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UCC28720DR PDF预览

UCC28720DR

更新时间： 2024-11-23 12:03:43
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
29页 1053K
描述
Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

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UCC28720DR 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：ActiveReach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
Factory Lead Time：6 weeks风险等级：1.68
Is Samacsys：N模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT/VOLTAGE-MODE控制技术：FREQUENCY MODULATION
JESD-30 代码：R-PDSO-G7JESD-609代码：e4
长度：4.9 mm湿度敏感等级：1
功能数量：1端子数量：7
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP7/8,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE认证状态：Not Qualified
座面最大高度：1.75 mm子类别：Switching Regulator or Controllers
标称供电电压 (Vsup)：25 V表面贴装：YES
最大切换频率：740 kHz温度等级：AUTOMOTIVE
端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
宽度：3.91 mmBase Number Matches：1

UCC28720DR 数据手册

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UCC28720  
www.ti.com  
SLUSBE8 –MAY 2013  
Constant-Voltage, Constant-Current Controller With Primary-Side Regulation  
Check for Samples: UCC28720  
1
FEATURES  
APPLICATIONS  
•
•
< 10-mW No-Load Power  
•
USB-Compliant Adapters and Chargers for  
Consumer Electronics  
Primary-Side Regulation (PSR) Eliminates  
Opto-Coupler  
–
–
–
Smart phones  
Tablet computers  
Cameras  
•
±5% Voltage and Current Regulation Across  
Line and Load  
•
•
700-V Start-Up Switch  
•
•
Standby Supply for TV and Desktop  
White Goods  
80-kHz Maximum Switching Frequency  
Enables High-Power Density Charger Designs  
•
Quasi-Resonant Valley-Switching Operation  
for Highest Overall Efficiency  
DESCRIPTION  
The UCC28720 flyback power supply controller  
provides isolated-output 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.  
•
•
•
Wide VDD Range Allows Small Bias Capacitor  
Dynamic BJT Drive  
Overvoltage, Low-Line, and Overcurrent  
Protection Functions  
•
•
Programmable Cable Compensation  
SOIC-7 Package  
An internal 700-V start-up switch, dynamically-  
controlled operating states and a tailored modulation  
profile support ultra-low standby power without  
sacrificing start-up time or output transient response.  
SIMPLIFIED APPLICATION  
Control algorithms in the UCC28720 allow operating  
efficiencies to meet or exceed applicable standards.  
The output drive interfaces to a bipolar transistor  
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.  
VOUT  
–
VAC  
UCC28720  
VAUX  
VDD  
HV  
DRV  
CS  
VS  
The controller has a maximum switching frequency of  
80 kHz and always maintains control of the peak-  
primary current in the transformer. Protection features  
help keep primary and secondary component  
stresses in check. The UCC28720 allows  
compensation for voltage drop in the cable to be  
programmed with an external resistor.  
CBC  
GND  
UDG-13090  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2013, Texas Instruments Incorporated  
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UCC28720DR 替代型号

型号 品牌 替代类型 描述 数据表
UCC28720D TI

完全替代

 Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

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