The UCC28089 is a versatile BiCMOS controller for dc-to-dc or off-line fixed-frequency switching power supplies. The UCC28089 has dual alternating output stages in dual-alternating push-pull configuration. Both outputs switch at half the oscillator frequency using a toggle flip-flop and duty cycle is limited to less than 50%.

The UCC28089 is optimized for use as the primary-side companion controller for a cascaded converter that has secondary-side control. The device incorporates dead-time programming. The synchronization output also provides dead-time information. The retry and soft-start duration scales with the oscillator clock frequency for high performance fault recovery.

The UCC28089 also provides primary side under-voltage protection (UVLO), and over-current protection. Both the soft start and retry after fault durations scale with oscillator frequency for high performance. The turn-on/off UVLO thresholds are 10.5 V/8.0 V.

• Push-Pull Oscillator With Programmable Deadtime
• High-Current Totem-Pole Dual Output Stage Drives Push-Pull Configuration with 1-A Sink and 0.5-A Source Capability
• Can be Used in Push-Pull, Half-Bridge, or Full-Bridge Topologies
• Oscillator Synchronization Output
• Low Start-Up Current of 130 A and 1.4-mA Typical Run Current
• Over-Current Shutdown
• Digitally Controlled Over-Current/Retry Feature
• Undervoltage Lockout With Hysteresis
• APPLICATIONS
  • High Efficiency Cascaded Converters
  • Inverters
  • Electronic Ballasts
  • Uninterruptable Power Supplies (UPS)
  • AC or DC Links

• Topology
• Full-Bridge, Half-Bridge, Push-Pull
• Duty cycle (Max) (%)
• 50
• Supply voltage (Max) (V)
• 14
• UVLO thresholds on/off (V)
• 10.5/8.0
• Features
• Dead Time Control, Soft Start, Synchronization Pin
• Operating temperature range (C)
• -40 to 105
• Rating
• Catalog
• Frequency (Max) (kHz)
• 1000
• Gate drive (Typ) (A)
• 1

UCC28089的完整型号有：UCC28089D、UCC28089DR，以下是这些产品的关键参数及官网采购报价：

UCC28089D，工作温度：-40 to 105，封装：SOIC (D)-8，包装数量MPQ：75个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC28089D的批量USD价格：1.008（1000+）

UCC28089DR，工作温度：-40 to 105，封装：SOIC (D)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC28089DR的批量USD价格：.84（1000+）