The UCC280x family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies with minimal parts count.

These devices have the same pin configuration as the UCx84x family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

• 100-A typical starting supply current
• 500-A typical operating supply current
• Operation up to 1 MHz
• Internal soft start
• Internal fault soft start
• Internal leading-edge blanking of the current sense signal
• 1-A totem-pole output
• 70-ns typical response from current-sense to gate drive output
• 1.5% tolerance voltage reference
• Same pinout as UC3842 and UC3842A

• Topology
• Flyback, Boost,
• Duty cycle (Max) (%)
• 100
• Supply voltage (Max) (V)
• 12
• UVLO thresholds on/off (V)
• 4.1/3.6
• Features
• Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Multi-topology, Soft Start
• Operating temperature range (C)
• 0 to 70
• Rating
• Catalog
• Frequency (Max) (kHz)
• 1000
• Gate drive (Typ) (A)
• 1

UCC3803的完整型号有：UCC3803D、UCC3803DTR、UCC3803PWTR，以下是这些产品的关键参数及官网采购报价：

UCC3803D，工作温度：0 to 70，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UCC3803D的批量USD价格：.96（1000+）

UCC3803DTR，工作温度：0 to 70，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UCC3803DTR的批量USD价格：.8（1000+）

UCC3803PWTR，工作温度：0 to 70，封装：TSSOP (PW)-8，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UCC3803PWTR的批量USD价格：.96（1000+）