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UC1843-HIREL

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电流模式 PWM 控制器

UC1843-HIREL 处于停产状态
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UC2843A 正在供货 具有 8.4V/7.6V UVLO 100% 占空比、温度范围为 40°C 至 85°C 的 30V、1A、500KHz 电流模式 PWM 控制器 Replacement

产品详情

Topology Boost, Flyback, Forward Control mode Current Duty cycle (max) (%) 100 Switching frequency (max) (kHz) 500 Features Error amplifier, Multi-topology UVLO thresholds on/off (V) 8.4/7.6 Operating temperature range (°C) -55 to 125 Rating Military Gate drive (typ) (A) 1 Vin (max) (V) 30
Topology Boost, Flyback, Forward Control mode Current Duty cycle (max) (%) 100 Switching frequency (max) (kHz) 500 Features Error amplifier, Multi-topology UVLO thresholds on/off (V) 8.4/7.6 Operating temperature range (°C) -55 to 125 Rating Military Gate drive (typ) (A) 1 Vin (max) (V) 30
DIESALE (KGD) See data sheet
  • –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

  • –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

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%.

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%.

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类型 标题 下载最新的英语版本 日期
* 数据表 Current Mode PWM Controller 数据表 (Rev. A) 2009年 8月 12日
应用手册 DN-62 开关电源拓扑电压模式与 电流模式 英语版 2010年 7月 28日
应用手册 U-100A UC3842/3/4/5 提供低成本电流模式控制 英语版 2010年 7月 28日
应用手册 UCC38C42 系列高速 BiCMOS 电流模式 PWM 控制器 2002年 2月 7日
应用手册 DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 1999年 9月 5日
应用手册 DN-27 UC1842/UC1842A Family - Summary of Functional Differences 1999年 9月 5日
应用手册 DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 1999年 9月 5日
应用手册 DN-30 Programmable Electronic Circuit Breaker 1999年 9月 5日
应用手册 DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 1999年 9月 5日
应用手册 DN-65 Considerations in Powering BiCMOS ICs 1999年 9月 5日
应用手册 DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 1999年 9月 5日
应用手册 Modeling, Analysis and Compensation of the Current-Mode Converter 1999年 9月 5日
应用手册 U-111, Practical Considerations in Current Mode Power Supplies 1999年 9月 5日

设计和开发

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封装 引脚 下载
DIESALE (KGD)

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

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