电流模式 PWM 控制器 - UC1843-HIREL

UC1843-HIREL (正在供货)

电流模式 PWM 控制器

 

描述

The UC1843 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. The under-voltage lockout threshold is 8.4 V and maximum duty cycle range is around 100%.

特性

  • –55°C to 125°C Known Good Die
  • Controlled Baseline
  • Optimized For Off-line and DC-to-DC Converters
  • Low Start-Up Current (<1 mA)
  • Automatic Feed Forward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Under-Voltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High Current Totem Pole Output
  • Internally Trimmed Bandgap Reference
  • 500-kHz Operation
  • Low RO Error Amp

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参数 与其它产品相比 离线和隔离式直流/直流控制器和转换器

 
Control Method
Vin (Min) (V)
Vin (Max) (V)
Topology
Duty Cycle (Max) (%)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Features
Rating
Operating Temperature Range (C)
UC1843-HIREL
Current   
7.6   
30   
Boost
Flyback
Forward   
100   
500   
8.4/7.6   
Error Amplifier
Multi-topology   
Catalog   
-55 to 125   

其它合格版本 UC1843-HIREL

版本 器件型号 定义
宇航 UC1843-SP 抗辐射、陶瓷封装,适用于太空应用