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AC/DC 控制器

UCC2805

現行

具有 4.1V/3.6V UVLO 和 50% 占空比 的 12V、1A 低功耗 BICMOS 1MHz 電流模式 PWM

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產品規格表

UCC2805

現行
產品規格表 立即訂購

產品詳細資料

Topology Boost, Flyback, Forward Control mode Current Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Leading edge blanking, Multi-topology, Soft start Duty cycle (max) (%) 50
Topology Boost, Flyback, Forward Control mode Current Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Fixed frequency, Leading edge blanking, Multi-topology, Soft start Duty cycle (max) (%) 50
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) TSSOP (PW) 8 19.2 mm² (3 mm × 6.4 mm)
  • 100µA typical starting supply current
  • 500µA typical operating supply current
  • Operation up to 1MHz
  • Internal soft start
  • Internal fault soft start
  • Internal leading-edge blanking of the current sense signal
  • 1A totem-pole output
  • 70ns typical response from current-sense to gate drive output
  • 1.5% tolerance voltage reference
  • Same pinout as UC3842 and UC3842A
  • 100µA typical starting supply current
  • 500µA typical operating supply current
  • Operation up to 1MHz
  • Internal soft start
  • Internal fault soft start
  • Internal leading-edge blanking of the current sense signal
  • 1A totem-pole output
  • 70ns typical response from current-sense to gate drive output
  • 1.5% tolerance voltage reference
  • Same pinout as UC3842 and UC3842A

The UCC280x family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies with minimal parts count.

These devices have the same pin configuration as the UCx84x family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCC280x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of critical voltage levels. Lower reference parts such as the UCC2803 and UCC2805 fit best into battery-operated systems, while the higher reference and higher UVLO hysteresis of the UCC2802 and UCC2804 make these ideal choices for use in off-line power supplies.

The UCC280x series is specified for operation from –40°C to 125°C.

The UCC280x family of high-speed, low-power integrated circuits contain all of the control and drive components required for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies with minimal parts count.

These devices have the same pin configuration as the UCx84x family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCC280x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of critical voltage levels. Lower reference parts such as the UCC2803 and UCC2805 fit best into battery-operated systems, while the higher reference and higher UVLO hysteresis of the UCC2802 and UCC2804 make these ideal choices for use in off-line power supplies.

The UCC280x series is specified for operation from –40°C to 125°C.
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技術文件

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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 UCC280x Low-Power BiCMOS Current-Mode PWM Controllers datasheet (Rev. H) PDF | HTML 2025/4/25
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
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
應用說明 UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 2002/2/7
應用說明 Differences Between the UCC3813 and the UCC3800 PWM Families 2000/6/2
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-54 Innovative Buck Regulator Uses High Side N-Channel Switch Without Complex 1999/9/5
應用說明 DN-43 Simple Techniques to Generate a Negative Voltage Bias Supply 1999/9/5
應用說明 U-111, Practical Considerations in Current Mode Power Supplies 1999/9/5
應用說明 DN-56A, Single Switch Flyback Circuit Converts + 5 V to +/- 12 V for RS-232/422 1999/9/5
應用說明 DN-30 Programmable Electronic Circuit Breaker 1999/9/5
應用說明 DN-48 Versatile Low Power SEPIC Converter Accepts Wide Input Voltage Range 1999/9/5
應用說明 DN-46 Highly Efficient Low Power DC to DC Inverter Converts +5V Input to -3V Out 1999/9/5
應用說明 U-133A UCC3800/1/2/3/4/5 BiCMOS Current Mode Control IC's 1999/9/5

設計與開發

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模擬型號

UCCX805 & UCCX813-5 TINA-TI Startup Reference Design

SLUM231.TSC (667 KB) - TINA-TI 參考設計
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模擬型號

UCCX805 & UCCX813-5 TINA-TI Steady State Reference Design

SLUM230.TSC (668 KB) - TINA-TI 參考設計
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模擬型號

UCCX805 & UCCX813-5 TINA-TI Transient Spice Model

SLUM229.ZIP (28 KB) - TINA-TI Spice 模型
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模擬型號

UCCx805 & UCCx813-5 Unencrypted PSpice Transient Model

SLUM516.ZIP (6 KB) - PSpice 模型
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模擬型號

UCCx805, UCCx813-5 Families PSpice Transient Model (Rev. B)

SLUM081A (88 KB) - PSpice 模型
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參考設計

PMP20852 — 3W 隔離三路輸出返馳式轉換器參考設計

PMP20852 是使用 UCC2805 控制器 IC 進行一次側穩壓的隔離返馳式轉換器參考設計。二次側有三個獨立隔離輸出，每個輸出都使用 LP2951 線性穩壓器，以在三個軌上的每個軌上提供穩定的 16V 輸出。此設計接受 10Vin 至 14Vin 的輸入電壓（額定電壓為 12Vin），並提供三個隔離式 16Voutput 輸出軌，每個輸出軌能夠為負載供應 65mA 的連續電流。此設計以 2 層 PCB 為基礎，且每層各有 1oz 的銅。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOIC (D) 8 Ultra Librarian
TSSOP (PW) 8 Ultra Librarian
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