The UCC3813-x device family of high-speed, low-power integrated circuits contains all of the control and drive components required for off-line and DC-to-DC fixed-frequency current-mode switching power supplies with minimal parts count.

These devices have the same pin configuration as the UC384x device family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCC3813-x device family offers a variety of package options, temperature-range options, choice of maximum duty cycle, and choice of critical voltage levels. Devices with lower reference voltage such as the UCC3813-3 and UCC3813-5 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC3813-2 device and UCC3813-4 device make these ideal choices for use in off-line power supplies.

The UCC2813-x device series is specified for operation from –40°C to 85°C and the UCC3813-x device series is specified for operation from 0°C to 70°C.

• 100-μA typical starting supply current
• 500-μA typical operating supply current
• Operation 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 the UCC3802 device, UC3842 device, and UC3842A device families

• Topology
• Boost, Flyback, Forward
• Duty cycle (Max) (%)
• 100
• Supply voltage (Max) (V)
• 11
• UVLO thresholds on/off (V)
• 12.5/8.3
• Features
• Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Leading Edge Blanking, Multi-topology, Soft Start
• Operating temperature range (C)
• -40 to 85
• Rating
• Catalog
• Frequency (Max) (kHz)
• 1000
• Gate drive (Typ) (A)
• 1

UCC2813-2的完整型号有：UCC2813D-2、UCC2813DTR-2、UCC2813PW-2，以下是这些产品的关键参数及官网采购报价：

UCC2813D-2，工作温度：-40 to 85，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UCC2813D-2的批量USD价格：.829（1000+）

UCC2813DTR-2，工作温度：-40 to 85，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UCC2813DTR-2的批量USD价格：.691（1000+）

UCC2813PW-2，工作温度：-40 to 85，封装：TSSOP (PW)-8，包装数量MPQ：150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UCC2813PW-2的批量USD价格：.691（1000+）

UCCx813-2, UCCx802 Families PSpice Transient Model (Rev. B)

此设计可提供隔离的 5V（两个）、3.3V、2.5V 及 -5V 输出。对于噪声敏感应用（如医学成像和数据采集），所有输出均可采用低压降 (LDO) 线性稳压器进行噪声过滤。