text.skipToContent text.skipToNavigation


Automotive 8V to 20V Full-Bridge, Phase-Shifted PWM Controller with Synchronous Rectification


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 Ambient
      Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C3B
  • Enhanced Wide-Range Resonant Zero-Voltage Switching (ZVS) Capability
  • Direct Synchronous Rectifier (SR) Control
  • Light-Load Efficiency Management Including
    • Burst Mode Operation
    • Discontinuous Conduction Mode (DCM), Dynamic SR On/Off Control
      With Programmable Threshold
    • Programmable Adaptive Delay
  • 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

Texas Instruments  UCC28950QPWRQ1

The UCC28950-Q1 enhanced phase-shifted controller builds upon Texas Instruments’ industry-standard UCCx895 phase-shifted controller family with enhancements that offer best-in-class efficiency in today’s high-performance power systems. The UCC28950-Q1 implements advanced control of the full bridge along with active control of the synchronous-rectifier output stage.

The primary-side signals allow programmable delays to ensure ZVS operation over wide load-current and input-voltage ranges, while the load current naturally tunes the secondary-side switching delays of the synchronous rectifiers, maximizing overall system efficiency.

The UCC28950-Q1 also offers multiple light-load management features, including burst mode and dynamic SR on/off control when transitioning in and out of discontinuous-current-mode (DCM) operation, ensuring ZVS operation is extended down to much lighter loads.

In addition, the UCC28950-Q1 includes support for peak current along with voltage-mode control, programmable switching frequency up to 1 MHz, and a wide set of protection features including cycle-by-cycle current limit, UVLO, and thermal shutdown. It is easy to arrange 90-degree phase-shifted interleaved synchronized operation between two converters.

The UCC28950-Q1 is available in a TSSOP-24 package.