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AC/DC & DC/DC converters (integrated FET)

UCC28881

現行

700-V 最低靜態電流離線切換器

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產品規格表

UCC28881

現行
產品規格表 立即訂購

產品詳細資料

Iout (max) (A) 0.225 Vin (min) (V) 36 Vin (max) (V) 450 Topology Buck, Buck boost, Buck-Boost, Flyback Switching frequency (max) (kHz) 62 Features Current limiting, Green mode, High voltage startup, High-voltage startup, Integrated Switch, Leading edge blanking, Light load efficiency, Light-load efficiency, Low power, Overcurrent protection, Overtemperature protection, Soft start, Thermal shutdown Control mode Voltage Vout (min) (V) 5 Vout (max) (V) 60 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00001
Iout (max) (A) 0.225 Vin (min) (V) 36 Vin (max) (V) 450 Topology Buck, Buck boost, Buck-Boost, Flyback Switching frequency (max) (kHz) 62 Features Current limiting, Green mode, High voltage startup, High-voltage startup, Integrated Switch, Leading edge blanking, Light load efficiency, Light-load efficiency, Low power, Overcurrent protection, Overtemperature protection, Soft start, Thermal shutdown Control mode Voltage Vout (min) (V) 5 Vout (max) (V) 60 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00001
SOIC (D) 7 29.4 mm² 4.9 x 6
  • Integrated 14-Ω, 700-V Power MOSFET
  • Integrated High-Voltage Current Source for Internal Device Bias Power
  • Integrated Current Sense
  • Internal Soft Start
  • Self-Biased Switcher (Start Up and Operation Directly from Rectified Mains Voltage)
  • Supports Buck, Buck-Boost and Flyback Topologies
  • <100-μA Device Quiescent Current
  • Robust Current Protection During Load Short Circuit
  • Protection
    • Current Limit
    • Overload and Output Short Circuit
    • Over Temperature
  • Integrated 14-Ω, 700-V Power MOSFET
  • Integrated High-Voltage Current Source for Internal Device Bias Power
  • Integrated Current Sense
  • Internal Soft Start
  • Self-Biased Switcher (Start Up and Operation Directly from Rectified Mains Voltage)
  • Supports Buck, Buck-Boost and Flyback Topologies
  • <100-μA Device Quiescent Current
  • Robust Current Protection During Load Short Circuit
  • Protection
    • Current Limit
    • Overload and Output Short Circuit
    • Over Temperature

The UCC28881 integrates the controller and a 14-Ω, 700-V power MOSFET into one monolithic device. The device also integrates a high-voltage current source, enabling start up and operation directly from the rectified mains voltage. UCC28881 is the same family device of UCC28880, with higher current handling capability.

The low quiescent current of the device enables excellent efficiency. With the UCC28881 the most common converter topologies, such as buck, buck-boost and flyback can be built using a minimum number of external components.

The UCC28881 incorporates a soft-start feature for controlled start up of the power stage which minimizes the stress on the power-stage components.

The UCC28881 integrates the controller and a 14-Ω, 700-V power MOSFET into one monolithic device. The device also integrates a high-voltage current source, enabling start up and operation directly from the rectified mains voltage. UCC28881 is the same family device of UCC28880, with higher current handling capability.

The low quiescent current of the device enables excellent efficiency. With the UCC28881 the most common converter topologies, such as buck, buck-boost and flyback can be built using a minimum number of external components.

The UCC28881 incorporates a soft-start feature for controlled start up of the power stage which minimizes the stress on the power-stage components.
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類型 標題 日期
* Data sheet UCC28881 700-V, 225-mA Low Quiescent Current Off-Line Converter datasheet (Rev. B) PDF | HTML 2016年 1月 11日
Application note Operating UCC2888x Offline Buck in Saturation for Cost Reduction 2018年 6月 22日
Technical article How to build a cost-competitive and robust auxiliary power supply PDF | HTML 2018年 2月 1日
Application note UCC2888x Diode Selection When Configured as High Side Buck 2017年 11月 20日
Technical article Unique techniques to increase controller power PDF | HTML 2017年 8月 23日
Application note UCC28880, UCC28881 Audible Noise Reduction Techniques 2017年 3月 23日
Technical article Powering the IoT PDF | HTML 2017年 1月 26日
EVM User's guide Using the UCC28881EVM-680 (Rev. A) 2015年 12月 8日
Technical article Power Tips: Design considerations of high-voltage converters in a cascode MOSFET PDF | HTML 2015年 11月 3日

設計與開發

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開發板

UCC28881EVM-680 — UCC28881 離線高壓側降壓轉換器評估模組

The UCC28881EVM-680 evaluation module (EVM) is an offline high-voltage buck-type power supply that provides 13 VDC at a maximum output of 225 mA. The input accepts a voltage range of 85 VAC to 265 VAC.

使用指南: PDF
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模擬型號

UCC28881 PSpice Transient Model

SLUM501.ZIP (130 KB) - PSpice Model
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計算工具

SLUC626 — UCC28881 Design Calculator

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AC/DC & DC/DC converters (integrated FET)
UCC28881 — 700-V 最低靜態電流離線切換器
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