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UCC28702DBVR PDF预览

UCC28702DBVR

更新时间: 2024-11-09 01:08:15
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德州仪器 - TI /
页数 文件大小 规格书
31页 1818K
描述
Constant-Voltage, Constant-Current Controller With Primary-Side Regulation

UCC28702DBVR 数据手册

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UCC28700, UCC28701  
UCC28702, UCC28703  
www.ti.com  
SLUSB41 – JULY 2012  
Constant-Voltage, Constant-Current Controller  
With Primary-Side Regulation  
Check for Samples: UCC28700, UCC28701, UCC28702, UCC28703  
1
FEATURES  
DESCRIPTION  
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 stand-by power  
without sacrificing start-up time or output transient  
response.  
< 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  
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.  
Wide VDD Range Allows Small Bias Capacitor  
Clamped Gate-Drive Output for MOSFET  
Protection Functions: Over-Voltage, Low-Line,  
and Over-Current  
Programmable Cable Compensation  
(UCC28700 only)  
NTC Resistor Interface (UCC28701, UCC28702  
and UCC28703 only) with Fixed Cable  
Compensation Options  
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  
SOT23-6 Package  
APPLICATIONS  
USB-Compliant Adapters and Chargers for  
Consumer Electronics (cell phones, tablets  
and cameras)  
remote temperature sensing using  
a
Negative  
Temperature Coefficient (NTC) resistor while  
providing fixed cable-compensation levels.  
AC and DC Power Supplies  
Simplified Application Diagram and Typical V-I Regulation  
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 © 2012, Texas Instruments Incorporated  

UCC28702DBVR 替代型号

型号 品牌 替代类型 描述 数据表
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