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UCC28250PWT PDF预览

UCC28250PWT

更新时间： 2024-11-24 11:50:43
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
50页 760K
描述
Advanced PWM Controller With Pre-Bias Operation

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UCC28250PWT 技术参数

生命周期：Obsolete零件包装代码：TSSOP
包装说明：TSSOP-20针数：20
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.74
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：PULSE WIDTH MODULATION
最大输入电压：17 V最小输入电压：4.7 V
标称输入电压：12 VJESD-30 代码：R-PDSO-G20
JESD-609代码：e4长度：6.5 mm
功能数量：1端子数量：20
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：TSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
认证状态：Not Qualified座面最大高度：1.2 mm
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：1150 kHz温度等级：AUTOMOTIVE
端子面层：NICKEL PALLADIUM GOLD端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
宽度：4.4 mmBase Number Matches：1

UCC28250PWT 数据手册

 浏览型号UCC28250PWT的Datasheet PDF文件第2页浏览型号UCC28250PWT的Datasheet PDF文件第3页浏览型号UCC28250PWT的Datasheet PDF文件第4页浏览型号UCC28250PWT的Datasheet PDF文件第5页浏览型号UCC28250PWT的Datasheet PDF文件第6页浏览型号UCC28250PWT的Datasheet PDF文件第7页 
UCC28250  
www.ti.com  
SLUSA29B –APRIL 2010–REVISED OCTOBER 2010  
Advanced PWM Controller With Pre-Bias Operation  
Check for Samples: UCC28250  
1
FEATURES  
DESCRIPTION  
•
Pre-biased Startup  
The UCC28250 PWM controller is designed for high  
power density applications that may have stringent  
pre-biased startup requirements. The UCC28250’s  
integrated synchronous rectifier control outputs target  
high efficiency and high performance topologies such  
as half-bridge, full-bridge, interleaved forward, and  
push-pull. The UCC27200 half bridge drivers and  
UCC2732X MOSFET drivers used in conjunction with  
the UCC28250 provide a complete power converter  
solution.  
•
Synchronous Rectifier Control Outputs with  
Programmable Delays (Including Zero Delay  
Support)  
•
Voltage Mode Control with Input Voltage  
Feed-Forward or Current Mode Control  
•
•
•
•
Primary or Secondary-Side Control  
3.3-V, 1.5% Accurate Reference Output  
1-MHz Capable Switching Frequency  
Externally  
programmable  
soft-start,  
used  
in  
1% Accurate Cycle-by-Cycle Over Current  
Protection with Matched Duty Cycle Outputs  
conjunction with an internal pre-biased startup circuit,  
allows the controller to gradually reach a steady-state  
operating point under all output conditions. The  
UCC28250 can be configured for primary or  
secondary-side control and either voltage or current  
mode control can be implemented.  
•
•
Programmable Soft-Start and Hiccup Restart  
Timer  
Thermally Enhanced 4-mm x 4-mm QFN-20  
Package and 20-pin TSSOP Package  
The oscillator operates at frequencies up to 2 MHz,  
and can be synchronized to an external clock. Input  
voltage feedforward, cycle-by-cycle current limit, and  
a programmable hiccup timer allow the system to  
stay within a safe operation range. Input voltage,  
output voltage and temperature protection can be  
implemented. Dead time between primary-side switch  
and secondary-side synchronous rectifiers can be  
independently programmed.  
APPLICATIONS  
•
Half-Bridge, Full-Bridge, Interleaved Forward,  
and Push-Pull Isolated Converters  
•
•
•
•
Telecom and Data-com Power  
Wireless Base Station Power  
Server Power  
Industrial Power Systems  
Simplified Application Diagram  
VIN (36 V ~ 75 V)  
VIN (36 V ~ 75 V)  
UCC27200  
UCC28250  
VOUT  
OVP  
OUTA  
OUTB  
SRA  
HI  
HI  
RAMP  
RT  
LO  
LO  
Isolation  
UCC2732x  
SS  
SRB  
COMP  
Feedback and Isolation  
GND  
Not Shown: PS, SP, HICC, VDD, EA+, EA-, VREF, EN, ILIM, AND VSENSE  
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 © 2010, Texas Instruments Incorporated  
1234567...50

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