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AC/DC & DC/DC controllers (external FET)

UC1844A-EP

現行

強化型產品電流模式 Pwm 控制器

立即訂購
產品規格表

UC1844A-EP

現行
產品規格表 立即訂購

產品詳細資料

Vin (max) (V) 30 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating HiRel Enhanced Product Duty cycle (max) (%) 50
Vin (max) (V) 30 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating HiRel Enhanced Product Duty cycle (max) (%) 50
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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類型 標題 日期
* Data sheet Current-Mode PWM Controller. datasheet (Rev. D) 2013年 1月 14日
Application note UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 2002年 2月 7日
Application note DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 1999年 9月 5日
Application note DN-27 UC1842/UC1842A Family - Summary of Functional Differences 1999年 9月 5日
Application note DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 1999年 9月 5日
Application note DN-30 Programmable Electronic Circuit Breaker 1999年 9月 5日
Application note DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 1999年 9月 5日
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 1999年 9月 5日
Application note DN-65 Considerations in Powering BiCMOS ICs 1999年 9月 5日
Application note DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 1999年 9月 5日
Application note Modeling, Analysis and Compensation of the Current-Mode Converter 1999年 9月 5日
Application note U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control 1999年 9月 5日
Application note U-111, Practical Considerations in Current Mode Power Supplies 1999年 9月 5日

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