A quasi-resonant primary-side regulated isolated Flyback is used to provide 24V industrial voltage at 1.9A average (2.5Apeak) on secondary side and 24V @ 300mA on primary side from an AC input voltage of 170Vac-264Vac. The converter does not employ any optocoupler and regulates both output voltages (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
24V 65W Nominal 130W Surge Offline Flyback Power Supply for Industrial Rails Reference Design
PMP9643 24V Output, Constant Voltage / Constant Current, 65W Flyback power supply with 130W surge capability. Primary side regulation eliminates feedback opto-coupler and provides 1% regulation down to no-load. Average efficiency of > 89% and no load power of < 70mW are achieved. Voltage input range (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
65W (130W Surge) Flyback Power Supply for Laptop Adapter Apps w/85-265VAC Input Reference Design
PMP9208 The PMP9208 is a power adapter reference design for 19.5V output, constant voltage / constant current, 65W flyback power supply with 130W surge capability. Primary side regulation eliminates feedback opto-coupler and provides 1% regulation down to no-load. Average efficiency of > 89% and no load (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (D) 7 View options

Ordering & quality

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