UC1844A 电流模式 PWM 控制器

The UC1842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5mA. Oscillator discharge is trimmed to 8.3mA. During under voltage lockout, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

UC1844A
Topology Boost, Flyback, Forward
Control Method Current    
Duty Cycle (Max) (%) 50    
Frequency (Max) (kHz) 450    
UVLO Thresholds On/Off (V) 16/10    
Pin/Package 20LCCC, 8CDIP    
Vin (Min) (V) 10    
Vin (Max) (V) 30    
Regulated Outputs (#) 1    
Operating Temperature Range (C) -55 to 125    
Rating Military    
UC1844A 特性
UC1844A 芯片订购指南
器件 状态 温度 (oC) 价格(美元) 封装 | 引脚 封装数量 | 封装载体 丝印标记
5962-8670407PA ACTIVE -55 to 125 9.85 | 100u CDIP (JG) | 8 1 | TUBE  
5962-8670407XA ACTIVE -55 to 125 16.21 | 100u LCCC (FK) | 20 1 | TUBE  
UC1844AJ ACTIVE -55 to 125 6.06 | 100u CDIP (JG) | 8 1 | TUBE  
UC1844AJ883B ACTIVE -55 to 125 9.85 | 100u CDIP (JG) | 8 1 | TUBE  
UC1844AL883B ACTIVE -55 to 125 16.21 | 100u LCCC (FK) | 20 1 | TUBE  
UC1844A 质量与无铅数据
器件 环保计划* 铅/焊球涂层 MSL 等级/回流焊峰 环保信息与无铅 (Pb-free) DPPM / MTBF / FIT 率
5962-8670407PA TBD   Call TI   Call TI 5962-8670407PA 5962-8670407PA
5962-8670407XA TBD   Call TI   Call TI 5962-8670407XA 5962-8670407XA
UC1844AJ TBD   A42   N/A for Pkg Type UC1844AJ UC1844AJ
UC1844AJ883B TBD   A42   N/A for Pkg Type UC1844AJ883B UC1844AJ883B
UC1844AL883B TBD   POST-PLATE   N/A for Pkg Type UC1844AL883B UC1844AL883B
UC1844A 工具与软件
培训内容 型号 软件/工具类型
最常用开关模式电源的功率级设计器 POWERSTAGE-DESIGNER 分析软件
UC1844A 应用技术支持与电子电路设计开发资源下载
  1. UC1844A数据资料 dataSheet 下载.PDF
  2. TI 德州仪器电源管理选型与价格参考 . xls
  3. Current Doubler Rectifier Offers Ripple Current Cancellation
  4. DN-43 Simple Techniques to Generate a Negative Voltage Bias Supply
  5. DN-56A, Single Switch Flyback Circuit Converts + 5 V to +/- 12 V for RS-232/422
  6. DN-65 Considerations in Powering BiCMOS ICs
  7. DN-48 Versatile Low Power SEPIC Converter Accepts Wide Input Voltage Range
  8. U-133A UCC3800/1/2/3/4/5 BiCMOS Current Mode Control IC's
  9. U-111, Practical Considerations in Current Mode Power Supplies
  10. DN-54 Innovative Buck Regulator Uses High Side N-Channel Switch Without Complex
  11. DN-46 Highly Efficient Low Power DC to DC Inverter Converts +5V Input to -3V Out