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
• Flyback, Boost,
• Duty cycle (Max) (%)
• 50
• Supply voltage (Max) (V)
• 12
• UVLO thresholds on/off (V)
• 9.4/7.4
• Features
• Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Leading Edge Blanking, Multi-topology, Soft Start
• Operating temperature range (C)
• 0 to 70
• Rating
• Catalog
• Frequency (Max) (kHz)
• 1000
• Gate drive (Typ) (A)
• 1

UCC3813-1的完整型号有：UCC3813D-1、UCC3813DTR-1、UCC3813PW-1，以下是这些产品的关键参数及官网采购报价：

UCC3813D-1，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UCC3813D-1的批量USD价格：.829（1000+）

UCC3813DTR-1，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UCC3813DTR-1的批量USD价格：.691（1000+）

UCC3813PW-1，工作温度：0 to 70，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UCC3813PW-1的批量USD价格：.691（1000+）

UCCx813-1, UCCx801 Families PSpice Transient Model (Rev. B)

此直流/直流电源转换器参考设计展示了一种用于实现备用电池应用的新方法。在正常运行期间，转换器使用与锂离子电池兼容的 CC-CV 充分充电算法对电池进行充电器。当失去直流总线电源时，转换器会立即切换到备用电源，以便为系统无缝供电。当直流总线电源恢复之后，转换器会自动切换回电池充电模式。电池电压可能会高于或低于直流总线电压。根据直流总线电压和电池电压，转换器会用作同步降压转换器或同步升压转换器，在这种情况下只会在两个开关之间切换，因此减少了开关损耗，实现了更高的效率。只有当直流总线电压和电池电压彼此接近时，转换器才会用作降压/升压转换器。