UCC28250

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Advanced half-bridge/full-bridge PWM controller with pre-bias operation

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Product details

Parameters

Topology Forward, Full-Bridge, Half-Bridge, Push-Pull Control method Current, Voltage VCC (Min) (V) 4.7 VCC (Max) (V) 17 Duty cycle (Max) (%) 100 UVLO thresholds on/off (V) 4.3/4.1 Frequency (Max) (kHz) 1000 Operating temperature range (C) -40 to 125 Gate drive (Typ) (A) 0.2 Features Current Limiting, HV Start-up, SR Logic Rating Catalog open-in-new Find other PWM controllers & resonant controllers

Package | Pins | Size

TSSOP (PW) 20 42 mm² 6.5 x 6.4 VQFN (RGP) 20 16 mm² 4 x 4 open-in-new Find other PWM controllers & resonant controllers

Features

  • Prebiased Start-up
  • Synchronous Rectifier Control Outputs With Programmable Delays (Including Zero Delay Support)
  • Voltage Mode Control With Input Voltage Feed-Forward or Current Mode Control
  • Primary or Secondary-Side Control
  • 3.3-V, 1.5% Accurate Reference Output
  • 1-MHz Capable Switching Frequency
  • 1% Accurate Cycle-by-Cycle Overcurrent Protection with Matched Duty Cycle Outputs
  • Programmable Soft-Start and Hiccup Restart Timer
  • Thermally Enhanced 4-mm × 4-mm QFN-20 Package and 20-pin TSSOP Package

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Description

The UCC28250 PWM controller is designed for high power density applications that may have stringent prebiased start-up requirements. The integrated synchronous rectifier control outputs target high-efficiency and high-performance topologies such as half-bridge, full-bridge, interleaved forward, and push-pull. The UCC27200 half-bridge drivers and UCC2732X MOSFET drivers used in conjunction with the UCC28250 provide a complete power converter solution.

Externally programmable soft-start, used in conjunction with an internal prebiased start-up circuit, allows the controller to gradually reach a steady-state operating point under all output conditions. The UCC28250 can be configured for primary or secondary-side control and either voltage or current mode control can be implemented.

The oscillator operates at frequencies up to 2 MHz, and can be synchronized to an external clock. Input voltage feedforward, cycle-by-cycle current limit, and a programmable hiccup timer allow the system to stay within a safe operation range. Input voltage, output voltage and temperature protection can be implemented. Dead time between primary-side switch and secondary-side synchronous rectifiers can be independently programmed.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet UCC28250 Advanced PWM Controller With Prebias Operation datasheet (Rev. D) Jun. 28, 2015
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application notes Differences Between the UCC28251 and UCC28250 and Evaluation of the UCC28251 in (Rev. A) Feb. 15, 2013
Technical articles Introducing TI’s new Power Solution Video Series Apr. 19, 2012
User guides Using the UCC28250EVM-564 (Rev. A) Oct. 07, 2011
User guides Using the UCC28250EVM-501 Half Bridge DC-DC Converter with Primary Side Control (Rev. B) Dec. 07, 2010
Application notes Designing UCC28250 as a Secondary Side Control with a Pre-Bias Condition Nov. 24, 2010

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
99
Description
The UCC28250EVM-501 is a fully assembled and tested circuit for evaluating the UCC28250 Advanced PWM Controller with Pre-Bias Operation. The UCC28250EVM-501 comprises a symmetrical half-bridge DC/DC converter, which converts a 36V to 72V DC input to a 3.3V DC output with a maximum 75W output power.
Features
  • Pre-biased Startup
  • Synchronous Rectifier Control Outputs with Programmable Delays (Including Zero Delay Support)
  • Voltage Mode Control with Input Voltage Feed-Forward or Current Mode Control
  • Primary or Secondary-Side Control
  • 3.3-V, 1.5% Accurate Reference Output
  • 1-MHz Capable Switching Frequency
  • 1 (...)
EVALUATION BOARDS Download
document-generic User guide
99
Description
The UCC28250EVM-564 is a fully assembled and tested circuit for evaluating the UCC28250 Advanced PWM Controller with Pre-Bias Operation. The UCC28250EVM-564 comprises a symmetrical half bridge DC-DC converter which converts a 36V to 75V DC input to a 3.3V DC output with 100W maximum output power.
Features
  • Pre-biased Startup
  • Synchronous Rectifier Control Outputs with Programmable Delays (Including Zero Delay Support)
  • Voltage Mode Control with Input Voltage Feed-Forward or Current Mode Control
  • Primary or Secondary-Side Control
  • 3.3-V, 1.5% Accurate Reference Output
  • 1-MHz Capable Switching Frequency
  • 1 (...)

Design tools & simulation

SIMULATION MODELS Download
SLUM171A.ZIP (96 KB) - PSpice Model
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
SLUC260.ZIP (61 KB)

Reference designs

REFERENCE DESIGNS Download
1/8 Brick Isolated DC/DC Telecom Power Module Reference Design
PMP8878 PMP8878 is a full-function 1/8th brick isolated DC/DC telecom power module based on UCC28250 advanced PWM controller. The reference design features secondary side control and hard switching full bridge power topology to deliver 12V/180W of output power operating across a wide range 40V-75V input (...)
document-generic Schematic document-generic User guide
Design files

CAD/CAE symbols

Package Pins Download
QFN (RGP) 20 View options
TSSOP (PW) 20 View options

Ordering & quality

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