UCC28950-Q1 Full-Bridge Controller IC Chip

UCC28950-Q1（Phase- Shifted Full-Bridge Controller With Synchronous Rectification）

Introduction

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.

Feature

• 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 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
• 150μA Start-Up Current
• VDD Undervoltage I ockout
• Wide Temperature Range, -40°C to 125°C 

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