UC1846 电流模式 PWM 控制器

The UC1846/7 family of control ICs provides all of the necessary features to implement fixed frequency, current mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel "power modules" while maintaining equal current sharing.

Protection circuitry includes built-in under-voltage lockout and programmable current limit in addition to soft start capability. A shut-down function is also available which can initiate either a complete shutdown with automatic restart or latch the supply off

UC1846
Topology Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
Control Method Current    
Duty Cycle (Max) (%) 50    
Frequency (Max) (kHz) 450    
UVLO Thresholds On/Off (V) 7.7/6.95    
Pin/Package 16CDIP, 20LCCC    
Approx. Price (US$) 7.23 | 100u    
Vin (Min) (V) 7    
Vin (Max) (V) 40    
Regulated Outputs (#) 2    
Operating Temperature Range (C) -55 to 125    
Rating Military    
UC1846 特性
UC1846 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
5962-86806012A ACTIVE -55 to 125 25.44 | 100u LCCC (FK) | 20 1 | TUBE  
5962-8680601EA ACTIVE -55 to 125 12.05 | 100u CDIP (J) | 16 1 | TUBE  
UC1846J ACTIVE -55 to 125 7.23 | 100u CDIP (J) | 16 1 | TUBE  
UC1846J883B ACTIVE -55 to 125 12.05 | 100u CDIP (J) | 16 1 | TUBE  
UC1846L883B ACTIVE -55 to 125 25.44 | 100u LCCC (FK) | 20 1 | TUBE  
UC1846 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
5962-86806012A TBD   Call TI   Call TI 5962-86806012A 5962-86806012A
5962-8680601EA TBD   Call TI   Call TI 5962-8680601EA 5962-8680601EA
UC1846J TBD   A42   N/A for Pkg Type UC1846J UC1846J
UC1846J883B TBD   A42   N/A for Pkg Type UC1846J883B UC1846J883B
UC1846L883B TBD   POST-PLATE   N/A for Pkg Type UC1846L883B UC1846L883B
UC1846 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
UC1846 应用技术支持与电子电路设计开发资源下载
  1. UC1846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