●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.
● 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
Part 3D Model
