Current Mode PWM Controller/Voltage Mode PWM Controller 50kHz to 1000kHz 24-Pin TSSOP T/R Automotive AEC-Q100


  • 90-day after-sales guarantee
  • 365 Days Quality Guarantee
  • Genuine Product Guarantee
  • 7*24 hours service quarantee

Quick Inquiry

Please submit RFQ for UCC28950QPWRQ1 or email to us: Email: [email protected], we will contact you in 12 hours.

Overview of 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.


Key Features

  • 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


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Topology Phase-shifted full bridge Control mode Current
Duty cycle (max) (%) 97 Switching frequency (max) (kHz) 1000
Features Adjustable switching frequency, Current limiting, Error amplifier, Light-load efficiency, SR logic, Soft start, Soft switching UVLO thresholds on/off (V) 7.3/6.7
Operating temperature range (°C) -40 to 105, -40 to 125 Rating Automotive
Gate drive (typ) (A) 0.2 Vin (max) (V) 17

Warranty & Returns

Warranty, Returns, and Additional Information

  • QA & Return Policy

    Parts Quality Guarantee: 365 days

    Returns for refund: within 90 days

    Returns for Exchange: within 90 days

  • Shipping and Package

    Shipping:For example, FedEx, SF, UPS, or DHL.UPS, or DHL.

    Parts Packaging Guarantee: Featuring 100% ESD anti-static protection, our packaging incorporates high toughness and superior buffering capabilities.

  • Payment

    For example, channels like VISA, MasterCard, UnionPay, Western Union, PayPal, and more.

    If you have specific payment channel preferences or requirements, please get in touch with our sales team for assistance.