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Phase-Shifted Full-Bridge Controller for Wide Input Voltage Range


Package | PIN: PW | 24
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $7.16
10-24 $6.44
25-99 $6.02
100-249 $5.40
250-499 $5.04
500-749 $4.38
750-999 $3.79
1000+ $3.72


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40ºC to +125ºC AmbientOperating Temperature Range
    • Device HBM ESD Classification LevelH2
    • Device CDM ESD Classification LevelC3B
  • Enhanced Zero-Voltage Switching (ZVS) Range
  • Direct Synchronous Rectifier (SR) Control
  • Light-Load Efficiency Management Including:
    • Burst ModeOperation
    • Discontinuous Conduction Mode (DCM), Dynamic SR On/Off Control WithProgrammable Threshold
    • Programmable AdaptiveDelay
  • 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
  • 150-µA Start-Up Current
  • VDD Undervoltage Lockout
  • Wide Temperature Range: –40°C to +125°C

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Texas Instruments  UCC28951QPWRQ1

The UCC28951-Q1 device is a new enhanced version of the UCC28950-Q1; it is a fullycompatible drop-in replacement for the UCC28950-Q1. Reference application noteMaking the Correct Choice: UCC28950-Q1or UCC28951-Q1 (SLUA853) for choosing the controller to best fit yourapplication. The UCC28951-Q1 implements advanced control of the full-bridge along with activecontrol of the synchronous rectifier (SR) output stage.

Programmable delays ensure ZVS operation over a wide range of operating conditions, whilethe load current naturally tunes the switching delays of the secondary-side SRs, maximizing overallsystem efficiency.

The UCC28951-Q1 offers multiple light-load management features including burst mode anddynamic SR on/off control when transitioning in and out of Discontinuous Current Mode (DCM)operation.

In addition, the UCC28951-Q1 includes support for current or voltage mode control.Programmable switching frequency up to 1 MHz and a wide set of protection features includingcycle-by-cycle current limit, UVLO, and thermal shutdown.

The UCC28951-Q1 is available in 24-pin TSSOP package and is RoHS compliant.