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PWM 控制器

UC1843A-EP

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增强型产品电流模式 Pwm 控制器

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数据表

UC1843A-EP

正在供货
数据表 立即订购

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 HiRel Enhanced Product Gate drive (typ) (A) 1 Vin (max) (V) 25
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 HiRel Enhanced Product Gate drive (typ) (A) 1 Vin (max) (V) 25
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Controlled Baseline
    • One Assembly/Test Site, One Fabrication Site
  • Extended Temperature Performance of –55°C to 125°C
  • Enhanced Diminishing Manufacturing Sources (DMS) Support
  • Enhanced Product Change Notification
  • Qualification Pedigree(1)
  • Optimized for Off-line and DC-to-DC Converters
  • Low Start Up Current (<0.5 mA)
  • Trimmed Oscillator Discharge Current
  • 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

(1) Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.
  • Controlled Baseline
    • One Assembly/Test Site, One Fabrication Site
  • Extended Temperature Performance of –55°C to 125°C
  • Enhanced Diminishing Manufacturing Sources (DMS) Support
  • Enhanced Product Change Notification
  • Qualification Pedigree(1)
  • Optimized for Off-line and DC-to-DC Converters
  • Low Start Up Current (<0.5 mA)
  • Trimmed Oscillator Discharge Current
  • 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

(1) Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.

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 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

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 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
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技术文档

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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. D) 2013年 1月 14日
* 辐射与可靠性报告 UC1843AMDREP Reliability Report 2014年 12月 22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
SOIC (D) 8 查看选项
应遵守 TI 评估类商品的标准条款与条件。

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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