UCC28700

現行

具 PSR 和可編程纜線補償的定電壓、定電流 PWM

立即訂購

產品規格表

document-pdfAcrobat UCC2870x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation datasheet (Rev. A) (英文) PDF | HTML

UCC28700

現行

產品規格表

立即訂購

產品詳細資料

Topology

Buck, Flyback

Control mode

Primary-side regulation

Features

CC/CV output regulation, Cable compensation, Current limiting, DCM, Leading edge blanking, Low power, Overcurrent protection, Primary-side regulated, Quasi-Resonant, Soft start, Valley switching

Duty cycle (max) (%)

99

Sector

Test & measurement

Topology

Buck, Flyback

Control mode

Primary-side regulation

Features

CC/CV output regulation, Cable compensation, Current limiting, DCM, Leading edge blanking, Low power, Overcurrent protection, Primary-side regulated, Quasi-Resonant, Soft start, Valley switching

Duty cycle (max) (%)

99

Sector

Test & measurement

SOT-23 (DBV)

6

8.12 mm² (2.9 mm × 2.8 mm)

< 30-mW No-Load Power for 5-Star Rating
Primary-Side Regulation (PSR) Eliminates Opto-Coupler
±5% Voltage and Current Regulation
130-kHz Maximum Switching Frequency Enables High-Power
Density Charger Designs
Quasi-Resonant Valley-Switching Operation for Highest
Overall Efficiency
Patent-Pending Frequency-Jitter Scheme to Ease EMI
Compliance
Wide VDD Range Allows Small Bias Capacitor
Clamped Gate-Drive Output for MOSFET
Protection Functions: Overvoltage, Low-Line, and
Overcurrent
Programmable Cable Compensation (UCC28700 Only)
NTC Resistor Interface (UCC28701, UCC28702 and UCC28703
Only) With Fixed Cable Compensation Options
SOT-23 Package

< 30-mW No-Load Power for 5-Star Rating
Primary-Side Regulation (PSR) Eliminates Opto-Coupler
±5% Voltage and Current Regulation
130-kHz Maximum Switching Frequency Enables High-Power
Density Charger Designs
Quasi-Resonant Valley-Switching Operation for Highest
Overall Efficiency
Patent-Pending Frequency-Jitter Scheme to Ease EMI
Compliance
Wide VDD Range Allows Small Bias Capacitor
Clamped Gate-Drive Output for MOSFET
Protection Functions: Overvoltage, Low-Line, and
Overcurrent
Programmable Cable Compensation (UCC28700 Only)
NTC Resistor Interface (UCC28701, UCC28702 and UCC28703
Only) With Fixed Cable Compensation Options
SOT-23 Package

The UCC28700 family of flyback power supply controllers provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Low start-up current, dynamically controlled operating states and a tailored modulation profile support very low standby power without sacrificing start-up time or output transient response.

Control algorithms in the UCC28700 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous Conduction Mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controllers have a maximum switching frequency of 130 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28700 allows the level of cable compensation to be programmed. The UCC28701, UCC28702, and UCC28703 devices allow remote temperature sensing using a Negative Temperature Coefficient (NTC) resistor while providing fixed cable-compensation levels.

The UCC28700 family of flyback power supply controllers provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Low start-up current, dynamically controlled operating states and a tailored modulation profile support very low standby power without sacrificing start-up time or output transient response.

Control algorithms in the UCC28700 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous Conduction Mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controllers have a maximum switching frequency of 130 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28700 allows the level of cable compensation to be programmed. The UCC28701, UCC28702, and UCC28703 devices allow remote temperature sensing using a Negative Temperature Coefficient (NTC) resistor while providing fixed cable-compensation levels.

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UCC28700-Q1

現行

具汽車級的小型一次側調節 PWM 控制器 Automotive qualified version

技術文件

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重要文件	類型	標題	格式選項	日期
*	資料表	UCC2870x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation datasheet (Rev. A)	PDF \| HTML	2014/12/12
	應用說明	Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips	PDF \| HTML	2021/8/31
	應用說明	L1 and L2 EV Charger Electric Vehicle Service Equipment Design Considerations (Rev. B)		2021/6/9
	應用說明	Minimize Standby Consumption for UCC287XX Family		2019/8/1
	選擇指南	Power Management Guide 2018 (Rev. R)		2018/6/25
	技術文章	Making a solar inverter more reliable than the sun	PDF \| HTML	2017/8/1
	技術文章	Common challenges when choosing the auxiliary power supply for your Server PSU	PDF \| HTML	2017/3/20
	應用說明	Troubleshooting TI PSR controllers		2016/10/3
	技術文章	USB Wall Chargers: Conveniences and Challenges	PDF \| HTML	2015/10/6
	白皮書	Control Challenges for Low Power AC/DC Converters		2015/10/2
	白皮書	Control Challenges for Low Power AC/DC Converters (PPT)		2015/10/2
	技術文章	Designing multiple output converters with primary side sensing	PDF \| HTML	2015/8/4
	應用說明	Analysis of Starting Up Performance for UCC28700		2014/3/11
	應用說明	UCC28700 5-W USB Flyback Design Review (Rev. C)		2014/2/21
	更多文件說明	Exposing the Inner Behavior of a Quasi-Resonant Flyback Converter		2013/10/29

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開發板

UCC28700EVM-068 — UCC28700 評估模組

德州儀器 UCC28700EVM-068 評估模組 (EVM) 可協助設計師評估具一次側調節的 UCC28700 定電壓、定電流 PWM 的性能。5W 評估模組用於評估 USB 應用的離線變壓器。可將 90V RMS 至 265V RMS 輸入電壓轉換為 5V 直流電，具有 1A 電流限制，適用於 USB 變壓器應用。它旨在用於評估目的，而不是最終產品。

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UCC28711EVM-160 — UCC28711 評估模組

德州儀器 UCC28711EVM-160 評估模組 (EVM) 可協助設計師評估具一次側調節的 UCC28711 定電壓、定電流 PWM 的性能。5W 評估模組用於評估 USB 應用的離線變壓器。可將 90V RMS 至 265V RMS 輸入電壓轉換為 5VDC，具有 1A 電流限制，適用於 USB 變壓器應用。它旨在用於評估目的，而不是最終產品。