UC1842 电流模式 PWM 控制器

The UC1842/3/4/5 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state.

Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges

UC1842
Topology Boost, Flyback, Forward    
Control Method Current    
Duty Cycle (Max) (%) 100    
Frequency (Max) (kHz) 450    
UVLO Thresholds On/Off (V) 16/10    
Pin/Package 14CFP, 20LCCC, 8CDIP
Vin (Min) (V) 10    
Vin (Max) (V) 30    
Regulated Outputs (#) 1    
Operating Temperature Range (C) -55 to 125    
Rating Military    
UC1842 特性
UC1842 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
5962-8670401PA ACTIVE -55 to 125 6.88 | 100u CDIP (JG) | 8 1 | TUBE  
5962-8670401XA ACTIVE -55 to 125 14.97 | 100u LCCC (FK) | 20 1 | TUBE  
UC1842J ACTIVE -55 to 125 4.13 | 100u CDIP (JG) | 8 1 | TUBE  
UC1842J883B ACTIVE -55 to 125 6.88 | 100u CDIP (JG) | 8 1 | TUBE  
UC1842L883B ACTIVE -55 to 125 14.97 | 100u LCCC (FK) | 20 1 | TUBE  
UC1842W ACTIVE -55 to 125 10.43 | 100u CFP (W) | 14 1 | TUBE  
UC1842 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
5962-8670401PA TBD   Call TI   Call TI 5962-8670401PA 5962-8670401PA
5962-8670401XA TBD   Call TI   Call TI 5962-8670401XA 5962-8670401XA
UC1842J TBD   A42   N/A for Pkg Type UC1842J UC1842J
UC1842J883B TBD   A42   N/A for Pkg Type UC1842J883B UC1842J883B
UC1842L883B TBD   POST-PLATE   N/A for Pkg Type UC1842L883B UC1842L883B
UC1842W TBD   A42   N/A for Pkg Type UC1842W UC1842W
UC1842 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
UC1842 应用技术支持与电子电路设计开发资源下载
  1. UC1842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