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AC/DC 控制器

TL2844

現行

具有 16V/10V UVLO 50% 工作週期、-40C 至 85C 的經濟型單端 500KHz 電流模式 PWM 控制器

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TL2844B 現行 具 16V/10V UVLO、50% 工作週期、-40C 至 85C 的 30V、0.2A 高性能 500KHz 電流模式 PWM Pin-to-pin equivalent with reduced start-up current

TL2844

現行
立即訂購

產品詳細資料

Topology Boost, Flyback Control mode Current Features Adjustable switching frequency, Current limiting, Error amplifier, Fixed frequency, Multi-topology Duty cycle (max) (%) 50
Topology Boost, Flyback Control mode Current Features Adjustable switching frequency, Current limiting, Error amplifier, Fixed frequency, Multi-topology Duty cycle (max) (%) 50
SOIC (D) 14 51.9 mm² (8.65 mm × 6 mm) PDIP (P) 8 92.5083 mm² (9.81 mm × 9.43 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Optimized for off-line and DC-to-DC converters
  • Low start-up current (< 1mA)
  • Automatic feed-forward compensation
  • Pulse-by-pulse current limiting
  • Enhanced load-response, characteristics
  • Undervoltage lockout with hysteresis
  • Double-pulse suppression
  • High-current totem-pole output
  • Internally trimmed bandgap reference
  • 500kHz operation
  • Error amplifier with low output resistance
  • Designed to be interchangeable with UC2842 and UC3842 series
  • Optimized for off-line and DC-to-DC converters
  • Low start-up current (< 1mA)
  • Automatic feed-forward compensation
  • Pulse-by-pulse current limiting
  • Enhanced load-response, characteristics
  • Undervoltage lockout with hysteresis
  • Double-pulse suppression
  • High-current totem-pole output
  • Internally trimmed bandgap reference
  • 500kHz operation
  • Error amplifier with low output resistance
  • Designed to be interchangeable with UC2842 and UC3842 series

The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that 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 when it is in the off state.

The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that 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 when it is in the off state.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 TLx84x Current-Mode PWM Controllers datasheet (Rev. J) PDF | HTML 2024/10/11
應用說明 Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps (Rev. A) PDF | HTML 2021/6/11
應用說明 Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 2019/3/12
應用說明 UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 2002/2/7
應用說明 DN-65 Considerations in Powering BiCMOS ICs 1999/9/5
應用說明 DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 1999/9/5
應用說明 DN-27 UC1842/UC1842A Family - Summary of Functional Differences 1999/9/5
應用說明 DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 1999/9/5
應用說明 DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 1999/9/5
應用說明 DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 1999/9/5
應用說明 U-111, Practical Considerations in Current Mode Power Supplies 1999/9/5
應用說明 U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control 1999/9/5
應用說明 DN-30 Programmable Electronic Circuit Breaker 1999/9/5
應用說明 DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 1999/9/5
應用說明 DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 1999/9/5
應用說明 Understanding Buck Power Stages In Switchmode Power Supplies 1999/3/4
應用說明 Understanding Boost Power Stages In Switchmode Power Supplies 1999/3/4

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SOIC (D) 14 Ultra Librarian
PDIP (P) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian
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