Home Power management AC/DC & DC/DC controllers (external FET)
Home
Power management
AC/DC & DC/DC controllers (external FET)

UCC28950-Q1

ACTIVE

Automotive 8V to 20V full-bridge, phase-shifted PWM controller with synchronous rectification

Order now
Data sheet

UCC28950-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Topology Phase-shifted full bridge Vin (max) (V) 17 Control mode Current Features Adjustable switching frequency, Current limiting, Error amplifier, Light-load efficiency, SR logic, Soft start, Soft switching Operating temperature range (°C) -40 to 125 Duty cycle (max) (%) 97
Rating Automotive Topology Phase-shifted full bridge Vin (max) (V) 17 Control mode Current Features Adjustable switching frequency, Current limiting, Error amplifier, Light-load efficiency, SR logic, Soft start, Soft switching Operating temperature range (°C) -40 to 125 Duty cycle (max) (%) 97
TSSOP (PW) 24 49.92 mm² 7.8 x 6.4
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level H2
    • Device CDM ESD classification level C3B
  • Enhanced zero-voltage switching (ZVS) range
  • Direct synchronous rectifier (SR) control
  • Light-load efficiency management including:
    • Burst mode operation
    • Discontinuous conduction mode (DCM), dynamic SR on/off control
  • Average- or peak-current mode control with programmable slope compensation and voltage-mode control
  • Closed-loop soft-start and enable function
  • Programmable switching frequency up to 1 MHz with bidirectional synchronization
  • (±3%) cycle-by-cycle current limit protection with hiccup mode support
  • 150µA start-up current
  • VDD undervoltage lockout
  • Wide temperature range: –40°C to +125°C
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature range
    • Device HBM ESD classification level H2
    • Device CDM ESD classification level C3B
  • Enhanced zero-voltage switching (ZVS) range
  • Direct synchronous rectifier (SR) control
  • Light-load efficiency management including:
    • Burst mode operation
    • Discontinuous conduction mode (DCM), dynamic SR on/off control
  • Average- or peak-current mode control with programmable slope compensation and voltage-mode control
  • Closed-loop soft-start and enable function
  • Programmable switching frequency up to 1 MHz with bidirectional synchronization
  • (±3%) cycle-by-cycle current limit protection with hiccup mode support
  • 150µA start-up current
  • VDD undervoltage lockout
  • Wide temperature range: –40°C to +125°C

The UCC28951-Q1 controller is an enhanced version of the UCC28950-Q1. It is a fully compatible drop-in replacement for the UCC28950-Q1. Refer to application note Making the Correct Choice: UCC28950-Q1 or UCC28951-Q1 to determine which controller to use.The UCC2895x-Q1 devices use advanced control of the full-bridge in addition to active control of the synchronous rectifier (SR) output stage.

ZVS operation ensured over a wide range of operating conditions, while the load current naturally tunes the switching delays of the secondary-side synchronous rectifiers(SR). This functionality maximizes overall system efficiency.

Easily get started with the UCC2895x-Q1 600W phase shifted full bridge design review/application note,

The 24-pin, TSSOP package complies with RoHS requirements.

The UCC28951-Q1 controller is an enhanced version of the UCC28950-Q1. It is a fully compatible drop-in replacement for the UCC28950-Q1. Refer to application note Making the Correct Choice: UCC28950-Q1 or UCC28951-Q1 to determine which controller to use.The UCC2895x-Q1 devices use advanced control of the full-bridge in addition to active control of the synchronous rectifier (SR) output stage.

ZVS operation ensured over a wide range of operating conditions, while the load current naturally tunes the switching delays of the secondary-side synchronous rectifiers(SR). This functionality maximizes overall system efficiency.

Easily get started with the UCC2895x-Q1 600W phase shifted full bridge design review/application note,

The 24-pin, TSSOP package complies with RoHS requirements.
filter Find other AC/DC & DC/DC controllers (external FET)
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device
UCC28951-Q1 ACTIVE Automotive green phase-shifted full-bridge controller with SR control for wide input voltage range This product is a performance improvement over UCC28019.

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 5
Type Title Date
* Data sheet UCC2895x-Q1 Automotive Phase-Shifted Full-Bridge Controller for Wide-Input Voltage Range Applications datasheet (Rev. C) PDF | HTML 17 Oct 2024
Application note UCC28950 600W Phase Shifted Full Bridge Design Review/Application Report (Rev. D) PDF | HTML 04 Mar 2022
Application note Making the Correct Choice: UCC28950-Q1 or UCC28951-Q1 13 Nov 2017
More literature Design review of a 2-kW parallelable power supply module 17 Aug 2016
More literature Design review of a 2-kW parallelable power supply module (PPT) 17 Aug 2016

Design & development

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

Evaluation board

UCC28950EVM-442 — UCC28950 600-W, Phase-Shifted, Full-Bridge Converter Evaluation Module

The UCC28950EVM-442 is a 600-W phase-shifted full-bridge converter that converts a 370 V to 410-V DC input to a regulated 12-V output. This converter was designed to maintain ZVS down to 50% load. This 600-W EVM was designed to demonstrate how the UCC28950 control device could be used in (...)

User guide: PDF
Not available on TI.com
Calculation tool

SLUC210 — UCC28950 MathCAD Design Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
  • UCC28950 — Green phase-shifted full-bridge controller with Synchronous Rectification control
  • UCC28950-Q1 — Automotive 8V to 20V full-bridge, phase-shifted PWM controller with synchronous rectification
Download
Calculation tool

SLUC222 — UCC2895x Excel Design Tool

Excel based calculator to design a PSFB power supply
Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
  • UCC28950 — Green phase-shifted full-bridge controller with Synchronous Rectification control
  • UCC28950-Q1 — Automotive 8V to 20V full-bridge, phase-shifted PWM controller with synchronous rectification
  • UCC28951 — Green phase-shifted full-bridge controller with SR control for Wide input voltage Range
  • UCC28951-Q1 — Automotive green phase-shifted full-bridge controller with SR control for wide input voltage range
Hardware development
Evaluation board
  • UCC28950EVM-442 — UCC28950 600-W, Phase-Shifted, Full-Bridge Converter Evaluation Module
Download
Package Pins CAD symbols, footprints & 3D models
TSSOP (PW) 24 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos